Add an optional skb parameter to the zerocopy callback parameter,
which is passed down from skb_zcopy_clear(). This gives access
to the original skb, which is needed for upcoming RX zero-copy
error handling.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Replace sock_zerocopy_put with the generic skb_zcopy_put()
function. Pass 'true' as the success argument, as this
is identical to no change.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Before this change, the caller of sock_zerocopy_callback would
need to save the zerocopy status, decrement and check the refcount,
and then call the callback function - the callback was only invoked
when the refcount reached zero.
Now, the caller just passes the status into the callback function,
which saves the status and handles its own refcounts.
This makes the behavior of the sock_zerocopy_callback identical
to the tpacket and vhost callbacks.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
All 'struct ubuf_info' users should have a callback defined
as of commit 0a4a060bb2 ("sock: fix zerocopy_success regression
with msg_zerocopy").
Remove the dead code path to consume_skb(), which makes
assumptions about how the structure was allocated.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This effectively reverts commit 60724d4bae ("net: dsa: Add support for
DSA specific notifiers"). The reason is that since commit 2f1e8ea726
("net: dsa: link interfaces with the DSA master to get rid of lockdep
warnings"), it appears that there is a generic way to achieve the same
purpose. The only user thus far, the Broadcom SYSTEMPORT driver, was
converted to use the generic notifiers.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Using the NETDEV_CHANGEUPPER notifications, drivers can be aware when
they are enslaved to e.g. a bridge by calling netif_is_bridge_master().
Export this helper from DSA to get the equivalent functionality of
determining whether the upper interface of a CHANGEUPPER notifier is a
DSA switch interface or not.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
It is a bit strange to see something as specific as Broadcom SYSTEMPORT
bits in the main DSA include file. Move these away into a separate
header, and have the tagger and the SYSTEMPORT driver include them.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Some DSA switches (and not only) cannot learn source MAC addresses from
packets injected from the CPU. They only perform hardware address
learning from inbound traffic.
This can be problematic when we have a bridge spanning some DSA switch
ports and some non-DSA ports (which we'll call "foreign interfaces" from
DSA's perspective).
There are 2 classes of problems created by the lack of learning on
CPU-injected traffic:
- excessive flooding, due to the fact that DSA treats those addresses as
unknown
- the risk of stale routes, which can lead to temporary packet loss
To illustrate the second class, consider the following situation, which
is common in production equipment (wireless access points, where there
is a WLAN interface and an Ethernet switch, and these form a single
bridging domain).
AP 1:
+------------------------------------------------------------------------+
| br0 |
+------------------------------------------------------------------------+
+------------+ +------------+ +------------+ +------------+ +------------+
| swp0 | | swp1 | | swp2 | | swp3 | | wlan0 |
+------------+ +------------+ +------------+ +------------+ +------------+
| ^ ^
| | |
| | |
| Client A Client B
|
|
|
+------------+ +------------+ +------------+ +------------+ +------------+
| swp0 | | swp1 | | swp2 | | swp3 | | wlan0 |
+------------+ +------------+ +------------+ +------------+ +------------+
+------------------------------------------------------------------------+
| br0 |
+------------------------------------------------------------------------+
AP 2
- br0 of AP 1 will know that Clients A and B are reachable via wlan0
- the hardware fdb of a DSA switch driver today is not kept in sync with
the software entries on other bridge ports, so it will not know that
clients A and B are reachable via the CPU port UNLESS the hardware
switch itself performs SA learning from traffic injected from the CPU.
Nonetheless, a substantial number of switches don't.
- the hardware fdb of the DSA switch on AP 2 may autonomously learn that
Client A and B are reachable through swp0. Therefore, the software br0
of AP 2 also may or may not learn this. In the example we're
illustrating, some Ethernet traffic has been going on, and br0 from AP
2 has indeed learnt that it can reach Client B through swp0.
One of the wireless clients, say Client B, disconnects from AP 1 and
roams to AP 2. The topology now looks like this:
AP 1:
+------------------------------------------------------------------------+
| br0 |
+------------------------------------------------------------------------+
+------------+ +------------+ +------------+ +------------+ +------------+
| swp0 | | swp1 | | swp2 | | swp3 | | wlan0 |
+------------+ +------------+ +------------+ +------------+ +------------+
| ^
| |
| Client A
|
|
| Client B
| |
| v
+------------+ +------------+ +------------+ +------------+ +------------+
| swp0 | | swp1 | | swp2 | | swp3 | | wlan0 |
+------------+ +------------+ +------------+ +------------+ +------------+
+------------------------------------------------------------------------+
| br0 |
+------------------------------------------------------------------------+
AP 2
- br0 of AP 1 still knows that Client A is reachable via wlan0 (no change)
- br0 of AP 1 will (possibly) know that Client B has left wlan0. There
are cases where it might never find out though. Either way, DSA today
does not process that notification in any way.
- the hardware FDB of the DSA switch on AP 1 may learn autonomously that
Client B can be reached via swp0, if it receives any packet with
Client 1's source MAC address over Ethernet.
- the hardware FDB of the DSA switch on AP 2 still thinks that Client B
can be reached via swp0. It does not know that it has roamed to wlan0,
because it doesn't perform SA learning from the CPU port.
Now Client A contacts Client B.
AP 1 routes the packet fine towards swp0 and delivers it on the Ethernet
segment.
AP 2 sees a frame on swp0 and its fdb says that the destination is swp0.
Hairpinning is disabled => drop.
This problem comes from the fact that these switches have a 'blind spot'
for addresses coming from software bridging. The generic solution is not
to assume that hardware learning can be enabled somehow, but to listen
to more bridge learning events. It turns out that the bridge driver does
learn in software from all inbound frames, in __br_handle_local_finish.
A proper SWITCHDEV_FDB_ADD_TO_DEVICE notification is emitted for the
addresses serviced by the bridge on 'foreign' interfaces. The software
bridge also does the right thing on migration, by notifying that the old
entry is deleted, so that does not need to be special-cased in DSA. When
it is deleted, we just need to delete our static FDB entry towards the
CPU too, and wait.
The problem is that DSA currently only cares about SWITCHDEV_FDB_ADD_TO_DEVICE
events received on its own interfaces, such as static FDB entries.
Luckily we can change that, and DSA can listen to all switchdev FDB
add/del events in the system and figure out if those events were emitted
by a bridge that spans at least one of DSA's own ports. In case that is
true, DSA will also offload that address towards its own CPU port, in
the eventuality that there might be bridge clients attached to the DSA
switch who want to talk to the station connected to the foreign
interface.
In terms of implementation, we need to keep the fdb_info->added_by_user
check for the case where the switchdev event was targeted directly at a
DSA switch port. But we don't need to look at that flag for snooped
events. So the check is currently too late, we need to move it earlier.
This also simplifies the code a bit, since we avoid uselessly allocating
and freeing switchdev_work.
We could probably do some improvements in the future. For example,
multi-bridge support is rudimentary at the moment. If there are two
bridges spanning a DSA switch's ports, and both of them need to service
the same MAC address, then what will happen is that the migration of one
of those stations will trigger the deletion of the FDB entry from the
CPU port while it is still used by other bridge. That could be improved
with reference counting but is left for another time.
This behavior needs to be enabled at driver level by setting
ds->assisted_learning_on_cpu_port = true. This is because we don't want
to inflict a potential performance penalty (accesses through
MDIO/I2C/SPI are expensive) to hardware that really doesn't need it
because address learning on the CPU port works there.
Reported-by: DENG Qingfang <dqfext@gmail.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Right now, the following would happen for a switch driver that does not
implement .port_fdb_add or .port_fdb_del.
dsa_slave_switchdev_event returns NOTIFY_OK and schedules:
-> dsa_slave_switchdev_event_work
-> dsa_port_fdb_add
-> dsa_port_notify(DSA_NOTIFIER_FDB_ADD)
-> dsa_switch_fdb_add
-> if (!ds->ops->port_fdb_add) return -EOPNOTSUPP;
-> an error is printed with dev_dbg, and
dsa_fdb_offload_notify(switchdev_work) is not called.
We can avoid scheduling the worker for nothing and say NOTIFY_DONE.
Because we don't call dsa_fdb_offload_notify, the static FDB entry will
remain just in the software bridge.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
We'll need to start listening to SWITCHDEV_FDB_{ADD,DEL}_TO_DEVICE
events even for interfaces where dsa_slave_dev_check returns false, so
we need that check inside the switch-case statement for SWITCHDEV_FDB_*.
This movement also avoids a useless allocation / free of switchdev_work
on the untreated "default event" case.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Currently DSA doesn't add FDB entries on the CPU port, because it only
does so through switchdev, which is associated with a net_device, and
there are none of those for the CPU port.
But actually FDB addresses on the CPU port have some use cases of their
own, if the switchdev operations are initiated from within the DSA
layer. There is just one problem with the existing code: it passes a
structure in dsa_switchdev_event_work which was retrieved directly from
switchdev, so it contains a net_device. We need to generalize the
contents to something that covers the CPU port as well: the "ds, port"
tuple is fine for that.
Note that the new procedure for notifying the successful FDB offload is
inspired from the rocker model.
Also, nothing was being done if added_by_user was false. Let's check for
that a lot earlier, and don't actually bother to schedule the worker
for nothing.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The dev_close() call was added in commit c9eb3e0f87 ("net: dsa: Add
support for learning FDB through notification") "to indicate inconsistent
situation" when we could not delete an FDB entry from the port.
bridge fdb del d8:58:d7:00:ca:6d dev swp0 self master
It is a bit drastic and at the same time not helpful if the above fails
to only print with netdev_dbg log level, but on the other hand to bring
the interface down.
So increase the verbosity of the error message, and drop dev_close().
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Currently the bridge emits atomic switchdev notifications for
dynamically learnt FDB entries. Monitoring these notifications works
wonders for switchdev drivers that want to keep their hardware FDB in
sync with the bridge's FDB.
For example station A wants to talk to station B in the diagram below,
and we are concerned with the behavior of the bridge on the DUT device:
DUT
+-------------------------------------+
| br0 |
| +------+ +------+ +------+ +------+ |
| | | | | | | | | |
| | swp0 | | swp1 | | swp2 | | eth0 | |
+-------------------------------------+
| | |
Station A | |
| |
+--+------+--+ +--+------+--+
| | | | | | | |
| | swp0 | | | | swp0 | |
Another | +------+ | | +------+ | Another
switch | br0 | | br0 | switch
| +------+ | | +------+ |
| | | | | | | |
| | swp1 | | | | swp1 | |
+--+------+--+ +--+------+--+
|
Station B
Interfaces swp0, swp1, swp2 are handled by a switchdev driver that has
the following property: frames injected from its control interface bypass
the internal address analyzer logic, and therefore, this hardware does
not learn from the source address of packets transmitted by the network
stack through it. So, since bridging between eth0 (where Station B is
attached) and swp0 (where Station A is attached) is done in software,
the switchdev hardware will never learn the source address of Station B.
So the traffic towards that destination will be treated as unknown, i.e.
flooded.
This is where the bridge notifications come in handy. When br0 on the
DUT sees frames with Station B's MAC address on eth0, the switchdev
driver gets these notifications and can install a rule to send frames
towards Station B's address that are incoming from swp0, swp1, swp2,
only towards the control interface. This is all switchdev driver private
business, which the notification makes possible.
All is fine until someone unplugs Station B's cable and moves it to the
other switch:
DUT
+-------------------------------------+
| br0 |
| +------+ +------+ +------+ +------+ |
| | | | | | | | | |
| | swp0 | | swp1 | | swp2 | | eth0 | |
+-------------------------------------+
| | |
Station A | |
| |
+--+------+--+ +--+------+--+
| | | | | | | |
| | swp0 | | | | swp0 | |
Another | +------+ | | +------+ | Another
switch | br0 | | br0 | switch
| +------+ | | +------+ |
| | | | | | | |
| | swp1 | | | | swp1 | |
+--+------+--+ +--+------+--+
|
Station B
Luckily for the use cases we care about, Station B is noisy enough that
the DUT hears it (on swp1 this time). swp1 receives the frames and
delivers them to the bridge, who enters the unlikely path in br_fdb_update
of updating an existing entry. It moves the entry in the software bridge
to swp1 and emits an addition notification towards that.
As far as the switchdev driver is concerned, all that it needs to ensure
is that traffic between Station A and Station B is not forever broken.
If it does nothing, then the stale rule to send frames for Station B
towards the control interface remains in place. But Station B is no
longer reachable via the control interface, but via a port that can
offload the bridge port learning attribute. It's just that the port is
prevented from learning this address, since the rule overrides FDB
updates. So the rule needs to go. The question is via what mechanism.
It sure would be possible for this switchdev driver to keep track of all
addresses which are sent to the control interface, and then also listen
for bridge notifier events on its own ports, searching for the ones that
have a MAC address which was previously sent to the control interface.
But this is cumbersome and inefficient. Instead, with one small change,
the bridge could notify of the address deletion from the old port, in a
symmetrical manner with how it did for the insertion. Then the switchdev
driver would not be required to monitor learn/forget events for its own
ports. It could just delete the rule towards the control interface upon
bridge entry migration. This would make hardware address learning be
possible again. Then it would take a few more packets until the hardware
and software FDB would be in sync again.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Conntrack reassembly records the largest fragment size seen in IPCB.
However, when this gets forwarded/transmitted, fragmentation will only
be forced if one of the fragmented packets had the DF bit set.
In that case, a flag in IPCB will force fragmentation even if the
MTU is large enough.
This should work fine, but this breaks with ip tunnels.
Consider client that sends a UDP datagram of size X to another host.
The client fragments the datagram, so two packets, of size y and z, are
sent. DF bit is not set on any of these packets.
Middlebox netfilter reassembles those packets back to single size-X
packet, before routing decision.
packet-size-vs-mtu checks in ip_forward are irrelevant, because DF bit
isn't set. At output time, ip refragmentation is skipped as well
because x is still smaller than the mtu of the output device.
If ttransmit device is an ip tunnel, the packet size increases to
x+overhead.
Also, tunnel might be configured to force DF bit on outer header.
In this case, packet will be dropped (exceeds MTU) and an ICMP error is
generated back to sender.
But sender already respects the announced MTU, all the packets that
it sent did fit the announced mtu.
Force refragmentation as per original sizes unconditionally so ip tunnel
will encapsulate the fragments instead.
The only other solution I see is to place ip refragmentation in
the ip_tunnel code to handle this case.
Fixes: d6b915e29f ("ip_fragment: don't forward defragmented DF packet")
Reported-by: Christian Perle <christian.perle@secunet.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
For some reason ip_tunnel insist on setting the DF bit anyway when the
inner header has the DF bit set, EVEN if the tunnel was configured with
'nopmtudisc'.
This means that the script added in the previous commit
cannot be made to work by adding the 'nopmtudisc' flag to the
ip tunnel configuration. Doing so breaks connectivity even for the
without-conntrack/netfilter scenario.
When nopmtudisc is set, the tunnel will skip the mtu check, so no
icmp error is sent to client. Then, because inner header has DF set,
the outer header gets added with DF bit set as well.
IP stack then sends an error to itself because the packet exceeds
the device MTU.
Fixes: 23a3647bc4 ("ip_tunnels: Use skb-len to PMTU check.")
Cc: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Move the NETIF_F_RX_UDP_TUNNEL_PORT feature check into
udp_tunnel_nic_*_port() helpers, since they're always
done right before the call.
Add similar checks before calling the notifier.
udp_tunnel_nic invokes the notifier without checking
features which could result in some wasted cycles.
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
All drivers use udp_tunnel_nic_*_port() helpers, prepare for
NDO removal by invoking those helpers directly.
The helpers are safe to call on all devices, they check if
device has the UDP tunnel state initialized.
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Route removal is handled by two code paths. The main removal path is via
fib6_del_route() which will handle purging any PMTU exceptions from the
cache, removing all per-cpu copies of the DST entry used by the route, and
releasing the fib6_info struct.
The second removal location is during fib6_add_rt2node() during a route
replacement operation. This path also calls fib6_purge_rt() to handle
cleaning up the per-cpu copies of the DST entries and releasing the
fib6_info associated with the older route, but it does not flush any PMTU
exceptions that the older route had. Since the older route is removed from
the tree during the replacement, we lose any way of accessing it again.
As these lingering DSTs and the fib6_info struct are holding references to
the underlying netdevice struct as well, unregistering that device from the
kernel can never complete.
Fixes: 2b760fcf5c ("ipv6: hook up exception table to store dst cache")
Signed-off-by: Sean Tranchetti <stranche@codeaurora.org>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/1609892546-11389-1-git-send-email-stranche@quicinc.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----
iQFHBAABCgAxFiEEK3kIWJt9yTYMP3ehqclaivrt76kFAl/12xATHG1rbEBwZW5n
dXRyb25peC5kZQAKCRCpyVqK+u3vqcB6B/4xTRQCOLF1BN59AdixqGf9gdXjIpQs
R5h4WJXqh9OPS4XSckSVBVGYniT8KdfBLL0IY4NV8q2s6R6Yo70G3GTiaYXI4cX/
BaKMRcvX6p1i2qZxTtHDGYxucnKCd+yRwfWkL4GLsCNcmTWCkqUL+nGgx6UmS6eB
9fMHcLXiP9vSfJQUfAOLR33Bu2C0QslI5fX5hi8PIdKEz9cHGf3PAuaRvtWEWi3a
1Zi/iXrv/0XDcT+OE5/2tAU6n8slIA2MU/80r7KdgUrWXOfuueH/pqepYgVU0Nf2
eFH+gDYBlZucd4ef37TPIAdPTw3z4F9irOVI1iwRIWdK3aQ3jyinsVWF
=0lW0
-----END PGP SIGNATURE-----
Merge tag 'linux-can-next-for-5.12-20210106' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next
Marc Kleine-Budde says:
====================
pull-request: can-next 2021-01-06
The first 16 patches are by me and target the tcan4x5x SPI glue driver for the
m_can CAN driver. First there are a several cleanup commits, then the SPI
regmap part is converted to 8 bits per word, to make it possible to use that
driver on SPI controllers that only support the 8 bit per word mode (such as
the SPI cores on the raspberry pi).
Oliver Hartkopp contributes a patch for the CAN_RAW protocol. The getsockopt()
for CAN_RAW_FILTER is changed to return -ERANGE if the filterset does not fit
into the provided user space buffer.
The last two patches are by Joakim Zhang and add wakeup support to the flexcan
driver for the i.MX8QM SoC. The dt-bindings docs are extended to describe the
added property.
* tag 'linux-can-next-for-5.12-20210106' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next:
can: flexcan: add CAN wakeup function for i.MX8QM
dt-bindings: can: fsl,flexcan: add fsl,scu-index property to indicate a resource
can: raw: return -ERANGE when filterset does not fit into user space buffer
can: tcan4x5x: add support for half-duplex controllers
can: tcan4x5x: rework SPI access
can: tcan4x5x: add {wr,rd}_table
can: tcan4x5x: add max_raw_{read,write} of 256
can: tcan4x5x: tcan4x5x_regmap: set reg_stride to 4
can: tcan4x5x: fix max register value
can: tcan4x5x: tcan4x5x_regmap_init(): use spi as context pointer
can: tcan4x5x: tcan4x5x_regmap_write(): remove not needed casts and replace 4 by sizeof
can: tcan4x5x: rename regmap_spi_gather_write() -> tcan4x5x_regmap_gather_write()
can: tcan4x5x: remove regmap async support
can: tcan4x5x: tcan4x5x_bus: remove not needed read_flag_mask
can: tcan4x5x: mark struct regmap_bus tcan4x5x_bus as constant
can: tcan4x5x: move regmap code into seperate file
can: tcan4x5x: rename tcan4x5x.c -> tcan4x5x-core.c
can: tcan4x5x: beautify indention of tcan4x5x_of_match and tcan4x5x_id_table
can: tcan4x5x: replace DEVICE_NAME by KBUILD_MODNAME
====================
Link: https://lore.kernel.org/r/20210107094900.173046-1-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Looking for an -EINVAL all over the dsa code could take hours for
inexperienced DSA users.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20210106090915.21439-1-zajec5@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Multiple filters (struct can_filter) can be set with the setsockopt()
function, which was originally intended as a write-only operation.
As getsockopt() also provides a CAN_RAW_FILTER option to read back the
given filters, the caller has to provide an appropriate user space buffer.
In the case this buffer is too small the getsockopt() silently truncates
the filter information and gives no information about the needed space.
This is safe but not convenient for the programmer.
In net/core/sock.c the SO_PEERGROUPS sockopt had a similar requirement
and solved it by returning -ERANGE in the case that the provided data
does not fit into the given user space buffer and fills the required size
into optlen, so that the caller can retry with a matching buffer length.
This patch adopts this approach for CAN_RAW_FILTER getsockopt().
Reported-by: Phillip Schichtel <phillip@schich.tel>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Tested-By: Phillip Schichtel <phillip@schich.tel>
Link: https://lore.kernel.org/r/20201216174928.21663-1-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
A null-ptr-deref bug is reported by Hulk Robot like this:
--------------
KASAN: null-ptr-deref in range [0x0000000000000128-0x000000000000012f]
Call Trace:
qrtr_ns_remove+0x22/0x40 [ns]
qrtr_proto_fini+0xa/0x31 [qrtr]
__x64_sys_delete_module+0x337/0x4e0
do_syscall_64+0x34/0x80
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x468ded
--------------
When qrtr_ns_init fails in qrtr_proto_init, qrtr_ns_remove which would
be called later on would raise a null-ptr-deref because qrtr_ns.workqueue
has been destroyed.
Fix it by making qrtr_ns_init have a return value and adding a check in
qrtr_proto_init.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
VLAN checks for NETREG_UNINITIALIZED to distinguish between
registration failure and unregistration in progress.
Since commit cb626bf566 ("net-sysfs: Fix reference count leak")
registration failure may, however, result in NETREG_UNREGISTERED
as well as NETREG_UNINITIALIZED.
This fix is similer to cebb69754f ("rtnetlink: Fix
memory(net_device) leak when ->newlink fails")
Fixes: cb626bf566 ("net-sysfs: Fix reference count leak")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
If there is a NCI command in work queue after closing the NCI device at
nci_unregister_device, The NCI command timer starts at flush_workqueue
function and then NCI command timeout handler would be called 5 second
after flushing the NCI command work queue and destroying the queue.
At that time, the timeout handler would try to use NCI command work queue
that is destroyed already. it will causes the problem. To avoid this
abnormal situation, change the sequence to prevent the NCI command timeout
handler from being called after destroying the NCI command work queue.
Signed-off-by: Bongsu Jeon <bongsu.jeon@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The function sockfd_lookup uses fget on the value that is stored in
the file field of the returned structure, so fput should ultimately be
applied to this value. This can be done directly, but it seems better
to use the specific macro sockfd_put, which does the same thing.
Perform a source code refactoring by using the following semantic patch.
// <smpl>
@@
expression s;
@@
s = sockfd_lookup(...)
...
+ sockfd_put(s);
- fput(s->file);
// </smpl>
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Without crc32 support, this fails to link:
arm-linux-gnueabi-ld: net/wireless/scan.o: in function `cfg80211_scan_6ghz':
scan.c:(.text+0x928): undefined reference to `crc32_le'
Fixes: c8cb5b854b ("nl80211/cfg80211: support 6 GHz scanning")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use the existing offsetof() macro instead of duplicating code.
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
and bpf trees.
Current release - regressions:
- mt76: - usb: fix NULL pointer dereference in mt76u_status_worker
- sdio: fix NULL pointer dereference in mt76s_process_tx_queue
- net: ipa: fix interconnect enable bug
Current release - always broken:
- netfilter: ipset: fixes possible oops in mtype_resize
- ath11k: fix number of coding issues found by static analysis tools
and spurious error messages
Previous releases - regressions:
- e1000e: re-enable s0ix power saving flows for systems with
the Intel i219-LM Ethernet controllers to fix power
use regression
- virtio_net: fix recursive call to cpus_read_lock() to avoid
a deadlock
- ipv4: ignore ECN bits for fib lookups in fib_compute_spec_dst()
- net-sysfs: take the rtnl lock around XPS configuration
- xsk: - fix memory leak for failed bind
- rollback reservation at NETDEV_TX_BUSY
- r8169: work around power-saving bug on some chip versions
Previous releases - always broken:
- dcb: validate netlink message in DCB handler
- tun: fix return value when the number of iovs exceeds MAX_SKB_FRAGS
to prevent unnecessary retries
- vhost_net: fix ubuf refcount when sendmsg fails
- bpf: save correct stopping point in file seq iteration
- ncsi: use real net-device for response handler
- neighbor: fix div by zero caused by a data race (TOCTOU)
- bareudp: - fix use of incorrect min_headroom size
- fix false positive lockdep splat from the TX lock
- net: mvpp2: - clear force link UP during port init procedure
in case bootloader had set it
- add TCAM entry to drop flow control pause frames
- fix PPPoE with ipv6 packet parsing
- fix GoP Networking Complex Control config of port 3
- fix pkt coalescing IRQ-threshold configuration
- xsk: fix race in SKB mode transmit with shared cq
- ionic: account for vlan tag len in rx buffer len
- net: stmmac: ignore the second clock input, current clock framework
does not handle exclusive clock use well, other drivers
may reconfigure the second clock
Misc:
- ppp: change PPPIOCUNBRIDGECHAN ioctl request number to follow
existing scheme
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=N4/x
-----END PGP SIGNATURE-----
Merge tag 'net-5.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Networking fixes, including fixes from netfilter, wireless and bpf
trees.
Current release - regressions:
- mt76: fix NULL pointer dereference in mt76u_status_worker and
mt76s_process_tx_queue
- net: ipa: fix interconnect enable bug
Current release - always broken:
- netfilter: fixes possible oops in mtype_resize in ipset
- ath11k: fix number of coding issues found by static analysis tools
and spurious error messages
Previous releases - regressions:
- e1000e: re-enable s0ix power saving flows for systems with the
Intel i219-LM Ethernet controllers to fix power use regression
- virtio_net: fix recursive call to cpus_read_lock() to avoid a
deadlock
- ipv4: ignore ECN bits for fib lookups in fib_compute_spec_dst()
- sysfs: take the rtnl lock around XPS configuration
- xsk: fix memory leak for failed bind and rollback reservation at
NETDEV_TX_BUSY
- r8169: work around power-saving bug on some chip versions
Previous releases - always broken:
- dcb: validate netlink message in DCB handler
- tun: fix return value when the number of iovs exceeds MAX_SKB_FRAGS
to prevent unnecessary retries
- vhost_net: fix ubuf refcount when sendmsg fails
- bpf: save correct stopping point in file seq iteration
- ncsi: use real net-device for response handler
- neighbor: fix div by zero caused by a data race (TOCTOU)
- bareudp: fix use of incorrect min_headroom size and a false
positive lockdep splat from the TX lock
- mvpp2:
- clear force link UP during port init procedure in case
bootloader had set it
- add TCAM entry to drop flow control pause frames
- fix PPPoE with ipv6 packet parsing
- fix GoP Networking Complex Control config of port 3
- fix pkt coalescing IRQ-threshold configuration
- xsk: fix race in SKB mode transmit with shared cq
- ionic: account for vlan tag len in rx buffer len
- stmmac: ignore the second clock input, current clock framework does
not handle exclusive clock use well, other drivers may reconfigure
the second clock
Misc:
- ppp: change PPPIOCUNBRIDGECHAN ioctl request number to follow
existing scheme"
* tag 'net-5.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (99 commits)
net: dsa: lantiq_gswip: Fix GSWIP_MII_CFG(p) register access
net: dsa: lantiq_gswip: Enable GSWIP_MII_CFG_EN also for internal PHYs
net: lapb: Decrease the refcount of "struct lapb_cb" in lapb_device_event
r8169: work around power-saving bug on some chip versions
net: usb: qmi_wwan: add Quectel EM160R-GL
selftests: mlxsw: Set headroom size of correct port
net: macb: Correct usage of MACB_CAPS_CLK_HW_CHG flag
ibmvnic: fix: NULL pointer dereference.
docs: networking: packet_mmap: fix old config reference
docs: networking: packet_mmap: fix formatting for C macros
vhost_net: fix ubuf refcount incorrectly when sendmsg fails
bareudp: Fix use of incorrect min_headroom size
bareudp: set NETIF_F_LLTX flag
net: hdlc_ppp: Fix issues when mod_timer is called while timer is running
atlantic: remove architecture depends
erspan: fix version 1 check in gre_parse_header()
net: hns: fix return value check in __lb_other_process()
net: sched: prevent invalid Scell_log shift count
net: neighbor: fix a crash caused by mod zero
ipv4: Ignore ECN bits for fib lookups in fib_compute_spec_dst()
...
Pablo Neira Ayuso says:
====================
Netfilter fixes for net
The following patchset contains Netfilter fixes for net:
1) Missing sanitization of rateest userspace string, bug has been
triggered by syzbot, patch from Florian Westphal.
2) Report EOPNOTSUPP on missing set features in nft_dynset, otherwise
error reporting to userspace via EINVAL is misleading since this is
reserved for malformed netlink requests.
3) New binaries with old kernels might silently accept several set
element expressions. New binaries set on the NFT_SET_EXPR and
NFT_DYNSET_F_EXPR flags to request for several expressions per
element, hence old kernels which do not support for this bail out
with EOPNOTSUPP.
* git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf:
netfilter: nftables: add set expression flags
netfilter: nft_dynset: report EOPNOTSUPP on missing set feature
netfilter: xt_RATEEST: reject non-null terminated string from userspace
====================
Link: https://lore.kernel.org/r/20210103192920.18639-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
In lapb_device_event, lapb_devtostruct is called to get a reference to
an object of "struct lapb_cb". lapb_devtostruct increases the refcount
of the object and returns a pointer to it. However, we didn't decrease
the refcount after we finished using the pointer. This patch fixes this
problem.
Fixes: a4989fa911 ("net/lapb: support netdev events")
Cc: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Link: https://lore.kernel.org/r/20201231174331.64539-1-xie.he.0141@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Daniel Borkmann says:
====================
pull-request: bpf 2020-12-28
The following pull-request contains BPF updates for your *net* tree.
There is a small merge conflict between bpf tree commit 69ca310f34
("bpf: Save correct stopping point in file seq iteration") and net tree
commit 66ed594409 ("bpf/task_iter: In task_file_seq_get_next use
task_lookup_next_fd_rcu"). The get_files_struct() does not exist anymore
in net, so take the hunk in HEAD and add the `info->tid = curr_tid` to
the error path:
[...]
curr_task = task_seq_get_next(ns, &curr_tid, true);
if (!curr_task) {
info->task = NULL;
info->tid = curr_tid;
return NULL;
}
/* set info->task and info->tid */
[...]
We've added 10 non-merge commits during the last 9 day(s) which contain
a total of 11 files changed, 75 insertions(+), 20 deletions(-).
The main changes are:
1) Various AF_XDP fixes such as fill/completion ring leak on failed bind and
fixing a race in skb mode's backpressure mechanism, from Magnus Karlsson.
2) Fix latency spikes on lockdep enabled kernels by adding a rescheduling
point to BPF hashtab initialization, from Eric Dumazet.
3) Fix a splat in task iterator by saving the correct stopping point in the
seq file iteration, from Jonathan Lemon.
4) Fix BPF maps selftest by adding retries in case hashtab returns EBUSY
errors on update/deletes, from Andrii Nakryiko.
5) Fix BPF selftest error reporting to something more user friendly if the
vmlinux BTF cannot be found, from Kamal Mostafa.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Both version 0 and version 1 use ETH_P_ERSPAN, but version 0 does not
have an erspan header. So the check in gre_parse_header() is wrong,
we have to distinguish version 1 from version 0.
We can just check the gre header length like is_erspan_type1().
Fixes: cb73ee40b1 ("net: ip_gre: use erspan key field for tunnel lookup")
Reported-by: syzbot+f583ce3d4ddf9836b27a@syzkaller.appspotmail.com
Cc: William Tu <u9012063@gmail.com>
Cc: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Check Scell_log shift size in red_check_params() and modify all callers
of red_check_params() to pass Scell_log.
This prevents a shift out-of-bounds as detected by UBSAN:
UBSAN: shift-out-of-bounds in ./include/net/red.h:252:22
shift exponent 72 is too large for 32-bit type 'int'
Fixes: 8afa10cbe2 ("net_sched: red: Avoid illegal values")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: syzbot+97c5bd9cc81eca63d36e@syzkaller.appspotmail.com
Cc: Nogah Frankel <nogahf@mellanox.com>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Cc: netdev@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
pneigh_enqueue() tries to obtain a random delay by mod
NEIGH_VAR(p, PROXY_DELAY). However, NEIGH_VAR(p, PROXY_DELAY)
migth be zero at that point because someone could write zero
to /proc/sys/net/ipv4/neigh/[device]/proxy_delay after the
callers check it.
This patch uses prandom_u32_max() to get a random delay instead
which avoids potential division by zero.
Signed-off-by: weichenchen <weichen.chen@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
RT_TOS() only clears one of the ECN bits. Therefore, when
fib_compute_spec_dst() resorts to a fib lookup, it can return
different results depending on the value of the second ECN bit.
For example, ECT(0) and ECT(1) packets could be treated differently.
$ ip netns add ns0
$ ip netns add ns1
$ ip link add name veth01 netns ns0 type veth peer name veth10 netns ns1
$ ip -netns ns0 link set dev lo up
$ ip -netns ns1 link set dev lo up
$ ip -netns ns0 link set dev veth01 up
$ ip -netns ns1 link set dev veth10 up
$ ip -netns ns0 address add 192.0.2.10/24 dev veth01
$ ip -netns ns1 address add 192.0.2.11/24 dev veth10
$ ip -netns ns1 address add 192.0.2.21/32 dev lo
$ ip -netns ns1 route add 192.0.2.10/32 tos 4 dev veth10 src 192.0.2.21
$ ip netns exec ns1 sysctl -wq net.ipv4.icmp_echo_ignore_broadcasts=0
With TOS 4 and ECT(1), ns1 replies using source address 192.0.2.21
(ping uses -Q to set all TOS and ECN bits):
$ ip netns exec ns0 ping -c 1 -b -Q 5 192.0.2.255
[...]
64 bytes from 192.0.2.21: icmp_seq=1 ttl=64 time=0.544 ms
But with TOS 4 and ECT(0), ns1 replies using source address 192.0.2.11
because the "tos 4" route isn't matched:
$ ip netns exec ns0 ping -c 1 -b -Q 6 192.0.2.255
[...]
64 bytes from 192.0.2.11: icmp_seq=1 ttl=64 time=0.597 ms
After this patch the ECN bits don't affect the result anymore:
$ ip netns exec ns0 ping -c 1 -b -Q 6 192.0.2.255
[...]
64 bytes from 192.0.2.21: icmp_seq=1 ttl=64 time=0.591 ms
Fixes: 35ebf65e85 ("ipv4: Create and use fib_compute_spec_dst() helper.")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Accesses to dev->xps_rxqs_map (when using dev->num_tc) should be
protected by the rtnl lock, like we do for netif_set_xps_queue. I didn't
see an actual bug being triggered, but let's be safe here and take the
rtnl lock while accessing the map in sysfs.
Fixes: 8af2c06ff4 ("net-sysfs: Add interface for Rx queue(s) map per Tx queue")
Signed-off-by: Antoine Tenart <atenart@kernel.org>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Two race conditions can be triggered when storing xps rxqs, resulting in
various oops and invalid memory accesses:
1. Calling netdev_set_num_tc while netif_set_xps_queue:
- netif_set_xps_queue uses dev->tc_num as one of the parameters to
compute the size of new_dev_maps when allocating it. dev->tc_num is
also used to access the map, and the compiler may generate code to
retrieve this field multiple times in the function.
- netdev_set_num_tc sets dev->tc_num.
If new_dev_maps is allocated using dev->tc_num and then dev->tc_num
is set to a higher value through netdev_set_num_tc, later accesses to
new_dev_maps in netif_set_xps_queue could lead to accessing memory
outside of new_dev_maps; triggering an oops.
2. Calling netif_set_xps_queue while netdev_set_num_tc is running:
2.1. netdev_set_num_tc starts by resetting the xps queues,
dev->tc_num isn't updated yet.
2.2. netif_set_xps_queue is called, setting up the map with the
*old* dev->num_tc.
2.3. netdev_set_num_tc updates dev->tc_num.
2.4. Later accesses to the map lead to out of bound accesses and
oops.
A similar issue can be found with netdev_reset_tc.
One way of triggering this is to set an iface up (for which the driver
uses netdev_set_num_tc in the open path, such as bnx2x) and writing to
xps_rxqs in a concurrent thread. With the right timing an oops is
triggered.
Both issues have the same fix: netif_set_xps_queue, netdev_set_num_tc
and netdev_reset_tc should be mutually exclusive. We do that by taking
the rtnl lock in xps_rxqs_store.
Fixes: 8af2c06ff4 ("net-sysfs: Add interface for Rx queue(s) map per Tx queue")
Signed-off-by: Antoine Tenart <atenart@kernel.org>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Accesses to dev->xps_cpus_map (when using dev->num_tc) should be
protected by the rtnl lock, like we do for netif_set_xps_queue. I didn't
see an actual bug being triggered, but let's be safe here and take the
rtnl lock while accessing the map in sysfs.
Fixes: 184c449f91 ("net: Add support for XPS with QoS via traffic classes")
Signed-off-by: Antoine Tenart <atenart@kernel.org>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Two race conditions can be triggered when storing xps cpus, resulting in
various oops and invalid memory accesses:
1. Calling netdev_set_num_tc while netif_set_xps_queue:
- netif_set_xps_queue uses dev->tc_num as one of the parameters to
compute the size of new_dev_maps when allocating it. dev->tc_num is
also used to access the map, and the compiler may generate code to
retrieve this field multiple times in the function.
- netdev_set_num_tc sets dev->tc_num.
If new_dev_maps is allocated using dev->tc_num and then dev->tc_num
is set to a higher value through netdev_set_num_tc, later accesses to
new_dev_maps in netif_set_xps_queue could lead to accessing memory
outside of new_dev_maps; triggering an oops.
2. Calling netif_set_xps_queue while netdev_set_num_tc is running:
2.1. netdev_set_num_tc starts by resetting the xps queues,
dev->tc_num isn't updated yet.
2.2. netif_set_xps_queue is called, setting up the map with the
*old* dev->num_tc.
2.3. netdev_set_num_tc updates dev->tc_num.
2.4. Later accesses to the map lead to out of bound accesses and
oops.
A similar issue can be found with netdev_reset_tc.
One way of triggering this is to set an iface up (for which the driver
uses netdev_set_num_tc in the open path, such as bnx2x) and writing to
xps_cpus in a concurrent thread. With the right timing an oops is
triggered.
Both issues have the same fix: netif_set_xps_queue, netdev_set_num_tc
and netdev_reset_tc should be mutually exclusive. We do that by taking
the rtnl lock in xps_cpus_store.
Fixes: 184c449f91 ("net: Add support for XPS with QoS via traffic classes")
Signed-off-by: Antoine Tenart <atenart@kernel.org>
Reviewed-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
crypto_shash_setkey() and crypto_aead_setkey() will do a (small)
GFP_ATOMIC allocation to align the key if it isn't suitably aligned.
It's not a big deal, but at the same time easy to avoid.
The actual alignment requirement is dynamic, queryable with
crypto_shash_alignmask() and crypto_aead_alignmask(), but shouldn't
be stricter than 16 bytes for our algorithms.
Fixes: cd1a677cad ("libceph, ceph: implement msgr2.1 protocol (crc and secure modes)")
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
auth_signature frame is 68 bytes in plain mode and 96 bytes in
secure mode but we are requesting 68 bytes in both modes. By luck,
this doesn't actually result in any invalid memory accesses because
the allocation is satisfied out of kmalloc-96 slab and so exactly
96 bytes are allocated, but KASAN rightfully complains.
Fixes: cd1a677cad ("libceph, ceph: implement msgr2.1 protocol (crc and secure modes)")
Reported-by: Luis Henriques <lhenriques@suse.de>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
The set flag NFT_SET_EXPR provides a hint to the kernel that userspace
supports for multiple expressions per set element. In the same
direction, NFT_DYNSET_F_EXPR specifies that dynset expression defines
multiple expressions per set element.
This allows new userspace software with old kernels to bail out with
EOPNOTSUPP. This update is similar to ef516e8625 ("netfilter:
nf_tables: reintroduce the NFT_SET_CONCAT flag"). The NFT_SET_EXPR flag
needs to be set on when the NFTA_SET_EXPRESSIONS attribute is specified.
The NFT_SET_EXPR flag is not set on with NFTA_SET_EXPR to retain
backward compatibility in old userspace binaries.
Fixes: 48b0ae046e ("netfilter: nftables: netlink support for several set element expressions")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
If userspace requests a feature which is not available the original set
definition, then bail out with EOPNOTSUPP. If userspace sends
unsupported dynset flags (new feature not supported by this kernel),
then report EOPNOTSUPP to userspace. EINVAL should be only used to
report malformed netlink messages from userspace.
Fixes: 22fe54d5fe ("netfilter: nf_tables: add support for dynamic set updates")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
When aggregating ncsi interfaces and dedicated interfaces to bond
interfaces, the ncsi response handler will use the wrong net device to
find ncsi_dev, so that the ncsi interface will not work properly.
Here, we use the original net device to fix it.
Fixes: 138635cc27 ("net/ncsi: NCSI response packet handler")
Signed-off-by: John Wang <wangzhiqiang.bj@bytedance.com>
Link: https://lore.kernel.org/r/20201223055523.2069-1-wangzhiqiang.bj@bytedance.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
DCB uses the same handler function for both RTM_GETDCB and RTM_SETDCB
messages. dcb_doit() bounces RTM_SETDCB mesasges if the user does not have
the CAP_NET_ADMIN capability.
However, the operation to be performed is not decided from the DCB message
type, but from the DCB command. Thus DCB_CMD_*_GET commands are used for
reading DCB objects, the corresponding SET and DEL commands are used for
manipulation.
The assumption is that set-like commands will be sent via an RTM_SETDCB
message, and get-like ones via RTM_GETDCB. However, this assumption is not
enforced.
It is therefore possible to manipulate DCB objects without CAP_NET_ADMIN
capability by sending the corresponding command in an RTM_GETDCB message.
That is a bug. Fix it by validating the type of the request message against
the type used for the response.
Fixes: 2f90b8657e ("ixgbe: this patch adds support for DCB to the kernel and ixgbe driver")
Signed-off-by: Petr Machata <me@pmachata.org>
Link: https://lore.kernel.org/r/a2a9b88418f3a58ef211b718f2970128ef9e3793.1608673640.git.me@pmachata.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
- fix long-standing limitation on open-unlink-fop pattern
- add refcount to p9_fid (fixes the above and will allow for more
cleanups and simplifications in the future)
-----BEGIN PGP SIGNATURE-----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=DKlc
-----END PGP SIGNATURE-----
Merge tag '9p-for-5.11-rc1' of git://github.com/martinetd/linux
Pull 9p update from Dominique Martinet:
- fix long-standing limitation on open-unlink-fop pattern
- add refcount to p9_fid (fixes the above and will allow for more
cleanups and simplifications in the future)
* tag '9p-for-5.11-rc1' of git://github.com/martinetd/linux:
9p: Remove unnecessary IS_ERR() check
9p: Uninitialized variable in v9fs_writeback_fid()
9p: Fix writeback fid incorrectly being attached to dentry
9p: apply review requests for fid refcounting
9p: add refcount to p9_fid struct
fs/9p: search open fids first
fs/9p: track open fids
fs/9p: fix create-unlink-getattr idiom
Pablo Neira Ayuso says:
====================
Netfilter fixes for net
1) Incorrect loop in error path of nft_set_elem_expr_clone(),
from Colin Ian King.
2) Missing xt_table_get_private_protected() to access table
private data in x_tables, from Subash Abhinov Kasiviswanathan.
3) Possible oops in ipset hash type resize, from Vasily Averin.
4) Fix shift-out-of-bounds in ipset hash type, also from Vasily.
* git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf:
netfilter: ipset: fix shift-out-of-bounds in htable_bits()
netfilter: ipset: fixes possible oops in mtype_resize
netfilter: x_tables: Update remaining dereference to RCU
netfilter: nftables: fix incorrect increment of loop counter
====================
Link: https://lore.kernel.org/r/20201218120409.3659-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
taprio_graft() can insert a NULL element in the array of child qdiscs. As
a consquence, taprio_reset() might not reset child qdiscs completely, and
taprio_destroy() might leak resources. Fix it by ensuring that loops that
iterate over q->qdiscs[] don't end when they find the first NULL item.
Fixes: 44d4775ca5 ("net/sched: sch_taprio: reset child qdiscs before freeing them")
Fixes: 5a781ccbd1 ("tc: Add support for configuring the taprio scheduler")
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Link: https://lore.kernel.org/r/13edef6778fef03adc751582562fba4a13e06d6a.1608240532.git.dcaratti@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
On 64-bit systems the packet procfs header field names following 'sk'
are not aligned correctly:
sk RefCnt Type Proto Iface R Rmem User Inode
00000000605d2c64 3 3 0003 7 1 450880 0 16643
00000000080e9b80 2 2 0000 0 0 0 0 17404
00000000b23b8a00 2 2 0000 0 0 0 0 17421
...
With this change field names are correctly aligned:
sk RefCnt Type Proto Iface R Rmem User Inode
000000005c3b1d97 3 3 0003 7 1 21568 0 16178
000000007be55bb7 3 3 fbce 8 1 0 0 16250
00000000be62127d 3 3 fbcd 8 1 0 0 16254
...
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Link: https://lore.kernel.org/r/54917251d8433735d9a24e935a6cb8eb88b4058a.1608103684.git.baruch@tkos.co.il
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Daire Byrne reports a ~50% aggregrate throughput regression on his
Linux NFS server after commit da1661b93b ("SUNRPC: Teach server to
use xprt_sock_sendmsg for socket sends"), which replaced
kernel_send_page() calls in NFSD's socket send path with calls to
sock_sendmsg() using iov_iter.
Investigation showed that tcp_sendmsg() was not using zero-copy to
send the xdr_buf's bvec pages, but instead was relying on memcpy.
This means copying every byte of a large NFS READ payload.
It looks like TLS sockets do indeed support a ->sendpage method,
so it's really not necessary to use xprt_sock_sendmsg() to support
TLS fully on the server. A mechanical reversion of da1661b93b is
not possible at this point, but we can re-implement the server's
TCP socket sendmsg path using kernel_sendpage().
Reported-by: Daire Byrne <daire@dneg.com>
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=209439
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Rollback the reservation in the completion ring when we get a
NETDEV_TX_BUSY. When this error is received from the driver, we are
supposed to let the user application retry the transmit again. And in
order to do this, we need to roll back the failed send so it can be
retried. Unfortunately, we did not cancel the reservation we had made
in the completion ring. By not doing this, we actually make the
completion ring one entry smaller per NETDEV_TX_BUSY error we get, and
after enough of these errors the completion ring will be of size zero
and transmit will stop working.
Fix this by cancelling the reservation when we get a NETDEV_TX_BUSY
error.
Fixes: 642e450b6b ("xsk: Do not discard packet when NETDEV_TX_BUSY")
Reported-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Link: https://lore.kernel.org/bpf/20201218134525.13119-3-magnus.karlsson@gmail.com
Fix a race when multiple sockets are simultaneously calling sendto()
when the completion ring is shared in the SKB case. This is the case
when you share the same netdev and queue id through the
XDP_SHARED_UMEM bind flag. The problem is that multiple processes can
be in xsk_generic_xmit() and call the backpressure mechanism in
xskq_prod_reserve(xs->pool->cq). As this is a shared resource in this
specific scenario, a race might occur since the rings are
single-producer single-consumer.
Fix this by moving the tx_completion_lock from the socket to the pool
as the pool is shared between the sockets that share the completion
ring. (The pool is not shared when this is not the case.) And then
protect the accesses to xskq_prod_reserve() with this lock. The
tx_completion_lock is renamed cq_lock to better reflect that it
protects accesses to the potentially shared completion ring.
Fixes: 35fcde7f8d ("xsk: support for Tx")
Reported-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Link: https://lore.kernel.org/bpf/20201218134525.13119-2-magnus.karlsson@gmail.com
Fix a possible memory leak when a bind of an AF_XDP socket fails. When
the fill and completion rings are created, they are tied to the
socket. But when the buffer pool is later created at bind time, the
ownership of these two rings are transferred to the buffer pool as
they might be shared between sockets (and the buffer pool cannot be
created until we know what we are binding to). So, before the buffer
pool is created, these two rings are cleaned up with the socket, and
after they have been transferred they are cleaned up together with
the buffer pool.
The problem is that ownership was transferred before it was absolutely
certain that the buffer pool could be created and initialized
correctly and when one of these errors occurred, the fill and
completion rings did neither belong to the socket nor the pool and
where therefore leaked. Solve this by moving the ownership transfer
to the point where the buffer pool has been completely set up and
there is no way it can fail.
Fixes: 7361f9c3d7 ("xsk: Move fill and completion rings to buffer pool")
Reported-by: syzbot+cfa88ddd0655afa88763@syzkaller.appspotmail.com
Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Björn Töpel <bjorn.topel@intel.com>
Link: https://lore.kernel.org/bpf/20201214085127.3960-1-magnus.karlsson@gmail.com
Current release - always broken:
- net/smc: fix access to parent of an ib device
- devlink: use _BITUL() macro instead of BIT() in the UAPI header
- handful of mptcp fixes
Previous release - regressions:
- intel: AF_XDP: clear the status bits for the next_to_use descriptor
- dpaa2-eth: fix the size of the mapped SGT buffer
Previous release - always broken:
- mptcp: fix security context on server socket
- ethtool: fix string set id check
- ethtool: fix error paths in ethnl_set_channels()
- lan743x: fix rx_napi_poll/interrupt ping-pong
- qca: ar9331: fix sleeping function called from invalid context bug
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=nTjM
-----END PGP SIGNATURE-----
Merge tag 'net-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes from Jakub Kicinski:
"Current release - always broken:
- net/smc: fix access to parent of an ib device
- devlink: use _BITUL() macro instead of BIT() in the UAPI header
- handful of mptcp fixes
Previous release - regressions:
- intel: AF_XDP: clear the status bits for the next_to_use descriptor
- dpaa2-eth: fix the size of the mapped SGT buffer
Previous release - always broken:
- mptcp: fix security context on server socket
- ethtool: fix string set id check
- ethtool: fix error paths in ethnl_set_channels()
- lan743x: fix rx_napi_poll/interrupt ping-pong
- qca: ar9331: fix sleeping function called from invalid context bug"
* tag 'net-5.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (32 commits)
net/sched: sch_taprio: reset child qdiscs before freeing them
nfp: move indirect block cleanup to flower app stop callback
octeontx2-af: Fix undetected unmap PF error check
net: nixge: fix spelling mistake in Kconfig: "Instuments" -> "Instruments"
qlcnic: Fix error code in probe
mptcp: fix pending data accounting
mptcp: push pending frames when subflow has free space
mptcp: properly annotate nested lock
mptcp: fix security context on server socket
net/mlx5: Fix compilation warning for 32-bit platform
mptcp: clear use_ack and use_map when dropping other suboptions
devlink: use _BITUL() macro instead of BIT() in the UAPI header
net: korina: fix return value
net/smc: fix access to parent of an ib device
ethtool: fix error paths in ethnl_set_channels()
nfc: s3fwrn5: Remove unused NCI prop commands
nfc: s3fwrn5: Remove the delay for NFC sleep
phy: fix kdoc warning
tipc: do sanity check payload of a netlink message
use __netdev_notify_peers in hyperv
...
Highlights include:
Features:
- NFSv3: Add emulation of lookupp() to improve open_by_filehandle()
support.
- A series of patches to improve readdir performance, particularly with
large directories.
- Basic support for using NFS/RDMA with the pNFS files and flexfiles
drivers.
- Micro-optimisations for RDMA.
- RDMA tracing improvements.
Bugfixes:
- Fix a long standing bug with xs_read_xdr_buf() when receiving partial
pages (Dan Aloni).
- Various fixes for getxattr and listxattr, when used over non-TCP
transports.
- Fixes for containerised NFS from Sargun Dhillon.
- switch nfsiod to be an UNBOUND workqueue (Neil Brown).
- READDIR should not ask for security label information if there is no
LSM policy. (Olga Kornievskaia)
- Avoid using interval-based rebinding with TCP in lockd (Calum Mackay).
- A series of RPC and NFS layer fixes to support the NFSv4.2 READ_PLUS code.
- A couple of fixes for pnfs/flexfiles read failover
Cleanups:
- Various cleanups for the SUNRPC xdr code in conjunction with the
READ_PLUS fixes.
-----BEGIN PGP SIGNATURE-----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=IKWG
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-5.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client updates from Trond Myklebust:
"Highlights include:
Features:
- NFSv3: Add emulation of lookupp() to improve open_by_filehandle()
support
- A series of patches to improve readdir performance, particularly
with large directories
- Basic support for using NFS/RDMA with the pNFS files and flexfiles
drivers
- Micro-optimisations for RDMA
- RDMA tracing improvements
Bugfixes:
- Fix a long standing bug with xs_read_xdr_buf() when receiving
partial pages (Dan Aloni)
- Various fixes for getxattr and listxattr, when used over non-TCP
transports
- Fixes for containerised NFS from Sargun Dhillon
- switch nfsiod to be an UNBOUND workqueue (Neil Brown)
- READDIR should not ask for security label information if there is
no LSM policy (Olga Kornievskaia)
- Avoid using interval-based rebinding with TCP in lockd (Calum
Mackay)
- A series of RPC and NFS layer fixes to support the NFSv4.2
READ_PLUS code
- A couple of fixes for pnfs/flexfiles read failover
Cleanups:
- Various cleanups for the SUNRPC xdr code in conjunction with the
READ_PLUS fixes"
* tag 'nfs-for-5.11-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (90 commits)
NFS/pNFS: Fix a typo in ff_layout_resend_pnfs_read()
pNFS/flexfiles: Avoid spurious layout returns in ff_layout_choose_ds_for_read
NFSv4/pnfs: Add tracing for the deviceid cache
fs/lockd: convert comma to semicolon
NFSv4.2: fix error return on memory allocation failure
NFSv4.2/pnfs: Don't use READ_PLUS with pNFS yet
NFSv4.2: Deal with potential READ_PLUS data extent buffer overflow
NFSv4.2: Don't error when exiting early on a READ_PLUS buffer overflow
NFSv4.2: Handle hole lengths that exceed the READ_PLUS read buffer
NFSv4.2: decode_read_plus_hole() needs to check the extent offset
NFSv4.2: decode_read_plus_data() must skip padding after data segment
NFSv4.2: Ensure we always reset the result->count in decode_read_plus()
SUNRPC: When expanding the buffer, we may need grow the sparse pages
SUNRPC: Cleanup - constify a number of xdr_buf helpers
SUNRPC: Clean up open coded setting of the xdr_stream 'nwords' field
SUNRPC: _copy_to/from_pages() now check for zero length
SUNRPC: Cleanup xdr_shrink_bufhead()
SUNRPC: Fix xdr_expand_hole()
SUNRPC: Fixes for xdr_align_data()
SUNRPC: _shift_data_left/right_pages should check the shift length
...
adds the option of full in-transit encryption using AES-GCM algorithm
(myself). On top of that we have a series to avoid intermittent
errors during recovery with recover_session=clean and some MDS request
encoding work from Jeff, a cap handling fix and assorted observability
improvements from Luis and Xiubo and a good number of cleanups. Luis
also ran into a corner case with quotas which sadly means that we are
back to denying cross-quota-realm renames.
-----BEGIN PGP SIGNATURE-----
iQFHBAABCAAxFiEEydHwtzie9C7TfviiSn/eOAIR84sFAl/beWITHGlkcnlvbW92
QGdtYWlsLmNvbQAKCRBKf944AhHzi4i0CACnvd87l2n7dndig7p5d5lVsmo8tAFs
wHYHaIVisWKMcqKoT+YJajSgzaonxjzvYiyCzwLxV7s7vI7cswAwjEfYT7tTDRp2
pnO1+4N/1ftznnTk/1QdqwOQLUg5UtdgWvFCaXQF+Vr/YroZomKJPaK8fXK882pC
9FBjoLNy1HWySsoXPCxJktmDzpEEyYRNJg0vquxm7mxwTgQErupWlwEFjNg5LBkm
gC0UoKhCE3DeUrXnoq21Ga62RIajxHofTooNx7dg+JiSVgluW+nORaWDYJXNzwLC
j5puSe4pWIah+gmcwIFuyNz4ddkvVL4URvsYPGkVFYXlEefQjErc10Jh
=6b9f
-----END PGP SIGNATURE-----
Merge tag 'ceph-for-5.11-rc1' of git://github.com/ceph/ceph-client
Pull ceph updates from Ilya Dryomov:
"The big ticket item here is support for msgr2 on-wire protocol, which
adds the option of full in-transit encryption using AES-GCM algorithm
(myself).
On top of that we have a series to avoid intermittent errors during
recovery with recover_session=clean and some MDS request encoding work
from Jeff, a cap handling fix and assorted observability improvements
from Luis and Xiubo and a good number of cleanups.
Luis also ran into a corner case with quotas which sadly means that we
are back to denying cross-quota-realm renames"
* tag 'ceph-for-5.11-rc1' of git://github.com/ceph/ceph-client: (59 commits)
libceph: drop ceph_auth_{create,update}_authorizer()
libceph, ceph: make use of __ceph_auth_get_authorizer() in msgr1
libceph, ceph: implement msgr2.1 protocol (crc and secure modes)
libceph: introduce connection modes and ms_mode option
libceph, rbd: ignore addr->type while comparing in some cases
libceph, ceph: get and handle cluster maps with addrvecs
libceph: factor out finish_auth()
libceph: drop ac->ops->name field
libceph: amend cephx init_protocol() and build_request()
libceph, ceph: incorporate nautilus cephx changes
libceph: safer en/decoding of cephx requests and replies
libceph: more insight into ticket expiry and invalidation
libceph: move msgr1 protocol specific fields to its own struct
libceph: move msgr1 protocol implementation to its own file
libceph: separate msgr1 protocol implementation
libceph: export remaining protocol independent infrastructure
libceph: export zero_page
libceph: rename and export con->flags bits
libceph: rename and export con->state states
libceph: make con->state an int
...
htable_bits() can call jhash_size(32) and trigger shift-out-of-bounds
UBSAN: shift-out-of-bounds in net/netfilter/ipset/ip_set_hash_gen.h:151:6
shift exponent 32 is too large for 32-bit type 'unsigned int'
CPU: 0 PID: 8498 Comm: syz-executor519
Not tainted 5.10.0-rc7-next-20201208-syzkaller #0
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0x107/0x163 lib/dump_stack.c:120
ubsan_epilogue+0xb/0x5a lib/ubsan.c:148
__ubsan_handle_shift_out_of_bounds.cold+0xb1/0x181 lib/ubsan.c:395
htable_bits net/netfilter/ipset/ip_set_hash_gen.h:151 [inline]
hash_mac_create.cold+0x58/0x9b net/netfilter/ipset/ip_set_hash_gen.h:1524
ip_set_create+0x610/0x1380 net/netfilter/ipset/ip_set_core.c:1115
nfnetlink_rcv_msg+0xecc/0x1180 net/netfilter/nfnetlink.c:252
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494
nfnetlink_rcv+0x1ac/0x420 net/netfilter/nfnetlink.c:600
netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330
netlink_sendmsg+0x907/0xe40 net/netlink/af_netlink.c:1919
sock_sendmsg_nosec net/socket.c:652 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:672
____sys_sendmsg+0x6e8/0x810 net/socket.c:2345
___sys_sendmsg+0xf3/0x170 net/socket.c:2399
__sys_sendmsg+0xe5/0x1b0 net/socket.c:2432
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
This patch replaces htable_bits() by simple fls(hashsize - 1) call:
it alone returns valid nbits both for round and non-round hashsizes.
It is normal to set any nbits here because it is validated inside
following htable_size() call which returns 0 for nbits>31.
Fixes: 1feab10d7e6d("netfilter: ipset: Unified hash type generation")
Reported-by: syzbot+d66bfadebca46cf61a2b@syzkaller.appspotmail.com
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Acked-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
currently mtype_resize() can cause oops
t = ip_set_alloc(htable_size(htable_bits));
if (!t) {
ret = -ENOMEM;
goto out;
}
t->hregion = ip_set_alloc(ahash_sizeof_regions(htable_bits));
Increased htable_bits can force htable_size() to return 0.
In own turn ip_set_alloc(0) returns not 0 but ZERO_SIZE_PTR,
so follwoing access to t->hregion should trigger an OOPS.
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Acked-by: Jozsef Kadlecsik <kadlec@netfilter.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This fixes the dereference to fetch the RCU pointer when holding
the appropriate xtables lock.
Reported-by: kernel test robot <lkp@intel.com>
Fixes: cc00bcaa58 ("netfilter: x_tables: Switch synchronization to RCU")
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
When sendmsg() needs to wait for memory, the pending data
is not updated. That causes a drift in forward memory allocation,
leading to stall and/or warnings at socket close time.
This change addresses the above issue moving the pending data
counter update inside the sendmsg() main loop.
Fixes: 6e628cd3a8 ("mptcp: use mptcp release_cb for delayed tasks")
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When multiple subflows are active, we can receive a
window update on subflow with no write space available.
MPTCP will try to push frames on such subflow and will
fail. Pending frames will be pushed only after receiving
a window update on a subflow with some wspace available.
Overall the above could lead to suboptimal aggregate
bandwidth usage.
Instead, we should try to push pending frames as soon as
the subflow reaches both conditions mentioned above.
We can finally enable self-tests with asymmetric links,
as the above makes them finally pass.
Fixes: 6f8a612a33 ("mptcp: keep track of advertised windows right edge")
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
MPTCP closes the subflows while holding the msk-level lock.
While acquiring the subflow socket lock we need to use the
correct nested annotation, or we can hit a lockdep splat
at runtime.
Reported-and-tested-by: Geliang Tang <geliangtang@gmail.com>
Fixes: e16163b6e2 ("mptcp: refactor shutdown and close")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Currently MPTCP is not propagating the security context
from the ingress request socket to newly created msk
at clone time.
Address the issue invoking the missing security helper.
Fixes: cf7da0d66c ("mptcp: Create SUBFLOW socket for incoming connections")
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
A smaller set of patches, nothing stands out as being particularly major
this cycle:
- Driver bug fixes and updates: bnxt_re, cxgb4, rxe, hns, i40iw, cxgb4,
mlx4 and mlx5
- Bug fixes and polishing for the new rts ULP
- Cleanup of uverbs checking for allowed driver operations
- Use sysfs_emit all over the place
- Lots of bug fixes and clarity improvements for hns
- hip09 support for hns
- NDR and 50/100Gb signaling rates
- Remove dma_virt_ops and go back to using the IB DMA wrappers
- mlx5 optimizations for contiguous DMA regions
-----BEGIN PGP SIGNATURE-----
iQIzBAABCgAdFiEEfB7FMLh+8QxL+6i3OG33FX4gmxoFAl/aNXUACgkQOG33FX4g
mxqlMQ/+O6UhxKnDAnMB+HzDGvOm+KXNHOQBuzxz4ZWXqtUrW8WU5ca3PhXovc4z
/QX0HhMhQmVsva5mjp1OGVATxQ2E+yasqFLg4QXAFWFR3N7s0u/sikE9i1DoPvOC
lsmLTeRauCFaE4mJD5nvYwm+riECX0GmyVVW7v6V05xwAp0hwdhyU7Kb6Yh3lxsE
umTz+onPNJcD6Tc4snziyC5QEp5ebEjAaj4dVI1YPR5X0c2RwC5E1CIDI6u4OQ2k
j7/+Kvo8LNdYNERGiR169x6c1L7WS6dYnGMMeXRgyy0BVbVdRGDnvCV9VRmF66w5
99fHfDjNMNmqbGNt/4/gwNdVrR9aI4jMZWCh7SmsguX6XwNOlhYldy3x3WnlkfkQ
e4O0huJceJqcB2Uya70GqufnAetRXsbjzcvWxpR5YAwRmcRkm1f6aGK3BxPjWEbr
BbYRpiKMxxT4yTe65BuuThzx6g4pNQHe0z3BM/dzMJQAX+PZcs1CPQR8F8PbCrZR
Ad7qw4HJ587PoSxPi3toVMpYZRP6cISh1zx9q/JCj8cxH9Ri4MovUCS3cF63Ny3B
1LJ2q0x8FuLLjgZJogKUyEkS8OO6q7NL8WumjvrYWWx19+jcYsV81jTRGSkH3bfY
F7Esv5K2T1F2gVsCe1ZFFplQg6ja1afIcc+LEl8cMJSyTdoSub4=
=9t8b
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Pull rdma updates from Jason Gunthorpe:
"A smaller set of patches, nothing stands out as being particularly
major this cycle. The biggest item would be the new HIP09 HW support
from HNS, otherwise it was pretty quiet for new work here:
- Driver bug fixes and updates: bnxt_re, cxgb4, rxe, hns, i40iw,
cxgb4, mlx4 and mlx5
- Bug fixes and polishing for the new rts ULP
- Cleanup of uverbs checking for allowed driver operations
- Use sysfs_emit all over the place
- Lots of bug fixes and clarity improvements for hns
- hip09 support for hns
- NDR and 50/100Gb signaling rates
- Remove dma_virt_ops and go back to using the IB DMA wrappers
- mlx5 optimizations for contiguous DMA regions"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (147 commits)
RDMA/cma: Don't overwrite sgid_attr after device is released
RDMA/mlx5: Fix MR cache memory leak
RDMA/rxe: Use acquire/release for memory ordering
RDMA/hns: Simplify AEQE process for different types of queue
RDMA/hns: Fix inaccurate prints
RDMA/hns: Fix incorrect symbol types
RDMA/hns: Clear redundant variable initialization
RDMA/hns: Fix coding style issues
RDMA/hns: Remove unnecessary access right set during INIT2INIT
RDMA/hns: WARN_ON if get a reserved sl from users
RDMA/hns: Avoid filling sl in high 3 bits of vlan_id
RDMA/hns: Do shift on traffic class when using RoCEv2
RDMA/hns: Normalization the judgment of some features
RDMA/hns: Limit the length of data copied between kernel and userspace
RDMA/mlx4: Remove bogus dev_base_lock usage
RDMA/uverbs: Fix incorrect variable type
RDMA/core: Do not indicate device ready when device enablement fails
RDMA/core: Clean up cq pool mechanism
RDMA/core: Update kernel documentation for ib_create_named_qp()
MAINTAINERS: SOFT-ROCE: Change Zhu Yanjun's email address
...
The parent of an ib device is used to retrieve the PCI device
attributes. It turns out that there are possible cases when an ib device
has no parent set in the device structure, which may lead to page
faults when trying to access this memory.
Fix that by checking the parent pointer and consolidate the pci device
specific processing in a new function.
Fixes: a3db10efcc ("net/smc: Add support for obtaining SMCR device list")
Reported-by: syzbot+600fef7c414ee7e2d71b@syzkaller.appspotmail.com
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Link: https://lore.kernel.org/r/20201215091058.49354-2-kgraul@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Fix two error paths in ethnl_set_channels() to avoid lock-up caused
but unreleased RTNL.
Fixes: e19c591eaf ("ethtool: set device channel counts with CHANNELS_SET request")
Reported-by: LiLiang <liali@redhat.com>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Link: https://lore.kernel.org/r/20201215090810.801777-1-ivecera@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When we initialize nlmsghdr with no payload inside tipc_nl_compat_dumpit()
the parsing function returns -EINVAL. We fix it by making the parsing call
conditional.
Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: Hoang Le <hoang.h.le@dektech.com.au>
Link: https://lore.kernel.org/r/20201215033151.76139-1-hoang.h.le@dektech.com.au
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=ly9V
-----END PGP SIGNATURE-----
Merge tag 'for-5.11/io_uring-2020-12-14' of git://git.kernel.dk/linux-block
Pull io_uring updates from Jens Axboe:
"Fairly light set of changes this time around, and mostly some bits
that were pushed out to 5.11 instead of 5.10, fixes/cleanups, and a
few features. In particular:
- Cleanups around iovec import (David Laight, Pavel)
- Add timeout support for io_uring_enter(2), which enables us to
clean up liburing and avoid a timeout sqe submission in the
completion path.
The big win here is that it allows setups that split SQ and CQ
handling into separate threads to avoid locking, as the CQ side
will no longer submit when timeouts are needed when waiting for
events (Hao Xu)
- Add support for socket shutdown, and renameat/unlinkat.
- SQPOLL cleanups and improvements (Xiaoguang Wang)
- Allow SQPOLL setups for CAP_SYS_NICE, and enable regular
(non-fixed) files to be used.
- Cancelation improvements (Pavel)
- Fixed file reference improvements (Pavel)
- IOPOLL related race fixes (Pavel)
- Lots of other little fixes and cleanups (mostly Pavel)"
* tag 'for-5.11/io_uring-2020-12-14' of git://git.kernel.dk/linux-block: (43 commits)
io_uring: fix io_cqring_events()'s noflush
io_uring: fix racy IOPOLL flush overflow
io_uring: fix racy IOPOLL completions
io_uring: always let io_iopoll_complete() complete polled io
io_uring: add timeout update
io_uring: restructure io_timeout_cancel()
io_uring: fix files cancellation
io_uring: use bottom half safe lock for fixed file data
io_uring: fix miscounting ios_left
io_uring: change submit file state invariant
io_uring: check kthread stopped flag when sq thread is unparked
io_uring: share fixed_file_refs b/w multiple rsrcs
io_uring: replace inflight_wait with tctx->wait
io_uring: don't take fs for recvmsg/sendmsg
io_uring: only wake up sq thread while current task is in io worker context
io_uring: don't acquire uring_lock twice
io_uring: initialize 'timeout' properly in io_sq_thread()
io_uring: refactor io_sq_thread() handling
io_uring: always batch cancel in *cancel_files()
io_uring: pass files into kill timeouts/poll
...
There are some use cases for netdev_notify_peers in the context
when rtnl lock is already held. Introduce lockless version
of netdev_notify_peers call to save the extra code to call
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, dev);
call_netdevice_notifiers(NETDEV_RESEND_IGMP, dev);
After that, convert netdev_notify_peers to call the new helper.
Suggested-by: Nathan Lynch <nathanl@linux.ibm.com>
Signed-off-by: Lijun Pan <ljp@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=6Cqb
-----END PGP SIGNATURE-----
Merge tag 'selinux-pr-20201214' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux
Pull selinux updates from Paul Moore:
"While we have a small number of SELinux patches for v5.11, there are a
few changes worth highlighting:
- Change the LSM network hooks to pass flowi_common structs instead
of the parent flowi struct as the LSMs do not currently need the
full flowi struct and they do not have enough information to use it
safely (missing information on the address family).
This patch was discussed both with Herbert Xu (representing team
netdev) and James Morris (representing team
LSMs-other-than-SELinux).
- Fix how we handle errors in inode_doinit_with_dentry() so that we
attempt to properly label the inode on following lookups instead of
continuing to treat it as unlabeled.
- Tweak the kernel logic around allowx, auditallowx, and dontauditx
SELinux policy statements such that the auditx/dontauditx are
effective even without the allowx statement.
Everything passes our test suite"
* tag 'selinux-pr-20201214' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
lsm,selinux: pass flowi_common instead of flowi to the LSM hooks
selinux: Fix fall-through warnings for Clang
selinux: drop super_block backpointer from superblock_security_struct
selinux: fix inode_doinit_with_dentry() LABEL_INVALID error handling
selinux: allow dontauditx and auditallowx rules to take effect without allowx
selinux: fix error initialization in inode_doinit_with_dentry()
The intention of the err_expr cleanup path is to iterate over the
allocated expr_array objects and free them, starting from i - 1 and
working down to the start of the array. Currently the loop counter
is being incremented instead of decremented and also the index i is
being used instead of k, repeatedly destroying the same expr_array
element. Fix this by decrementing k and using k as the index into
expr_array.
Addresses-Coverity: ("Infinite loop")
Fixes: 8cfd9b0f85 ("netfilter: nftables: generalize set expressions support")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
- Improve support for re-exporting NFS mounts
- Replace NFSv4 XDR decoding C macros with xdr_stream helpers
- Support for multiple RPC/RDMA chunks per RPC transaction
-----BEGIN PGP SIGNATURE-----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=1uP3
-----END PGP SIGNATURE-----
Merge tag 'nfsd-5.11' of git://git.linux-nfs.org/projects/cel/cel-2.6
Pull nfsd updates from Chuck Lever:
"Several substantial changes this time around:
- Previously, exporting an NFS mount via NFSD was considered to be an
unsupported feature. With v5.11, the community has attempted to
make re-exporting a first-class feature of NFSD.
This would enable the Linux in-kernel NFS server to be used as an
intermediate cache for a remotely-located primary NFS server, for
example, even with other NFS server implementations, like a NetApp
filer, as the primary.
- A short series of patches brings support for multiple RPC/RDMA data
chunks per RPC transaction to the Linux NFS server's RPC/RDMA
transport implementation.
This is a part of the RPC/RDMA spec that the other premiere
NFS/RDMA implementation (Solaris) has had for a very long time, and
completes the implementation of RPC/RDMA version 1 in the Linux
kernel's NFS server.
- Long ago, NFSv4 support was introduced to NFSD using a series of C
macros that hid dprintk's and goto's. Over time, the kernel's XDR
implementation has been greatly improved, but these C macros have
remained and become fallow. A series of patches in this pull
request completely replaces those macros with the use of current
kernel XDR infrastructure. Benefits include:
- More robust input sanitization in NFSD's NFSv4 XDR decoders.
- Make it easier to use common kernel library functions that use
XDR stream APIs (for example, GSS-API).
- Align the structure of the source code with the RFCs so it is
easier to learn, verify, and maintain our XDR implementation.
- Removal of more than a hundred hidden dprintk() call sites.
- Removal of some explicit manipulation of pages to help make the
eventual transition to xdr->bvec smoother.
- On top of several related fixes in 5.10-rc, there are a few more
fixes to get the Linux NFSD implementation of NFSv4.2 inter-server
copy up to speed.
And as usual, there is a pinch of seasoning in the form of a
collection of unrelated minor bug fixes and clean-ups.
Many thanks to all who contributed this time around!"
* tag 'nfsd-5.11' of git://git.linux-nfs.org/projects/cel/cel-2.6: (131 commits)
nfsd: Record NFSv4 pre/post-op attributes as non-atomic
nfsd: Set PF_LOCAL_THROTTLE on local filesystems only
nfsd: Fix up nfsd to ensure that timeout errors don't result in ESTALE
exportfs: Add a function to return the raw output from fh_to_dentry()
nfsd: close cached files prior to a REMOVE or RENAME that would replace target
nfsd: allow filesystems to opt out of subtree checking
nfsd: add a new EXPORT_OP_NOWCC flag to struct export_operations
Revert "nfsd4: support change_attr_type attribute"
nfsd4: don't query change attribute in v2/v3 case
nfsd: minor nfsd4_change_attribute cleanup
nfsd: simplify nfsd4_change_info
nfsd: only call inode_query_iversion in the I_VERSION case
nfs_common: need lock during iterate through the list
NFSD: Fix 5 seconds delay when doing inter server copy
NFSD: Fix sparse warning in nfs4proc.c
SUNRPC: Remove XDRBUF_SPARSE_PAGES flag in gss_proxy upcall
sunrpc: clean-up cache downcall
nfsd: Fix message level for normal termination
NFSD: Remove macros that are no longer used
NFSD: Replace READ* macros in nfsd4_decode_compound()
...
Core:
- support "prefer busy polling" NAPI operation mode, where we defer softirq
for some time expecting applications to periodically busy poll
- AF_XDP: improve efficiency by more batching and hindering
the adjacency cache prefetcher
- af_packet: make packet_fanout.arr size configurable up to 64K
- tcp: optimize TCP zero copy receive in presence of partial or unaligned
reads making zero copy a performance win for much smaller messages
- XDP: add bulk APIs for returning / freeing frames
- sched: support fragmenting IP packets as they come out of conntrack
- net: allow virtual netdevs to forward UDP L4 and fraglist GSO skbs
BPF:
- BPF switch from crude rlimit-based to memcg-based memory accounting
- BPF type format information for kernel modules and related tracing
enhancements
- BPF implement task local storage for BPF LSM
- allow the FENTRY/FEXIT/RAW_TP tracing programs to use bpf_sk_storage
Protocols:
- mptcp: improve multiple xmit streams support, memory accounting and
many smaller improvements
- TLS: support CHACHA20-POLY1305 cipher
- seg6: add support for SRv6 End.DT4/DT6 behavior
- sctp: Implement RFC 6951: UDP Encapsulation of SCTP
- ppp_generic: add ability to bridge channels directly
- bridge: Connectivity Fault Management (CFM) support as is defined in
IEEE 802.1Q section 12.14.
Drivers:
- mlx5: make use of the new auxiliary bus to organize the driver internals
- mlx5: more accurate port TX timestamping support
- mlxsw:
- improve the efficiency of offloaded next hop updates by using
the new nexthop object API
- support blackhole nexthops
- support IEEE 802.1ad (Q-in-Q) bridging
- rtw88: major bluetooth co-existance improvements
- iwlwifi: support new 6 GHz frequency band
- ath11k: Fast Initial Link Setup (FILS)
- mt7915: dual band concurrent (DBDC) support
- net: ipa: add basic support for IPA v4.5
Refactor:
- a few pieces of in_interrupt() cleanup work from Sebastian Andrzej Siewior
- phy: add support for shared interrupts; get rid of multiple driver
APIs and have the drivers write a full IRQ handler, slight growth
of driver code should be compensated by the simpler API which
also allows shared IRQs
- add common code for handling netdev per-cpu counters
- move TX packet re-allocation from Ethernet switch tag drivers to
a central place
- improve efficiency and rename nla_strlcpy
- number of W=1 warning cleanups as we now catch those in a patchwork
build bot
Old code removal:
- wan: delete the DLCI / SDLA drivers
- wimax: move to staging
- wifi: remove old WDS wifi bridging support
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=GXs1
-----END PGP SIGNATURE-----
Merge tag 'net-next-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Jakub Kicinski:
"Core:
- support "prefer busy polling" NAPI operation mode, where we defer
softirq for some time expecting applications to periodically busy
poll
- AF_XDP: improve efficiency by more batching and hindering the
adjacency cache prefetcher
- af_packet: make packet_fanout.arr size configurable up to 64K
- tcp: optimize TCP zero copy receive in presence of partial or
unaligned reads making zero copy a performance win for much smaller
messages
- XDP: add bulk APIs for returning / freeing frames
- sched: support fragmenting IP packets as they come out of conntrack
- net: allow virtual netdevs to forward UDP L4 and fraglist GSO skbs
BPF:
- BPF switch from crude rlimit-based to memcg-based memory accounting
- BPF type format information for kernel modules and related tracing
enhancements
- BPF implement task local storage for BPF LSM
- allow the FENTRY/FEXIT/RAW_TP tracing programs to use
bpf_sk_storage
Protocols:
- mptcp: improve multiple xmit streams support, memory accounting and
many smaller improvements
- TLS: support CHACHA20-POLY1305 cipher
- seg6: add support for SRv6 End.DT4/DT6 behavior
- sctp: Implement RFC 6951: UDP Encapsulation of SCTP
- ppp_generic: add ability to bridge channels directly
- bridge: Connectivity Fault Management (CFM) support as is defined
in IEEE 802.1Q section 12.14.
Drivers:
- mlx5: make use of the new auxiliary bus to organize the driver
internals
- mlx5: more accurate port TX timestamping support
- mlxsw:
- improve the efficiency of offloaded next hop updates by using
the new nexthop object API
- support blackhole nexthops
- support IEEE 802.1ad (Q-in-Q) bridging
- rtw88: major bluetooth co-existance improvements
- iwlwifi: support new 6 GHz frequency band
- ath11k: Fast Initial Link Setup (FILS)
- mt7915: dual band concurrent (DBDC) support
- net: ipa: add basic support for IPA v4.5
Refactor:
- a few pieces of in_interrupt() cleanup work from Sebastian Andrzej
Siewior
- phy: add support for shared interrupts; get rid of multiple driver
APIs and have the drivers write a full IRQ handler, slight growth
of driver code should be compensated by the simpler API which also
allows shared IRQs
- add common code for handling netdev per-cpu counters
- move TX packet re-allocation from Ethernet switch tag drivers to a
central place
- improve efficiency and rename nla_strlcpy
- number of W=1 warning cleanups as we now catch those in a patchwork
build bot
Old code removal:
- wan: delete the DLCI / SDLA drivers
- wimax: move to staging
- wifi: remove old WDS wifi bridging support"
* tag 'net-next-5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1922 commits)
net: hns3: fix expression that is currently always true
net: fix proc_fs init handling in af_packet and tls
nfc: pn533: convert comma to semicolon
af_vsock: Assign the vsock transport considering the vsock address flags
af_vsock: Set VMADDR_FLAG_TO_HOST flag on the receive path
vsock_addr: Check for supported flag values
vm_sockets: Add VMADDR_FLAG_TO_HOST vsock flag
vm_sockets: Add flags field in the vsock address data structure
net: Disable NETIF_F_HW_TLS_TX when HW_CSUM is disabled
tcp: Add logic to check for SYN w/ data in tcp_simple_retransmit
net: mscc: ocelot: install MAC addresses in .ndo_set_rx_mode from process context
nfc: s3fwrn5: Release the nfc firmware
net: vxget: clean up sparse warnings
mlxsw: spectrum_router: Use eXtended mezzanine to offload IPv4 router
mlxsw: spectrum: Set KVH XLT cache mode for Spectrum2/3
mlxsw: spectrum_router_xm: Introduce basic XM cache flushing
mlxsw: reg: Add Router LPM Cache Enable Register
mlxsw: reg: Add Router LPM Cache ML Delete Register
mlxsw: spectrum_router_xm: Implement L-value tracking for M-index
mlxsw: reg: Add XM Router M Table Register
...
proc_fs was used, in af_packet, without a surrounding #ifdef,
although there is no hard dependency on proc_fs.
That caused the initialization of the af_packet module to fail
when CONFIG_PROC_FS=n.
Specifically, proc_create_net() was used in af_packet.c,
and when it fails, packet_net_init() returns -ENOMEM.
It will always fail when the kernel is compiled without proc_fs,
because, proc_create_net() for example always returns NULL.
The calling order that starts in af_packet.c is as follows:
packet_init()
register_pernet_subsys()
register_pernet_operations()
__register_pernet_operations()
ops_init()
ops->init() (packet_net_ops.init=packet_net_init())
proc_create_net()
It worked in the past because register_pernet_subsys()'s return value
wasn't checked before this Commit 36096f2f4f ("packet: Fix error path in
packet_init.").
It always returned an error, but was not checked before, so everything
was working even when CONFIG_PROC_FS=n.
The fix here is simply to add the necessary #ifdef.
This also fixes a similar error in tls_proc.c, that was found by Jakub
Kicinski.
Fixes: d26b698dd3 ("net/tls: add skeleton of MIB statistics")
Fixes: 36096f2f4f ("packet: Fix error path in packet_init")
Signed-off-by: Yonatan Linik <yonatanlinik@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The vsock flags field can be set in the connect path (user space app)
and the (listen) receive path (kernel space logic).
When the vsock transport is assigned, the remote CID is used to
distinguish between types of connection.
Use the vsock flags value (in addition to the CID) from the remote
address to decide which vsock transport to assign. For the sibling VMs
use case, all the vsock packets need to be forwarded to the host, so
always assign the guest->host transport if the VMADDR_FLAG_TO_HOST flag
is set. For the other use cases, the vsock transport assignment logic is
not changed.
Changelog
v3 -> v4
* Update the "remote_flags" local variable type to reflect the change of
the "svm_flags" field to be 1 byte in size.
v2 -> v3
* Update bitwise check logic to not compare result to the flag value.
v1 -> v2
* Use bitwise operator to check the vsock flag.
* Use the updated "VMADDR_FLAG_TO_HOST" flag naming.
* Merge the checks for the g2h transport assignment in one "if" block.
Signed-off-by: Andra Paraschiv <andraprs@amazon.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The vsock flags can be set during the connect() setup logic, when
initializing the vsock address data structure variable. Then the vsock
transport is assigned, also considering this flags field.
The vsock transport is also assigned on the (listen) receive path. The
flags field needs to be set considering the use case.
Set the value of the vsock flags of the remote address to the one
targeted for packets forwarding to the host, if the following conditions
are met:
* The source CID of the packet is higher than VMADDR_CID_HOST.
* The destination CID of the packet is higher than VMADDR_CID_HOST.
Changelog
v3 -> v4
* No changes.
v2 -> v3
* No changes.
v1 -> v2
* Set the vsock flag on the receive path in the vsock transport
assignment logic.
* Use bitwise operator for the vsock flag setup.
* Use the updated "VMADDR_FLAG_TO_HOST" flag naming.
Signed-off-by: Andra Paraschiv <andraprs@amazon.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Check if the provided flags value from the vsock address data structure
includes the supported flags in the corresponding kernel version.
The first byte of the "svm_zero" field is used as "svm_flags", so add
the flags check instead.
Changelog
v3 -> v4
* New patch in v4.
Signed-off-by: Andra Paraschiv <andraprs@amazon.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
With NETIF_F_HW_TLS_TX packets are encrypted in HW. This cannot be
logically done when HW_CSUM offload is off.
Fixes: 2342a8512a ("net: Add TLS TX offload features")
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Boris Pismenny <borisp@nvidia.com>
Link: https://lore.kernel.org/r/20201213143929.26253-1-tariqt@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
There are cases where a fastopen SYN may trigger either a ICMP_TOOBIG
message in the case of IPv6 or a fragmentation request in the case of
IPv4. This results in the socket stalling for a second or more as it does
not respond to the message by retransmitting the SYN frame.
Normally a SYN frame should not be able to trigger a ICMP_TOOBIG or
ICMP_FRAG_NEEDED however in the case of fastopen we can have a frame that
makes use of the entire MSS. In the case of fastopen it does, and an
additional complication is that the retransmit queue doesn't contain the
original frames. As a result when tcp_simple_retransmit is called and
walks the list of frames in the queue it may not mark the frames as lost
because both the SYN and the data packet each individually are smaller than
the MSS size after the adjustment. This results in the socket being stalled
until the retransmit timer kicks in and forces the SYN frame out again
without the data attached.
In order to resolve this we can reduce the MSS the packets are compared
to in tcp_simple_retransmit to -1 for cases where we are still in the
TCP_SYN_SENT state for a fastopen socket. Doing this we will mark all of
the packets related to the fastopen SYN as lost.
Signed-off-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Link: https://lore.kernel.org/r/160780498125.3272.15437756269539236825.stgit@localhost.localdomain
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
syzbot reproduces BUG_ON in skb_checksum_help():
tun creates (bogus) skb with huge partial-checksummed area and
small ip packet inside. Then ip_rcv trims the skb based on size
of internal ip packet, after that csum offset points beyond of
trimmed skb. Then checksum_tg() called via netfilter hook
triggers BUG_ON:
offset = skb_checksum_start_offset(skb);
BUG_ON(offset >= skb_headlen(skb));
To work around the problem this patch forces pskb_trim_rcsum_slow()
to return -EINVAL in described scenario. It allows its callers to
drop such kind of packets.
Link: https://syzkaller.appspot.com/bug?id=b419a5ca95062664fe1a60b764621eb4526e2cd0
Reported-by: syzbot+7010af67ced6105e5ab6@syzkaller.appspotmail.com
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/1b2494af-2c56-8ee2-7bc0-923fcad1cdf8@virtuozzo.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
- migrate_disable/enable() support which originates from the RT tree and
is now a prerequisite for the new preemptible kmap_local() API which aims
to replace kmap_atomic().
- A fair amount of topology and NUMA related improvements
- Improvements for the frequency invariant calculations
- Enhanced robustness for the global CPU priority tracking and decision
making
- The usual small fixes and enhancements all over the place
-----BEGIN PGP SIGNATURE-----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=Oz1V
-----END PGP SIGNATURE-----
Merge tag 'sched-core-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Thomas Gleixner:
- migrate_disable/enable() support which originates from the RT tree
and is now a prerequisite for the new preemptible kmap_local() API
which aims to replace kmap_atomic().
- A fair amount of topology and NUMA related improvements
- Improvements for the frequency invariant calculations
- Enhanced robustness for the global CPU priority tracking and decision
making
- The usual small fixes and enhancements all over the place
* tag 'sched-core-2020-12-14' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (61 commits)
sched/fair: Trivial correction of the newidle_balance() comment
sched/fair: Clear SMT siblings after determining the core is not idle
sched: Fix kernel-doc markup
x86: Print ratio freq_max/freq_base used in frequency invariance calculations
x86, sched: Use midpoint of max_boost and max_P for frequency invariance on AMD EPYC
x86, sched: Calculate frequency invariance for AMD systems
irq_work: Optimize irq_work_single()
smp: Cleanup smp_call_function*()
irq_work: Cleanup
sched: Limit the amount of NUMA imbalance that can exist at fork time
sched/numa: Allow a floating imbalance between NUMA nodes
sched: Avoid unnecessary calculation of load imbalance at clone time
sched/numa: Rename nr_running and break out the magic number
sched: Make migrate_disable/enable() independent of RT
sched/topology: Condition EAS enablement on FIE support
arm64: Rebuild sched domains on invariance status changes
sched/topology,schedutil: Wrap sched domains rebuild
sched/uclamp: Allow to reset a task uclamp constraint value
sched/core: Fix typos in comments
Documentation: scheduler: fix information on arch SD flags, sched_domain and sched_debug
...
I got a warining report:
br_sysfs_addbr: can't create group bridge4/bridge
------------[ cut here ]------------
sysfs group 'bridge' not found for kobject 'bridge4'
WARNING: CPU: 2 PID: 9004 at fs/sysfs/group.c:279 sysfs_remove_group fs/sysfs/group.c:279 [inline]
WARNING: CPU: 2 PID: 9004 at fs/sysfs/group.c:279 sysfs_remove_group+0x153/0x1b0 fs/sysfs/group.c:270
Modules linked in: iptable_nat
...
Call Trace:
br_dev_delete+0x112/0x190 net/bridge/br_if.c:384
br_dev_newlink net/bridge/br_netlink.c:1381 [inline]
br_dev_newlink+0xdb/0x100 net/bridge/br_netlink.c:1362
__rtnl_newlink+0xe11/0x13f0 net/core/rtnetlink.c:3441
rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3500
rtnetlink_rcv_msg+0x385/0x980 net/core/rtnetlink.c:5562
netlink_rcv_skb+0x134/0x3d0 net/netlink/af_netlink.c:2494
netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
netlink_unicast+0x4a0/0x6a0 net/netlink/af_netlink.c:1330
netlink_sendmsg+0x793/0xc80 net/netlink/af_netlink.c:1919
sock_sendmsg_nosec net/socket.c:651 [inline]
sock_sendmsg+0x139/0x170 net/socket.c:671
____sys_sendmsg+0x658/0x7d0 net/socket.c:2353
___sys_sendmsg+0xf8/0x170 net/socket.c:2407
__sys_sendmsg+0xd3/0x190 net/socket.c:2440
do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
In br_device_event(), if the bridge sysfs fails to be added,
br_device_event() should return error. This can prevent warining
when removing bridge sysfs that do not exist.
Fixes: bb900b27a2 ("bridge: allow creating bridge devices with netlink")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Tested-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Link: https://lore.kernel.org/r/20201211122921.40386-1-wanghai38@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Currently the xmit path of the MPTCP protocol creates smaller-
than-max-size skbs, which is suboptimal for the performances.
There are a few things to improve:
- when coalescing to an existing skb, must clear the PUSH flag
- tcp_build_frag() expect the available space as an argument.
When coalescing is enable MPTCP already subtracted the
to-be-coalesced skb len. We must increment said argument
accordingly.
Before:
./use_mptcp.sh netperf -H 127.0.0.1 -t TCP_STREAM
[...]
131072 16384 16384 30.00 24414.86
After:
./use_mptcp.sh netperf -H 127.0.0.1 -t TCP_STREAM
[...]
131072 16384 16384 30.05 28357.69
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
There is no need to unconditionally acquire the join list
lock, we can simply splice the join list into the subflow
list and traverse only the latter.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
parse the MPTCP FASTCLOSE subtype.
If provided key matches the local one, schedule the work queue to close
(with tcp reset) all subflows.
The MPTCP socket moves to closed state immediately.
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Because TCP-level resets only affect the subflow, there is a MPTCP
option to indicate that the MPTCP-level connection should be closed
immediately without a mptcp-level fin exchange.
This is the 'MPTCP fast close option'. It can be carried on ack
segments or TCP resets. In the latter case, its needed to parse mptcp
options also for reset packets so that MPTCP can act accordingly.
Next patch will add receive side fastclose support in MPTCP.
Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When processing options from tcp reset path its possible that
tcp_done(ssk) drops the last reference on the mptcp socket which
results in use-after-free.
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Use the macro MPTCPOPT_HMAC_LEN instead of a constant in struct
mptcp_options_received.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When the PM netlink flushes the addresses, invoke the remove address
function mptcp_nl_remove_subflow_and_signal_addr to remove the addresses
and the subflows. Since this function should not be invoked under lock,
move __flush_addrs out of the pernet->lock.
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
It has been observed that the kernel sockets created for the subflows
(except the first one) are not in the same cgroup as their parents.
That's because the additional subflows are created by kernel workers.
This is a problem with eBPF programs attached to the parent's
cgroup won't be executed for the children. But also with any other features
of CGroup linked to a sk.
This patch fixes this behaviour.
As the subflow sockets are created by the kernel, we can't use
'mem_cgroup_sk_alloc' because of the current context being the one of the
kworker. This is why we have to do low level memcg manipulation, if
required.
Suggested-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Suggested-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Nicolas Rybowski <nicolas.rybowski@tessares.net>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Currently, the exception actions are not processed correctly as the wrong
dataset is passed. This change fixes this, including the misleading
comment.
In addition, a check was added to make sure we work on an IPv4 packet,
and not just assume if it's not IPv6 it's IPv4.
This was all tested using OVS with patch,
https://patchwork.ozlabs.org/project/openvswitch/list/?series=21639,
applied and sending packets with a TTL of 1 (and 0), both with IPv4
and IPv6.
Fixes: 69929d4c49 ("net: openvswitch: fix TTL decrement action netlink message format")
Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Link: https://lore.kernel.org/r/160733569860.3007.12938188180387116741.stgit@wsfd-netdev64.ntdv.lab.eng.bos.redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----
iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCX9daOgAKCRCRxhvAZXjc
ohPkAQChXUB2BAjtIzXlCkZoDBbzHHblm5DZ37oy/4xYFmAcEwEA5sw6dQqyGHnF
GEP9def51HvXLpBV2BzNUGggo1SoGgQ=
=w/cO
-----END PGP SIGNATURE-----
Merge tag 'fixes-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull misc fixes from Christian Brauner:
"This contains several fixes which felt worth being combined into a
single branch:
- Use put_nsproxy() instead of open-coding it switch_task_namespaces()
- Kirill's work to unify lifecycle management for all namespaces. The
lifetime counters are used identically for all namespaces types.
Namespaces may of course have additional unrelated counters and
these are not altered. This work allows us to unify the type of the
counters and reduces maintenance cost by moving the counter in one
place and indicating that basic lifetime management is identical
for all namespaces.
- Peilin's fix adding three byte padding to Dmitry's
PTRACE_GET_SYSCALL_INFO uapi struct to prevent an info leak.
- Two smal patches to convert from the /* fall through */ comment
annotation to the fallthrough keyword annotation which I had taken
into my branch and into -next before df561f6688 ("treewide: Use
fallthrough pseudo-keyword") made it upstream which fixed this
tree-wide.
Since I didn't want to invalidate all testing for other commits I
didn't rebase and kept them"
* tag 'fixes-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
nsproxy: use put_nsproxy() in switch_task_namespaces()
sys: Convert to the new fallthrough notation
signal: Convert to the new fallthrough notation
time: Use generic ns_common::count
cgroup: Use generic ns_common::count
mnt: Use generic ns_common::count
user: Use generic ns_common::count
pid: Use generic ns_common::count
ipc: Use generic ns_common::count
uts: Use generic ns_common::count
net: Use generic ns_common::count
ns: Add a common refcount into ns_common
ptrace: Prevent kernel-infoleak in ptrace_get_syscall_info()
Pablo Neira Ayuso says:
====================
Netfilter/IPVS updates for net-next
1) Missing dependencies in NFT_BRIDGE_REJECT, from Randy Dunlap.
2) Use atomic_inc_return() instead of atomic_add_return() in IPVS,
from Yejune Deng.
3) Simplify check for overquota in xt_nfacct, from Kaixu Xia.
4) Move nfnl_acct_list away from struct net, from Miao Wang.
5) Pass actual sk in reject actions, from Jan Engelhardt.
6) Add timeout and protoinfo to ctnetlink destroy events,
from Florian Westphal.
7) Four patches to generalize set infrastructure to support
for multiple expressions per set element.
* git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next:
netfilter: nftables: netlink support for several set element expressions
netfilter: nftables: generalize set extension to support for several expressions
netfilter: nftables: move nft_expr before nft_set
netfilter: nftables: generalize set expressions support
netfilter: ctnetlink: add timeout and protoinfo to destroy events
netfilter: use actual socket sk for REJECT action
netfilter: nfnl_acct: remove data from struct net
netfilter: Remove unnecessary conversion to bool
ipvs: replace atomic_add_return()
netfilter: nft_reject_bridge: fix build errors due to code movement
====================
Link: https://lore.kernel.org/r/20201212230513.3465-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Daniel Borkmann says:
====================
pull-request: bpf-next 2020-12-14
1) Expose bpf_sk_storage_*() helpers to iterator programs, from Florent Revest.
2) Add AF_XDP selftests based on veth devs to BPF selftests, from Weqaar Janjua.
3) Support for finding BTF based kernel attach targets through libbpf's
bpf_program__set_attach_target() API, from Andrii Nakryiko.
4) Permit pointers on stack for helper calls in the verifier, from Yonghong Song.
5) Fix overflows in hash map elem size after rlimit removal, from Eric Dumazet.
6) Get rid of direct invocation of llc in BPF selftests, from Andrew Delgadillo.
7) Fix xsk_recvmsg() to reorder socket state check before access, from Björn Töpel.
8) Add new libbpf API helper to retrieve ring buffer epoll fd, from Brendan Jackman.
9) Batch of minor BPF selftest improvements all over the place, from Florian Lehner,
KP Singh, Jiri Olsa and various others.
* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (31 commits)
selftests/bpf: Add a test for ptr_to_map_value on stack for helper access
bpf: Permits pointers on stack for helper calls
libbpf: Expose libbpf ring_buffer epoll_fd
selftests/bpf: Add set_attach_target() API selftest for module target
libbpf: Support modules in bpf_program__set_attach_target() API
selftests/bpf: Silence ima_setup.sh when not running in verbose mode.
selftests/bpf: Drop the need for LLVM's llc
selftests/bpf: fix bpf_testmod.ko recompilation logic
samples/bpf: Fix possible hang in xdpsock with multiple threads
selftests/bpf: Make selftest compilation work on clang 11
selftests/bpf: Xsk selftests - adding xdpxceiver to .gitignore
selftests/bpf: Drop tcp-{client,server}.py from Makefile
selftests/bpf: Xsk selftests - Bi-directional Sockets - SKB, DRV
selftests/bpf: Xsk selftests - Socket Teardown - SKB, DRV
selftests/bpf: Xsk selftests - DRV POLL, NOPOLL
selftests/bpf: Xsk selftests - SKB POLL, NOPOLL
selftests/bpf: Xsk selftests framework
bpf: Only provide bpf_sock_from_file with CONFIG_NET
bpf: Return -ENOTSUPP when attaching to non-kernel BTF
xsk: Validate socket state in xsk_recvmsg, prior touching socket members
...
====================
Link: https://lore.kernel.org/r/20201214214316.20642-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Implement msgr2.1 wire protocol, available since nautilus 14.2.11
and octopus 15.2.5. msgr2.0 wire protocol is not implemented -- it
has several security, integrity and robustness issues and therefore
considered deprecated.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
msgr2 supports two connection modes: crc (plain) and secure (on-wire
encryption). Connection mode is picked by server based on input from
client.
Introduce ms_mode option:
ms_mode=legacy - msgr1 (default)
ms_mode=crc - crc mode, if denied fail
ms_mode=secure - secure mode, if denied fail
ms_mode=prefer-crc - crc mode, if denied agree to secure mode
ms_mode=prefer-secure - secure mode, if denied agree to crc mode
ms_mode affects all connections, we don't separate connections to mons
like it's done in userspace with ms_client_mode vs ms_mon_client_mode.
For now the default is legacy, to be flipped to prefer-crc after some
time.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
For libceph, this ensures that libceph instance sharing (share option)
continues to work. For rbd, this avoids blocklisting alive lock owners
(locker addr is always LEGACY, while watcher addr is ANY in nautilus).
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
In preparation for msgr2, make the cluster send us maps with addrvecs
including both LEGACY and MSGR2 addrs instead of a single LEGACY addr.
This means advertising support for SERVER_NAUTILUS and also some older
features: SERVER_MIMIC, MONENC and MONNAMES.
MONNAMES and MONENC are actually pre-argonaut, we just never updated
ceph_monmap_decode() for them. Decoding is unconditional, see commit
23c625ce30 ("libceph: assume argonaut on the server side").
SERVER_MIMIC doesn't bear any meaning for the kernel client.
Since ceph_decode_entity_addrvec() is guarded by encoding version
checks (and in msgr2 case it is guarded implicitly by the fact that
server is speaking msgr2), we assume MSG_ADDR2 for it.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
In preparation for msgr2, factor out finish_auth() so it is suitable
for both existing MAuth message based authentication and upcoming msgr2
authentication exchange.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
In msgr2, initial authentication happens with an exchange of msgr2
control frames -- MAuth message and struct ceph_mon_request_header
aren't used. Make that optional.
Stop reporting cephx protocol as "x". Use "cephx" instead.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
- request service tickets together with auth ticket. Currently we get
auth ticket via CEPHX_GET_AUTH_SESSION_KEY op and then request service
tickets via CEPHX_GET_PRINCIPAL_SESSION_KEY op in a separate message.
Since nautilus, desired service tickets are shared togther with auth
ticket in CEPHX_GET_AUTH_SESSION_KEY reply.
- propagate session key and connection secret, if any. In preparation
for msgr2, update handle_reply() and verify_authorizer_reply() auth
ops to propagate session key and connection secret. Since nautilus,
if secure mode is negotiated, connection secret is shared either in
CEPHX_GET_AUTH_SESSION_KEY reply (for mons) or in a final authorizer
reply (for osds and mdses).
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Make it clear that "need" is a union of "missing" and "have, but up
for renewal" and dout when the ticket goes missing due to expiry or
invalidation by client.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
A pure move, no other changes.
Note that ceph_tcp_recv{msg,page}() and ceph_tcp_send{msg,page}()
helpers are also moved. msgr2 will bring its own, more efficient,
variants based on iov_iter. Switching msgr1 to them was considered
but decided against to avoid subtle regressions.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
In preparation for msgr2, define internal messenger <-> protocol
interface (as opposed to external messenger <-> client interface, which
is struct ceph_connection_operations) consisting of try_read(),
try_write(), revoke(), revoke_incoming(), opened(), reset_session() and
reset_protocol() ops. The semantics are exactly the same as they are
now.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
In preparation for msgr2, rename msgr1 specific states and move the
defines to the header file.
Also drop state transition comments. They don't cover all possible
transitions (e.g. NEGOTIATING -> STANDBY, etc) and currently do more
harm than good.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
unsigned long is a leftover from when con->state used to be a set of
bits managed with set_bit(), clear_bit(), etc. Save a bit of memory.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Our messenger instance addr->port is normally zero -- anything else is
nonsensical because as a client we connect to multiple servers and don't
listen on any port. However, a user can supply an arbitrary addr:port
via ip option and the port is currently preserved. Zero it.
Conversely, make sure our addr->nonce is non-zero. A zero nonce is
special: in combination with a zero port, it is used to blocklist the
entire ip.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Move the logic of grabbing the next message from the queue into its own
function. Like ceph_con_in_msg_alloc(), this is protocol independent.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
ceph_con_in_msg_alloc() is protocol independent, but con->in_hdr (and
struct ceph_msg_header in general) is msgr1 specific. While the struct
is deeply ingrained inside and outside the messenger, con->in_hdr field
can be separated.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Stick with pr_info message because session reset isn't an error most of
the time. When it is (i.e. if the server denies the reconnect attempt),
we get a bunch of other pr_err messages.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
con->peer_global_seq is part of session state. Clear it when
the server tells us to reset, not just in ceph_con_close().
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Move protocol reset bits into ceph_con_reset_protocol(), leaving
just session reset bits.
Note that con->out_skip is now reset on faults. This fixes a crash
in the case of a stateful session getting a fault while in the middle
of revoking a message.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
A fault due to a version mismatch or a feature set mismatch used to be
treated differently from other faults: the connection would get closed
without trying to reconnect and there was a ->bad_proto() connection op
for notifying about that.
This changed a long time ago, see commits 6384bb8b8e ("libceph: kill
bad_proto ceph connection op") and 0fa6ebc600 ("libceph: fix protocol
feature mismatch failure path"). Nowadays these aren't any different
from other faults (i.e. we try to reconnect even though the mismatch
won't resolve until the server is replaced). reset_connection() calls
there are rather confusing because reset_connection() resets a session
together an individual instance of the protocol. This is cleaned up
in the next patch.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
The current setting allows the backoff to climb up to 5 minutes. This
is too high -- it becomes hard to tell whether the client is stuck on
something or just in backoff.
In userspace, ms_max_backoff is defaulted to 15 seconds. Let's do the
same.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Pull crypto updates from Herbert Xu:
"API:
- Add speed testing on 1420-byte blocks for networking
Algorithms:
- Improve performance of chacha on ARM for network packets
- Improve performance of aegis128 on ARM for network packets
Drivers:
- Add support for Keem Bay OCS AES/SM4
- Add support for QAT 4xxx devices
- Enable crypto-engine retry mechanism in caam
- Enable support for crypto engine on sdm845 in qce
- Add HiSilicon PRNG driver support"
* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (161 commits)
crypto: qat - add capability detection logic in qat_4xxx
crypto: qat - add AES-XTS support for QAT GEN4 devices
crypto: qat - add AES-CTR support for QAT GEN4 devices
crypto: atmel-i2c - select CONFIG_BITREVERSE
crypto: hisilicon/trng - replace atomic_add_return()
crypto: keembay - Add support for Keem Bay OCS AES/SM4
dt-bindings: Add Keem Bay OCS AES bindings
crypto: aegis128 - avoid spurious references crypto_aegis128_update_simd
crypto: seed - remove trailing semicolon in macro definition
crypto: x86/poly1305 - Use TEST %reg,%reg instead of CMP $0,%reg
crypto: x86/sha512 - Use TEST %reg,%reg instead of CMP $0,%reg
crypto: aesni - Use TEST %reg,%reg instead of CMP $0,%reg
crypto: cpt - Fix sparse warnings in cptpf
hwrng: ks-sa - Add dependency on IOMEM and OF
crypto: lib/blake2s - Move selftest prototype into header file
crypto: arm/aes-ce - work around Cortex-A57/A72 silion errata
crypto: ecdh - avoid unaligned accesses in ecdh_set_secret()
crypto: ccree - rework cache parameters handling
crypto: cavium - Use dma_set_mask_and_coherent to simplify code
crypto: marvell/octeontx - Use dma_set_mask_and_coherent to simplify code
...
If we're shifting the page data to the right, and this happens to be a
sparse page array, then we may need to allocate new pages in order to
receive the data.
Reported-by: "Mkrtchyan, Tigran" <tigran.mkrtchyan@desy.de>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
There are a number of xdr helpers for struct xdr_buf that do not change
the structure itself. Mark those as taking const pointers for
documentation purposes.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Move the setting of the xdr_stream 'nwords' field into the helpers that
reset the xdr_stream cursor.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
We do want to try to grow the buffer if possible, but if that attempt
fails, we still want to move the data and truncate the XDR message.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
The main use case right now for xdr_align_data() is to shift the page
data to the left, and in practice shrink the total XDR data buffer.
This patch ensures that we fix up the accounting for the buffer length
as we shift that data around.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Olga K. observed that rpcrdma_marsh_req() allocates sparse pages
only when it has determined that a Reply chunk is necessary. There
are plenty of cases where no Reply chunk is needed, but the
XDRBUF_SPARSE_PAGES flag is set. The result would be a crash in
rpcrdma_inline_fixup() when it tries to copy parts of the received
Reply into a missing page.
To avoid crashing, handle sparse page allocation up front.
Until XATTR support was added, this issue did not appear often
because the only SPARSE_PAGES consumer always expected a reply large
enough to always require a Reply chunk.
Reported-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
When receiving pages data, return value 'ret' when positive includes
`buf->page_base`, so we should subtract that before it is used for
changing `offset` and comparing against `want`.
This was discovered on the very rare cases where the server returned a
chunk of bytes that when added to the already received amount of bytes
for the pages happened to match the current `recv.len`, for example
on this case:
buf->page_base : 258356
actually received from socket: 1740
ret : 260096
want : 260096
In this case neither of the two 'if ... goto out' trigger, and we
continue to tail parsing.
Worth to mention that the ensuing EMSGSIZE from the continued execution of
`xs_read_xdr_buf` may be observed by an application due to 4 superfluous
bytes being added to the pages data.
Fixes: 277e4ab7d5 ("SUNRPC: Simplify TCP receive code by switching to using iterators")
Signed-off-by: Dan Aloni <dan@kernelim.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
According to the X.25 documentation, there was a plan to implement
X.25-over-802.2-LLC. It never finished but left various code stubs in the
X.25 code. At this time it is unlikely that it would ever finish so it
may be better to remove those code stubs.
Also change the documentation to make it clear that this is not a ongoing
plan anymore. Change words like "will" to "could", "would", etc.
Cc: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Link: https://lore.kernel.org/r/20201209033346.83742-1-xie.he.0141@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
On a few of our systems, I found frequent 'unshare(CLONE_NEWNET)' calls
make the number of active slab objects including 'sock_inode_cache' type
rapidly and continuously increase. As a result, memory pressure occurs.
In more detail, I made an artificial reproducer that resembles the
workload that we found the problem and reproduce the problem faster. It
merely repeats 'unshare(CLONE_NEWNET)' 50,000 times in a loop. It takes
about 2 minutes. On 40 CPU cores / 70GB DRAM machine, the available
memory continuously reduced in a fast speed (about 120MB per second,
15GB in total within the 2 minutes). Note that the issue don't
reproduce on every machine. On my 6 CPU cores machine, the problem
didn't reproduce.
'cleanup_net()' and 'fqdir_work_fn()' are functions that deallocate the
relevant memory objects. They are asynchronously invoked by the work
queues and internally use 'rcu_barrier()' to ensure safe destructions.
'cleanup_net()' works in a batched maneer in a single thread worker,
while 'fqdir_work_fn()' works for each 'fqdir_exit()' call in the
'system_wq'. Therefore, 'fqdir_work_fn()' called frequently under the
workload and made the contention for 'rcu_barrier()' high. In more
detail, the global mutex, 'rcu_state.barrier_mutex' became the
bottleneck.
This commit avoids such contention by doing the 'rcu_barrier()' and
subsequent lightweight works in a batched manner, as similar to that of
'cleanup_net()'. The fqdir hashtable destruction, which is done before
the 'rcu_barrier()', is still allowed to run in parallel for fast
processing, but this commit makes it to use a dedicated work queue
instead of the 'system_wq', to make sure that the number of threads is
bounded.
Signed-off-by: SeongJae Park <sjpark@amazon.de>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20201211112405.31158-1-sjpark@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Steffen Klassert says:
====================
pull request (net-next): ipsec-next 2020-12-12
Just one patch this time:
1) Redact the SA keys with kernel lockdown confidentiality.
If enabled, no secret keys are sent to uuserspace.
From Antony Antony.
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next:
xfrm: redact SA secret with lockdown confidentiality
====================
Link: https://lore.kernel.org/r/20201212085737.2101294-1-steffen.klassert@secunet.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This patch adds three new netlink attributes to encapsulate a list of
expressions per set elements:
- NFTA_SET_EXPRESSIONS: this attribute provides the set definition in
terms of expressions. New set elements get attached the list of
expressions that is specified by this new netlink attribute.
- NFTA_SET_ELEM_EXPRESSIONS: this attribute allows users to restore (or
initialize) the stateful information of set elements when adding an
element to the set.
- NFTA_DYNSET_EXPRESSIONS: this attribute specifies the list of
expressions that the set element gets when it is inserted from the
packet path.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This patch replaces NFT_SET_EXPR by NFT_SET_EXT_EXPRESSIONS. This new
extension allows to attach several expressions to one set element (not
only one single expression as NFT_SET_EXPR provides). This patch
prepares for support for several expressions per set element in the
netlink userspace API.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* validate key indices for key deletion
* more preamble support in mac80211
* various 6 GHz scan fixes/improvements
* a common SAR power limitations API
* various small fixes & code improvements
-----BEGIN PGP SIGNATURE-----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=+qd6
-----END PGP SIGNATURE-----
Merge tag 'mac80211-next-for-net-next-2020-12-11' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Johannes Berg says:
====================
A new set of wireless changes:
* validate key indices for key deletion
* more preamble support in mac80211
* various 6 GHz scan fixes/improvements
* a common SAR power limitations API
* various small fixes & code improvements
* tag 'mac80211-next-for-net-next-2020-12-11' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next: (35 commits)
mac80211: add ieee80211_set_sar_specs
nl80211: add common API to configure SAR power limitations
mac80211: fix a mistake check for rx_stats update
mac80211: mlme: save ssid info to ieee80211_bss_conf while assoc
mac80211: Update rate control on channel change
mac80211: don't filter out beacons once we start CSA
mac80211: Fix calculation of minimal channel width
mac80211: ignore country element TX power on 6 GHz
mac80211: use bitfield helpers for BA session action frames
mac80211: support Rx timestamp calculation for all preamble types
mac80211: don't set set TDLS STA bandwidth wider than possible
mac80211: support driver-based disconnect with reconnect hint
cfg80211: support immediate reconnect request hint
mac80211: use struct assignment for he_obss_pd
cfg80211: remove struct ieee80211_he_bss_color
nl80211: validate key indexes for cfg80211_registered_device
cfg80211: include block-tx flag in channel switch started event
mac80211: disallow band-switch during CSA
ieee80211: update reduced neighbor report TBTT info length
cfg80211: Save the regulatory domain when setting custom regulatory
...
====================
Link: https://lore.kernel.org/r/20201211142552.209018-1-johannes@sipsolutions.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Currently, the set infrastucture allows for one single expressions per
element. This patch extends the existing infrastructure to allow for up
to two expressions. This is not updating the netlink API yet, this is
coming as an initial preparation patch.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
DESTROY events do not include the remaining timeout.
Add the timeout if the entry was removed explicitly. This can happen
when a conntrack gets deleted prematurely, e.g. due to a tcp reset,
module removal, netdev notifier (nat/masquerade device went down),
ctnetlink and so on.
Add the protocol state too for the destroy message to check for abnormal
state on connection termination.
Joint work with Pablo.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
xdp_return_frame_bulk() needs to pass a xdp_buff
to __xdp_return().
strlcpy got converted to strscpy but here it makes no
functional difference, so just keep the right code.
Conflicts:
net/netfilter/nf_tables_api.c
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This change registers ieee80211_set_sar_specs to
mac80211_config_ops, so cfg80211 can call it.
Signed-off-by: Carl Huang <cjhuang@codeaurora.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Abhishek Kumar <kuabhs@chromium.org>
Link: https://lore.kernel.org/r/20201203103728.3034-3-cjhuang@codeaurora.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
NL80211_CMD_SET_SAR_SPECS is added to configure SAR from
user space. NL80211_ATTR_SAR_SPEC is used to pass the SAR
power specification when used with NL80211_CMD_SET_SAR_SPECS.
Wireless driver needs to register SAR type, supported frequency
ranges to wiphy, so user space can query it. The index in
frequency range is used to specify which sub band the power
limitation applies to. The SAR type is for compatibility, so later
other SAR mechanism can be implemented without breaking the user
space SAR applications.
Normal process is user space queries the SAR capability, and
gets the index of supported frequency ranges and associates the
power limitation with this index and sends to kernel.
Here is an example of message send to kernel:
8c 00 00 00 08 00 01 00 00 00 00 00 38 00 2b 81
08 00 01 00 00 00 00 00 2c 00 02 80 14 00 00 80
08 00 02 00 00 00 00 00 08 00 01 00 38 00 00 00
14 00 01 80 08 00 02 00 01 00 00 00 08 00 01 00
48 00 00 00
NL80211_CMD_SET_SAR_SPECS: 0x8c
NL80211_ATTR_WIPHY: 0x01(phy idx is 0)
NL80211_ATTR_SAR_SPEC: 0x812b (NLA_NESTED)
NL80211_SAR_ATTR_TYPE: 0x00 (NL80211_SAR_TYPE_POWER)
NL80211_SAR_ATTR_SPECS: 0x8002 (NLA_NESTED)
freq range 0 power: 0x38 in 0.25dbm unit (14dbm)
freq range 1 power: 0x48 in 0.25dbm unit (18dbm)
Signed-off-by: Carl Huang <cjhuang@codeaurora.org>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Abhishek Kumar <kuabhs@chromium.org>
Link: https://lore.kernel.org/r/20201203103728.3034-2-cjhuang@codeaurora.org
[minor edits, NLA parse cleanups]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
It should be !is_multicast_ether_addr() in ieee80211_rx_h_sta_process()
for the rx_stats update, below commit remove the !, this patch is to
change it back.
It lead the rx rate "iw wlan0 station dump" become invalid for some
scenario when IEEE80211_HW_USES_RSS is set.
Fixes: 09a740ce35 ("mac80211: receive and process S1G beacons")
Signed-off-by: Wen Gong <wgong@codeaurora.org>
Link: https://lore.kernel.org/r/1607483189-3891-1-git-send-email-wgong@codeaurora.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The ssid info of ieee80211_bss_conf is filled in ieee80211_start_ap()
for AP mode. For STATION mode, it is empty, save the info from struct
ieee80211_mgd_assoc_data, the struct ieee80211_mgd_assoc_data will be
freed after assoc, so the ssid info of ieee80211_mgd_assoc_data can not
access after assoc, save ssid info to ieee80211_bss_conf, then ssid info
can be still access after assoc.
Signed-off-by: Wen Gong <wgong@codeaurora.org>
Link: https://lore.kernel.org/r/1607312195-3583-2-git-send-email-wgong@codeaurora.org
[reset on disassoc]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
A channel change or a channel bandwidth change can impact the
rate control logic. However, the rate control logic was not updated
before/after such a change, which might result in unexpected
behavior.
Fix this by updating the stations rate control logic when the
corresponding channel context changes.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201206145305.600d967fe3c9.I48305f25cfcc9c032c77c51396e9e9b882748a86@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
I hit a bug in which we started a CSA with an action frame,
but the AP changed its mind and didn't change the beacon.
The CSA wasn't cancelled and we lost the connection.
The beacons were ignored because they never changed: they
never contained any CSA IE. Because they never changed, the
CRC of the beacon didn't change either which made us ignore
the beacons instead of processing them.
Now what happens is:
1) beacon has CRC X and it is valid. No CSA IE in the beacon
2) as long as beacon's CRC X, don't process their IEs
3) rx action frame with CSA
4) invalidate the beacon's CRC
5) rx beacon, CRC is still X, but now it is invalid
6) process the beacon, detect there is no CSA IE
7) abort CSA
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201206145305.83470b8407e6.I739b907598001362744692744be15335436b8351@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When calculating the minimal channel width for channel context,
the current operation Rx channel width of a station was used and not
the overall channel width capability of the station, i.e., both for
Tx and Rx.
Fix ieee80211_get_sta_bw() to use the maximal channel width the
station is capable. While at it make the function static.
Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201206145305.4387040b99a0.I74bcf19238f75a5960c4098b10e355123d933281@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Updates to the 802.11ax draft are coming that deprecate the
country element in favour of the transmit power envelope
element, and make the maximum transmit power level field in
the triplets reserved, so if we parse them we'd use 0 dBm
transmit power.
Follow suit and completely ignore the element on 6 GHz for
purposes of determining TX power.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201206145305.9abf9f6b4f88.Icb6e52af586edcc74f1f0360e8f6fc9ef2bfe8f5@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
When we set up a TDLS station, we set sta->sta.bandwidth solely based
on the capabilities, because the "what's the current bandwidth" check
is bypassed and only applied for other types of stations.
This leads to the unfortunate scenario that the sta->sta.bandwidth is
160 MHz if both stations support it, but we never actually configure
this bandwidth unless the AP is already using 160 MHz; even for wider
bandwidth support we only go up to 80 MHz (at least right now.)
For iwlwifi, this can also lead to firmware asserts, telling us that
we've configured the TX rates for a higher bandwidth than is actually
available due to the PHY configuration.
For non-TDLS, we check against the interface's requested bandwidth,
but we explicitly skip this check for TDLS to cope with the wider BW
case. Change this to
(a) still limit to the TDLS peer's own chandef, which gets factored
into the overall PHY configuration we request from the driver,
and
(b) limit it to when the TDLS peer is authorized, because it's only
factored into the channel context in this case.
Fixes: 504871e602 ("mac80211: fix bandwidth computation for TDLS peers")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201206145305.fcc7d29c4590.I11f77e9e25ddf871a3c8d5604650c763e2c5887a@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
We don't really use this struct, we're now using
struct cfg80211_he_bss_color instead.
Change the one place in mac80211 that's using the old
name to use struct assignment instead of memcpy() and
thus remove the wrong sizeof while at it.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201206145305.f6698d97ae4e.Iba2dffcb79c4ab80bde7407609806010b55edfdf@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
syzbot discovered a bug in which an OOB access was being made because
an unsuitable key_idx value was wrongly considered to be acceptable
while deleting a key in nl80211_del_key().
Since we don't know the cipher at the time of deletion, if
cfg80211_validate_key_settings() were to be called directly in
nl80211_del_key(), even valid keys would be wrongly determined invalid,
and deletion wouldn't occur correctly.
For this reason, a new function - cfg80211_valid_key_idx(), has been
created, to determine if the key_idx value provided is valid or not.
cfg80211_valid_key_idx() is directly called in 2 places -
nl80211_del_key(), and cfg80211_validate_key_settings().
Reported-by: syzbot+49d4cab497c2142ee170@syzkaller.appspotmail.com
Tested-by: syzbot+49d4cab497c2142ee170@syzkaller.appspotmail.com
Suggested-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com>
Link: https://lore.kernel.org/r/20201204215825.129879-1-anant.thazhemadam@gmail.com
Cc: stable@vger.kernel.org
[also disallow IGTK key IDs if no IGTK cipher is supported]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
If the AP advertises a band switch during CSA, we will not have
the right information to continue working with it, since it will
likely (have to) change its capabilities and we don't track any
capability changes at all. Additionally, we store e.g. supported
rates per band, and that information would become invalid.
Since this is a fringe scenario, just disconnect explicitly.
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201129172929.0e2327107c06.I461adb07704e056b054a4a7c29b80c95a9f56637@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Accept a scan request with the duration set even if the driver
does not support setting the scan dwell. The duration can be used
as a hint to the driver, but the driver may use its internal logic
for setting the scan dwell.
Signed-off-by: Avraham Stern <avraham.stern@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201129172929.9491a12f9226.Ia9c5b24fcefc5ce5592537507243391633a27e5f@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
In case of scan request with wildcard SSID, or in case of more
than one SSID in scan request, need to scan PSC channels even though
all the co-located APs found during the legacy bands scan indicated
that all the APs in their ESS are co-located, as we might find different
networks on the PSC channels.
Signed-off-by: Ayala Beker <ayala.beker@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201129172929.736415a9ca5d.If5b3578ae85e11a707a5da07e66ba85928ba702c@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Support the driver incrementing MIC error and replay detected
counters when having detected a bad frame, if it drops it directly
instead of relying on mac80211 to do the checks.
These are then exposed to userspace, though currently only in some
cases and in debugfs.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20201129172929.fb59be9c6de8.Ife2260887366f585afadd78c983ebea93d2bb54b@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Instead of casting callback functions to type iw_handler, which trips
indirect call checking with Clang's Control-Flow Integrity (CFI), add
stub functions with the correct function type for the callbacks.
Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20201117205902.405316-1-samitolvanen@google.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Don't populate the const array bws on the stack but instead it
static. Makes the object code smaller by 80 bytes:
Before:
text data bss dec hex filename
85694 16865 1216 103775 1955f ./net/wireless/reg.o
After:
text data bss dec hex filename
85518 16961 1216 103695 1950f ./net/wireless/reg.o
(gcc version 10.2.0)
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20201116181636.362729-1-colin.king@canonical.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Commits
d3fd65484c ("net: core: add dev_sw_netstats_tx_add")
451b05f413 ("net: netdevice.h: sw_netstats_rx_add helper)
have added API to update net device per-cpu TX/RX stats.
Use core API instead of ieee80211_tx/rx_stats().
Signed-off-by: Lev Stipakov <lev@openvpn.net>
Reviewed-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/20201113214623.144663-1-lev@openvpn.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
The WLAN device may exist yet not be usable. This can happen
when the WLAN device is controllable by both the host and
some platform internal component.
We need some arbritration that is vendor specific, but when
the device is not available for the host, we need to reflect
this state towards the user space.
Add a reason field to the rfkill object (and event) so that
userspace can know why the device is in rfkill: because some
other platform component currently owns the device, or
because the actual hw rfkill signal is asserted.
Capable userspace can now determine the reason for the rfkill
and possibly do some negotiation on a side band channel using
a proprietary protocol to gain ownership on the device in case
the device is owned by some other component. When the host
gains ownership on the device, the kernel can remove the
RFKILL_HARD_BLOCK_NOT_OWNER reason and the hw rfkill state
will be off. Then, the userspace can bring the device up and
start normal operation.
The rfkill_event structure is enlarged to include the additional
byte, it is now 9 bytes long. Old user space will ask to read
only 8 bytes so that the kernel can know not to feed them with
more data. When the user space writes 8 bytes, new kernels will
just read what is present in the file descriptor. This new byte
is read only from the userspace standpoint anyway.
If a new user space uses an old kernel, it'll ask to read 9 bytes
but will get only 8, and it'll know that it didn't get the new
state. When it'll write 9 bytes, the kernel will again ignore
this new byte which is read only from the userspace standpoint.
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Link: https://lore.kernel.org/r/20201104134641.28816-1-emmanuel.grumbach@intel.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Alexei Starovoitov says:
====================
pull-request: bpf 2020-12-10
The following pull-request contains BPF updates for your *net* tree.
We've added 21 non-merge commits during the last 12 day(s) which contain
a total of 21 files changed, 163 insertions(+), 88 deletions(-).
The main changes are:
1) Fix propagation of 32-bit signed bounds from 64-bit bounds, from Alexei.
2) Fix ring_buffer__poll() return value, from Andrii.
3) Fix race in lwt_bpf, from Cong.
4) Fix test_offload, from Toke.
5) Various xsk fixes.
Please consider pulling these changes from:
git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git
Thanks a lot!
Also thanks to reporters, reviewers and testers of commits in this pull-request:
Cong Wang, Hulk Robot, Jakub Kicinski, Jean-Philippe Brucker, John
Fastabend, Magnus Karlsson, Maxim Mikityanskiy, Yonghong Song
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
We use rcu_assign_pointer to assign both the table and the entries,
but the entries are not marked as __rcu. This generates sparse
warnings.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
A prior patch increased the size of struct tcp_zerocopy_receive
but did not update do_tcp_getsockopt() handling to properly account
for this.
This patch simply reintroduces content erroneously cut from the
referenced prior patch that handles the new struct size.
Fixes: 18fb76ed53 ("net-zerocopy: Copy straggler unaligned data for TCP Rx. zerocopy.")
Signed-off-by: Arjun Roy <arjunroy@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When CAN_ISOTP_SF_BROADCAST is set in the CAN_ISOTP_OPTS flags the CAN_ISOTP
socket is switched into functional addressing mode, where only single frame
(SF) protocol data units can be send on the specified CAN interface and the
given tp.tx_id after bind().
In opposite to normal and extended addressing this socket does not register a
CAN-ID for reception which would be needed for a 1-to-1 ISOTP connection with a
segmented bi-directional data transfer.
Sending SFs on this socket is therefore a TX-only 'broadcast' operation.
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Thomas Wagner <thwa1@web.de>
Link: https://lore.kernel.org/r/20201206144731.4609-1-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
1. When the x25 module gets loaded, layer 2 may already be running and
connected. In this case, although we are in X25_LINK_STATE_0, we still
need to handle the Restart Request received, rather than ignore it.
2. When we are in X25_LINK_STATE_2, we have already sent a Restart Request
and is waiting for the Restart Confirmation with t20timer. t20timer will
restart itself repeatedly forever so it will always be there, as long as we
are in State 2. So we don't need to check x25_t20timer_pending again.
Fixes: d023b2b9cc ("net/x25: fix restart request/confirm handling")
Cc: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Acked-by: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
When the workqueue disposes of the msk, the subflows can still
receive some data from the peer after __mptcp_close_ssk()
completes.
The above could trigger a race between the msk receive path and the
msk destruction. Acquiring the mptcp_data_lock() in __mptcp_destroy_sock()
will not save the day: the rx path could be reached even after msk
destruction completes.
Instead use the subflow 'disposable' flag to prevent entering
the msk receive path after __mptcp_close_ssk().
Fixes: e16163b6e2 ("mptcp: refactor shutdown and close")
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When a MPTCP listener socket is closed with unaccepted
children pending, the ULP release callback will be invoked,
but nobody will call into __mptcp_close_ssk() on the
corresponding subflow.
As a consequence, at ULP release time, the 'disposable' flag
will be cleared and the subflow context memory will be leaked.
This change addresses the issue always freeing the context if
the subflow is still in the accept queue at ULP release time.
Additionally, this fixes an incorrect code reference in the
related comment.
Note: this fix leverages the changes introduced by the previous
commit.
Fixes: e16163b6e2 ("mptcp: refactor shutdown and close")
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Christoph reported the following splat:
WARNING: CPU: 0 PID: 4615 at net/ipv4/inet_connection_sock.c:1031 inet_csk_listen_stop+0x8e8/0xad0 net/ipv4/inet_connection_sock.c:1031
Modules linked in:
CPU: 0 PID: 4615 Comm: syz-executor.4 Not tainted 5.9.0 #37
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
RIP: 0010:inet_csk_listen_stop+0x8e8/0xad0 net/ipv4/inet_connection_sock.c:1031
Code: 03 00 00 00 e8 79 b2 3d ff e9 ad f9 ff ff e8 1f 76 ba fe be 02 00 00 00 4c 89 f7 e8 62 b2 3d ff e9 14 f9 ff ff e8 08 76 ba fe <0f> 0b e9 97 f8 ff ff e8 fc 75 ba fe be 03 00 00 00 4c 89 f7 e8 3f
RSP: 0018:ffffc900037f7948 EFLAGS: 00010293
RAX: ffff88810a349c80 RBX: ffff888114ee1b00 RCX: ffffffff827b14cd
RDX: 0000000000000000 RSI: ffffffff827b1c38 RDI: 0000000000000005
RBP: ffff88810a2a8000 R08: ffff88810a349c80 R09: fffff520006fef1f
R10: 0000000000000003 R11: fffff520006fef1e R12: ffff888114ee2d00
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff888114ee1d68
FS: 00007f2ac1945700(0000) GS:ffff88811b400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd44798bc0 CR3: 0000000109810002 CR4: 0000000000170ef0
Call Trace:
__tcp_close+0xd86/0x1110 net/ipv4/tcp.c:2433
__mptcp_close_ssk+0x256/0x430 net/mptcp/protocol.c:1761
__mptcp_destroy_sock+0x49b/0x770 net/mptcp/protocol.c:2127
mptcp_close+0x62d/0x910 net/mptcp/protocol.c:2184
inet_release+0xe9/0x1f0 net/ipv4/af_inet.c:434
__sock_release+0xd2/0x280 net/socket.c:596
sock_close+0x15/0x20 net/socket.c:1277
__fput+0x276/0x960 fs/file_table.c:281
task_work_run+0x109/0x1d0 kernel/task_work.c:151
get_signal+0xe8f/0x1d40 kernel/signal.c:2561
arch_do_signal+0x88/0x1b60 arch/x86/kernel/signal.c:811
exit_to_user_mode_loop kernel/entry/common.c:161 [inline]
exit_to_user_mode_prepare+0x9b/0xf0 kernel/entry/common.c:191
syscall_exit_to_user_mode+0x22/0x150 kernel/entry/common.c:266
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f2ac1254469
Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ff 49 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007f2ac1944dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffbf RBX: 000000000069bf00 RCX: 00007f2ac1254469
RDX: 0000000000000000 RSI: 0000000000008982 RDI: 0000000000000003
RBP: 000000000069bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000069bf0c
R13: 00007ffeb53f178f R14: 00000000004668b0 R15: 0000000000000003
After commit 0397c6d85f ("mptcp: keep unaccepted MPC subflow into
join list"), the msk's workqueue and/or PM can touch the MPC
subflow - and acquire its socket lock - even if it's still unaccepted.
If the above event races with the relevant listener socket close, we
can end-up with the above splat.
This change addresses the issue delaying the MPC socket insertion
in conn_list at accept time - that is, partially reverting the
blamed commit.
We must additionally ensure that mptcp_pm_fully_established()
happens after accept() time, or the PM will not be able to
handle properly such event - conn_list could be empty otherwise.
In the receive path, we check the subflow list node to ensure
it is out of the listener queue. Be sure client subflows do
not match transiently such condition moving them into the join
list earlier at creation time.
Since we now have multiple mptcp_pm_fully_established() call sites
from different code-paths, said helper can now race with itself.
Use an additional PM status bit to avoid multiple notifications.
Reported-by: Christoph Paasch <cpaasch@apple.com>
Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/103
Fixes: 0397c6d85f ("mptcp: keep unaccepted MPC subflow into join list"),
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since the local variable sk has been defined, use it instead of
open-coding.
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since the RM_ADDR signal had been reused with add_addr_signal, it's not
suitable to call it add_addr_signal or mptcp_add_addr_status. So this
patch renamed add_addr_signal to addr_signal, and renamed
mptcp_add_addr_status to mptcp_addr_signal_status.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch reused add_addr_signal for the RM_ADDR announcing signal, by
defining a new ADD_ADDR status named MPTCP_RM_ADDR_SIGNAL. Then the flag
rm_addr_signal in PM could be dropped.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch printed out more debugging information for the ADD_ADDR
suboption parsing on the incoming path.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch added a new parameter 'port' for mptcp_pm_announce_addr. If
this parameter is true, we set the MPTCP_ADD_ADDR_PORT bit of the
add_addr_signal. That means the announced address is added with a port
number.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The process is similar to that of the ADD_ADDR IPv6, this patch also sent
out a pure ack for the ADD_ADDR using port.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch added a new add_addr_signal type named MPTCP_ADD_ADDR_PORT,
to identify it is an address with port to be added.
It also added a new parameter 'port' for both mptcp_add_addr_len and
mptcp_pm_add_addr_signal.
In mptcp_established_options_add_addr, we check whether the announced
address is added with port. If it is, we put this port number to
mptcp_out_options's port field.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch uses adding up size to get the ADD_ADDR suboption length rather
than returning the ADD_ADDR size constants.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In rfc8684, the length of ADD_ADDR suboption with IPv4 address and port
is 18 octets, but mptcp_write_options is 32-bit aligned, so we need to
pad it to 20 octets. All the other port related option lengths need to
be added up 2 octets similarly.
This patch added a new field 'port' in mptcp_out_options. When this
field is set with a port number, we need to add up 4 octets for the
ADD_ADDR suboption, and put the port number into the suboption.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The length of ADD_ADDR6 is 12 octets longer than ADD_ADDR. That's the
only difference between them.
This patch dropped the duplicate code between ADD_ADDR and ADD_ADDR6
suboptions writing, and unify them into one.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There are two differences between ADD_ADDR suboption and ADD_ADDR echo
suboption: The length of the former is 8 octets longer than the length
of the latter. The former's echo-flag is 0, and latter's echo-flag is 1.
This patch added two local variables, len and echo, to unify ADD_ADDR
and ADD_ADDR echo suboptions writing.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pablo Neira Ayuso says:
====================
Netfilter fixes for net
The following patchset contains Netfilter fixes for net:
1) Switch to RCU in x_tables to fix possible NULL pointer dereference,
from Subash Abhinov Kasiviswanathan.
2) Fix netlink dump of dynset timeouts later than 23 days.
3) Add comment for the indirect serialization of the nft commit mutex
with rtnl_mutex.
4) Remove bogus check for confirmed conntrack when matching on the
conntrack ID, from Brett Mastbergen.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Replace a comma between expression statements by a semicolon.
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When cwnd is not a multiple of the TSO skb size of N*MSS, we can get
into persistent scenarios where we have the following sequence:
(1) ACK for full-sized skb of N*MSS arrives
-> tcp_write_xmit() transmit full-sized skb with N*MSS
-> move pacing release time forward
-> exit tcp_write_xmit() because pacing time is in the future
(2) TSQ callback or TCP internal pacing timer fires
-> try to transmit next skb, but TSO deferral finds remainder of
available cwnd is not big enough to trigger an immediate send
now, so we defer sending until the next ACK.
(3) repeat...
So we can get into a case where we never mark ourselves as
cwnd-limited for many seconds at a time, even with
bulk/infinite-backlog senders, because:
o In case (1) above, every time in tcp_write_xmit() we have enough
cwnd to send a full-sized skb, we are not fully using the cwnd
(because cwnd is not a multiple of the TSO skb size). So every time we
send data, we are not cwnd limited, and so in the cwnd-limited
tracking code in tcp_cwnd_validate() we mark ourselves as not
cwnd-limited.
o In case (2) above, every time in tcp_write_xmit() that we try to
transmit the "remainder" of the cwnd but defer, we set the local
variable is_cwnd_limited to true, but we do not send any packets, so
sent_pkts is zero, so we don't call the cwnd-limited logic to update
tp->is_cwnd_limited.
Fixes: ca8a226343 ("tcp: make cwnd-limited checks measurement-based, and gentler")
Reported-by: Ingemar Johansson <ingemar.s.johansson@ericsson.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20201209035759.1225145-1-ncardwell.kernel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The offending commit introduces a cleanup callback that is invoked
when the driver module is removed to clean up the tunnel device
flow block. But it returns on the first iteration of the for loop.
The remaining indirect flow blocks will never be freed.
Fixes: 1fac52da59 ("net: flow_offload: consolidate indirect flow_block infrastructure")
CC: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
For DCTCP, we have to retain the ECT bits set by the congestion control
algorithm on the socket when reflecting syn TOS in syn-ack, in order to
make ECN work properly.
Fixes: ac8f1710c1 ("tcp: reflect tos value received in SYN to the socket")
Reported-by: Alexander Duyck <alexanderduyck@fb.com>
Signed-off-by: Wei Wang <weiwan@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Syzbot reported a stack overflow in bitmap_from_arr32() called from
ethnl_parse_bitset() when bitset from netlink message is longer than
target bitmap length. While ethnl_compact_sanity_checks() makes sure that
trailing part is all zeros (i.e. the request does not try to touch bits
kernel does not recognize), we also need to cap change_bits to nbits so
that we don't try to write past the prepared bitmaps.
Fixes: 88db6d1e4f ("ethtool: add ethnl_parse_bitset() helper")
Reported-by: syzbot+9d39fa49d4df294aab93@syzkaller.appspotmail.com
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Link: https://lore.kernel.org/r/3487ee3a98e14cd526f55b6caaa959d2dcbcad9f.1607465316.git.mkubecek@suse.cz
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The isotp socket can be widely configured in its behaviour regarding addressing
types, fill-ups, receive pattern tests and link layer length. Usually all
these settings need to be fixed before bind() and can not be changed
afterwards.
This patch adds a check to enforce the common usage pattern.
Fixes: e057dd3fc2 ("can: add ISO 15765-2:2016 transport protocol")
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Tested-by: Thomas Wagner <thwa1@web.de>
Link: https://lore.kernel.org/r/20201203140604.25488-2-socketcan@hartkopp.net
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://lore.kernel.org/r/20201204133508.742120-3-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Since commit 7f0a838254 ("bpf, xdp: Maintain info on attached XDP BPF
programs in net_device"), the XDP program attachment info is now maintained
in the core code. This interacts badly with the xdp_attachment_flags_ok()
check that prevents unloading an XDP program with different load flags than
it was loaded with. In practice, two kinds of failures are seen:
- An XDP program loaded without specifying a mode (and which then ends up
in driver mode) cannot be unloaded if the program mode is specified on
unload.
- The dev_xdp_uninstall() hook always calls the driver callback with the
mode set to the type of the program but an empty flags argument, which
means the flags_ok() check prevents the program from being removed,
leading to bpf prog reference leaks.
The original reason this check was added was to avoid ambiguity when
multiple programs were loaded. With the way the checks are done in the core
now, this is quite simple to enforce in the core code, so let's add a check
there and get rid of the xdp_attachment_flags_ok() callback entirely.
Fixes: 7f0a838254 ("bpf, xdp: Maintain info on attached XDP BPF programs in net_device")
Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/bpf/160752225751.110217.10267659521308669050.stgit@toke.dk
There's no need to defer allocation of pages for the receive buffer.
- This upcall is quite infrequent
- gssp_alloc_receive_pages() can allocate the pages with GFP_KERNEL,
unlike the transport
- gssp_alloc_receive_pages() knows exactly how many pages are needed
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Reviewed-by: Olga Kornievskaia <kolga@netapp.com>
We can simplify code around cache_downcall unifying memory
allocations using kvmalloc. This has the benefit of getting rid of
cache_slow_downcall (and queue_io_mutex), and also matches userland
allocation size and limits.
Signed-off-by: Roberto Bergantinos Corpas <rbergant@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Since commit 656c8e9cc1 ("netfilter: conntrack: Use consistent ct id
hash calculation") the ct id will not change from initialization to
confirmation. Removing the confirmation check allows for things like
adding an element to a 'typeof ct id' set in prerouting upon reception
of the first packet of a new connection, and then being able to
reference that set consistently both before and after the connection
is confirmed.
Fixes: 656c8e9cc1 ("netfilter: conntrack: Use consistent ct id hash calculation")
Signed-off-by: Brett Mastbergen <brett.mastbergen@gmail.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This moves the bpf_sock_from_file definition into net/core/filter.c
which only gets compiled with CONFIG_NET and also moves the helper proto
usage next to other tracing helpers that are conditional on CONFIG_NET.
This avoids
ld: kernel/trace/bpf_trace.o: in function `bpf_sock_from_file':
bpf_trace.c:(.text+0xe23): undefined reference to `sock_from_file'
When compiling a kernel with BPF and without NET.
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Florent Revest <revest@chromium.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: KP Singh <kpsingh@kernel.org>
Link: https://lore.kernel.org/bpf/20201208173623.1136863-1-revest@chromium.org
Before commit a337531b94 ("tcp: up initial rmem to 128KB and SYN rwin to around 64KB")
small tcp_rmem[1] values were overridden by tcp_fixup_rcvbuf() to accommodate various MSS.
This is no longer the case, and Hazem Mohamed Abuelfotoh reported
that DRS would not work for MTU 9000 endpoints receiving regular (1500 bytes) frames.
Root cause is that tcp_init_buffer_space() uses tp->rcv_wnd for upper limit
of rcvq_space.space computation, while it can select later a smaller
value for tp->rcv_ssthresh and tp->window_clamp.
ss -temoi on receiver would show :
skmem:(r0,rb131072,t0,tb46080,f0,w0,o0,bl0,d0) rcv_space:62496 rcv_ssthresh:56596
This means that TCP can not increase its window in tcp_grow_window(),
and that DRS can never kick.
Fix this by making sure that rcvq_space.space is not bigger than number of bytes
that can be held in TCP receive queue.
People unable/unwilling to change their kernel can work around this issue by
selecting a bigger tcp_rmem[1] value as in :
echo "4096 196608 6291456" >/proc/sys/net/ipv4/tcp_rmem
Based on an initial report and patch from Hazem Mohamed Abuelfotoh
https://lore.kernel.org/netdev/20201204180622.14285-1-abuehaze@amazon.com/
Fixes: a337531b94 ("tcp: up initial rmem to 128KB and SYN rwin to around 64KB")
Fixes: 041a14d267 ("tcp: start receiver buffer autotuning sooner")
Reported-by: Hazem Mohamed Abuelfotoh <abuehaze@amazon.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Simplify the return expression.
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Reviewed-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There is a spelling mistake in the Kconfig help text. Fix it.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Johan Hedberg says:
====================
pull request: bluetooth-next 2020-12-07
Here's the main bluetooth-next pull request for the 5.11 kernel.
- Updated Bluetooth entries in MAINTAINERS to include Luiz von Dentz
- Added support for Realtek 8822CE and 8852A devices
- Added support for MediaTek MT7615E device
- Improved workarounds for fake CSR devices
- Fix Bluetooth qualification test case L2CAP/COS/CFD/BV-14-C
- Fixes for LL Privacy support
- Enforce 16 byte encryption key size for FIPS security level
- Added new mgmt commands for extended advertising support
- Multiple other smaller fixes & improvements
Please let me know if there are any issues pulling. Thanks.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
`tipc_node_apply_property` does a null check on a `tipc_link_entry`
pointer but also accesses the same pointer out of the null check block.
This triggers a warning on Coverity Static Analyzer because we're
implying that `e->link` can BE null.
Move "Update MTU for node link entry" line into if block to make sure
that we're not in a state that `e->link` is null.
Signed-off-by: Cengiz Can <cengiz@kernel.wtf>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add an explicit comment in the code to describe the indirect
serialization of the holders of the commit_mutex with the rtnl_mutex.
Commit 90d2723c6d ("netfilter: nf_tables: do not hold reference on
netdevice from preparation phase") already describes this, but a comment
in this case is better for reference.
Reported-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Use nf_msecs_to_jiffies64 and nf_jiffies64_to_msecs as provided by
8e1102d5a1 ("netfilter: nf_tables: support timeouts larger than 23
days"), otherwise ruleset listing breaks.
Fixes: a8b1e36d0d ("netfilter: nft_dynset: fix element timeout for HZ != 1000")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
These warnings become somewhat more informative when they include the
MTU value that could not be set and not just the errno.
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Link: https://lore.kernel.org/r/20201205133944.10182-1-rasmus.villemoes@prevas.dk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
In AF_XDP the socket state needs to be checked, prior touching the
members of the socket. This was not the case for the recvmsg
implementation. Fix that by moving the xsk_is_bound() call.
Fixes: 45a8668184 ("xsk: Add support for recvmsg()")
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Magnus Karlsson <magnus.karlsson@intel.com>
Link: https://lore.kernel.org/bpf/20201207082008.132263-1-bjorn.topel@gmail.com
When running concurrent iptables rules replacement with data, the per CPU
sequence count is checked after the assignment of the new information.
The sequence count is used to synchronize with the packet path without the
use of any explicit locking. If there are any packets in the packet path using
the table information, the sequence count is incremented to an odd value and
is incremented to an even after the packet process completion.
The new table value assignment is followed by a write memory barrier so every
CPU should see the latest value. If the packet path has started with the old
table information, the sequence counter will be odd and the iptables
replacement will wait till the sequence count is even prior to freeing the
old table info.
However, this assumes that the new table information assignment and the memory
barrier is actually executed prior to the counter check in the replacement
thread. If CPU decides to execute the assignment later as there is no user of
the table information prior to the sequence check, the packet path in another
CPU may use the old table information. The replacement thread would then free
the table information under it leading to a use after free in the packet
processing context-
Unable to handle kernel NULL pointer dereference at virtual
address 000000000000008e
pc : ip6t_do_table+0x5d0/0x89c
lr : ip6t_do_table+0x5b8/0x89c
ip6t_do_table+0x5d0/0x89c
ip6table_filter_hook+0x24/0x30
nf_hook_slow+0x84/0x120
ip6_input+0x74/0xe0
ip6_rcv_finish+0x7c/0x128
ipv6_rcv+0xac/0xe4
__netif_receive_skb+0x84/0x17c
process_backlog+0x15c/0x1b8
napi_poll+0x88/0x284
net_rx_action+0xbc/0x23c
__do_softirq+0x20c/0x48c
This could be fixed by forcing instruction order after the new table
information assignment or by switching to RCU for the synchronization.
Fixes: 80055dab5d ("netfilter: x_tables: make xt_replace_table wait until old rules are not used anymore")
Reported-by: Sean Tranchetti <stranche@codeaurora.org>
Reported-by: kernel test robot <lkp@intel.com>
Suggested-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Steffen Klassert says:
====================
pull request (net): ipsec 2020-12-07
1) Sysbot reported fixes for the new 64/32 bit compat layer.
From Dmitry Safonov.
2) Fix a memory leak in xfrm_user_policy that was introduced
by adding the 64/32 bit compat layer. From Yu Kuai.
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec:
net: xfrm: fix memory leak in xfrm_user_policy()
xfrm/compat: Don't allocate memory with __GFP_ZERO
xfrm/compat: memset(0) 64-bit padding at right place
xfrm/compat: Translate by copying XFRMA_UNSPEC attribute
====================
Link: https://lore.kernel.org/r/20201207093937.2874932-1-steffen.klassert@secunet.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When do cat /proc/net/netstat, the output isn't append with a new line, it looks like this:
[root@localhost ~]# cat /proc/net/netstat
...
MPTcpExt: 0 0 0 0 0 0 0 0 0 0 0 0 0[root@localhost ~]#
This is because in mptcp_seq_show(), if mptcp isn't in use, net->mib.mptcp_statistics is NULL,
so it just puts all 0 after "MPTcpExt:", and return, forgot the '\n'.
After this patch:
[root@localhost ~]# cat /proc/net/netstat
...
MPTcpExt: 0 0 0 0 0 0 0 0 0 0 0 0 0
[root@localhost ~]#
Fixes: fc518953bc ("mptcp: add and use MIB counter infrastructure")
Signed-off-by: Jianguo Wu <wujianguo@chinatelecom.cn>
Acked-by: Florian Westphal <fw@strlen.de>
Link: https://lore.kernel.org/r/142e2fd9-58d9-bb13-fb75-951cccc2331e@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When enabling multicast snooping, bridge module deadlocks on multicast_lock
if 1) IPv6 is enabled, and 2) there is an existing querier on the same L2
network.
The deadlock was caused by the following sequence: While holding the lock,
br_multicast_open calls br_multicast_join_snoopers, which eventually causes
IP stack to (attempt to) send out a Listener Report (in igmp6_join_group).
Since the destination Ethernet address is a multicast address, br_dev_xmit
feeds the packet back to the bridge via br_multicast_rcv, which in turn
calls br_multicast_add_group, which then deadlocks on multicast_lock.
The fix is to move the call br_multicast_join_snoopers outside of the
critical section. This works since br_multicast_join_snoopers only deals
with IP and does not modify any multicast data structures of the bridge,
so there's no need to hold the lock.
Steps to reproduce:
1. sysctl net.ipv6.conf.all.force_mld_version=1
2. have another querier
3. ip link set dev bridge type bridge mcast_snooping 0 && \
ip link set dev bridge type bridge mcast_snooping 1 < deadlock >
A typical call trace looks like the following:
[ 936.251495] _raw_spin_lock+0x5c/0x68
[ 936.255221] br_multicast_add_group+0x40/0x170 [bridge]
[ 936.260491] br_multicast_rcv+0x7ac/0xe30 [bridge]
[ 936.265322] br_dev_xmit+0x140/0x368 [bridge]
[ 936.269689] dev_hard_start_xmit+0x94/0x158
[ 936.273876] __dev_queue_xmit+0x5ac/0x7f8
[ 936.277890] dev_queue_xmit+0x10/0x18
[ 936.281563] neigh_resolve_output+0xec/0x198
[ 936.285845] ip6_finish_output2+0x240/0x710
[ 936.290039] __ip6_finish_output+0x130/0x170
[ 936.294318] ip6_output+0x6c/0x1c8
[ 936.297731] NF_HOOK.constprop.0+0xd8/0xe8
[ 936.301834] igmp6_send+0x358/0x558
[ 936.305326] igmp6_join_group.part.0+0x30/0xf0
[ 936.309774] igmp6_group_added+0xfc/0x110
[ 936.313787] __ipv6_dev_mc_inc+0x1a4/0x290
[ 936.317885] ipv6_dev_mc_inc+0x10/0x18
[ 936.321677] br_multicast_open+0xbc/0x110 [bridge]
[ 936.326506] br_multicast_toggle+0xec/0x140 [bridge]
Fixes: 4effd28c12 ("bridge: join all-snoopers multicast address")
Signed-off-by: Joseph Huang <Joseph.Huang@garmin.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Link: https://lore.kernel.org/r/20201204235628.50653-1-Joseph.Huang@garmin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
migrate_disable() is just a wrapper for preempt_disable() in
non-RT kernel. It is safe to replace it, and RT kernel will
benefit.
Note that it is introduced since Feb 2020.
Suggested-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Signed-off-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201205075946.497763-2-xiyou.wangcong@gmail.com
The per-cpu bpf_redirect_info is shared among all skb_do_redirect()
and BPF redirect helpers. Callers on RX path are all in BH context,
disabling preemption is not sufficient to prevent BH interruption.
In production, we observed strange packet drops because of the race
condition between LWT xmit and TC ingress, and we verified this issue
is fixed after we disable BH.
Although this bug was technically introduced from the beginning, that
is commit 3a0af8fd61 ("bpf: BPF for lightweight tunnel infrastructure"),
at that time call_rcu() had to be call_rcu_bh() to match the RCU context.
So this patch may not work well before RCU flavor consolidation has been
completed around v5.0.
Update the comments above the code too, as call_rcu() is now BH friendly.
Signed-off-by: Dongdong Wang <wangdongdong.6@bytedance.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Cong Wang <cong.wang@bytedance.com>
Link: https://lore.kernel.org/bpf/20201205075946.497763-1-xiyou.wangcong@gmail.com
Increment the mgmt revision due to the recently added new commands.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
When suspending, mark SUSPEND_SCAN_ENABLE and SUSPEND_SCAN_DISABLE tasks
correctly when either classic or le scanning is modified.
Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Howard Chung <howardchung@google.com>
Reviewed-by: Alain Michaud <alainm@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
For advertising, we wish to know the LE tx power capabilities of the
controller in userspace, so this patch edits the Security Info MGMT
command to be more generic, such that other various controller
capabilities can be included in the EIR data. This change also includes
the LE min and max tx power into this newly-named command.
The change was tested by manually verifying that the MGMT command
returns the tx power range as expected in userspace.
Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Daniel Winkler <danielwinkler@google.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Queries tx power via HCI_LE_Read_Transmit_Power command when the hci
device is initialized, and stores resulting min/max LE power in hdev
struct. If command isn't available (< BT5 support), min/max values
both default to HCI_TX_POWER_INVALID.
This patch is manually verified by ensuring BT5 devices correctly query
and receive controller tx power range.
Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Daniel Winkler <danielwinkler@google.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This patch takes the min/max intervals and tx power optionally provided
in mgmt interface, stores them in the advertisement struct, and uses
them when configuring the hci requests. While tx power is not used if
extended advertising is unavailable, software rotation will use the min
and max advertising intervals specified by the client.
This change is validated manually by ensuring the min/max intervals are
propagated to the controller on both hatch (extended advertising) and
kukui (no extended advertising) chromebooks, and that tx power is
propagated correctly on hatch. These tests are performed with multiple
advertisements simultaneously.
Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Daniel Winkler <danielwinkler@google.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This patch adds support for the new advertising add interface, with the
first command setting advertising parameters and the second to set
advertising data. The set parameters command allows the caller to leave
some fields "unset", with a params bitfield defining which params were
purposefully set. Unset parameters will be given defaults when calling
hci_add_adv_instance. The data passed to the param mgmt command is
allowed to be flexible, so in the future if bluetoothd passes a larger
structure with new params, the mgmt command will ignore the unknown
members at the end.
This change has been validated on both hatch (extended advertising) and
kukui (no extended advertising) chromebooks running bluetoothd that
support this new interface. I ran the following manual tests:
- Set several (3) advertisements using modified test_advertisement.py
- For each, validate correct data and parameters in btmon trace
- Verified both for software rotation and extended adv
Automatic test suite also run, testing many (25) scenarios of single and
multi-advertising for data/parameter correctness.
Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Daniel Winkler <danielwinkler@google.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
We wish to handle advertising data separately from advertising
parameters in our new MGMT requests. This change adds a helper that
allows the advertising data and scan response to be updated for an
existing advertising instance.
Reviewed-by: Sonny Sasaka <sonnysasaka@chromium.org>
Signed-off-by: Daniel Winkler <danielwinkler@google.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This patch add a configurable parameter to switch off the interleave
scan feature.
Signed-off-by: Howard Chung <howardchung@google.com>
Reviewed-by: Alain Michaud <alainm@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Refactor read default system configuration function so that it's capable
of returning different types than u16
Signed-off-by: Howard Chung <howardchung@google.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
