net/sctp/protocol.c: In function ‘sctp_addr_wq_timeout_handler’:
net/sctp/protocol.c:676: warning: label ‘free_next’ defined but not used
Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
cmd_status, cmd_complete and mgmt_event functions are executed in
process context and they are not called inside atomic sections. Thus,
they should use GFP_KERNEL for memory allocation instead of GFP_ATOMIC.
Signed-off-by: Andre Guedes <aguedespe@gmail.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
We are allowed to sleep in mgmt_pending_add, so we should use
GFP_KERNEL for memory allocations instead of GFP_ATOMIC.
Signed-off-by: Andre Guedes <aguedespe@gmail.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
add_uuid and get_connections mgmt_handlers are executed by user
threads running in kernel-mode.
Signed-off-by: Andre Guedes <aguedespe@gmail.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Pablo says:
====================
The following patchset provides fixes for issues that were recently introduced
by my new cthelper infrastructure. They have been spotted by Randy Dunlap,
Andrew Morton and Dan Carpenter.
The patches provide:
* compilation fixes if CONFIG_NF_CONNTRACK is disabled: I moved all the
conntrack code from nfnetlink_queue.c to nfnetlink_queue_ct.c to avoid
peppering the entire code with lots of ifdefs. I needed to rename
nfnetlink_queue.c to nfnetlink_queue_core.c to get it working with the
Makefile tweaks I've added.
* fix NULL pointer dereference via ctnetlink while trying to change the helper
for an existing conntrack entry. I don't find any reasonable use case for
changing the helper from one to another in run-time. Thus, now ctnetlink
returns -EOPNOTSUPP for this operation.
* fix possible out-of-bound zeroing of the conntrack extension area due to
the helper automatic assignation routine.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit af7985bf85 introduced regression
resulting in complie warnings:
...
net/bluetooth/mgmt.c:3568:27: warning: invalid assignment: |=
net/bluetooth/mgmt.c:3568:27: left side has type restricted __le32
net/bluetooth/mgmt.c:3568:27: right side has type int
net/bluetooth/mgmt.c:3570:27: warning: invalid assignment: |=
net/bluetooth/mgmt.c:3570:27: left side has type restricted __le32
net/bluetooth/mgmt.c:3570:27: right side has type int
net/bluetooth/mgmt.c:3580:21: warning: cast from restricted __le32
...
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
In "9cb0176 netfilter: add glue code to integrate nfnetlink_queue and ctnetlink"
the compilation with NF_CONNTRACK disabled is broken. This patch fixes this
issue.
I have moved the conntrack part into nfnetlink_queue_ct.c to avoid
peppering the entire nfnetlink_queue.c code with ifdefs.
I also needed to rename nfnetlink_queue.c to nfnetlink_queue_pkt.c
to update the net/netfilter/Makefile to support conditional compilation
of the conntrack integration.
This patch also adds CONFIG_NETFILTER_QUEUE_CT in case you want to explicitly
disable the integration between nf_conntrack and nfnetlink_queue.
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
/proc/net/ipv6_route reflects the contents of fib_table_hash. The proc
handler is installed in ip6_route_net_init() whereas fib_table_hash is
allocated in fib6_net_init() _after_ the proc handler has been installed.
This opens up a short time frame to access fib_table_hash with its pants
down.
Move the registration of the proc files to a later point in the init
order to avoid the race.
Tested :-)
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch fixes the compilation of net/netfilter/nfnetlink_cthelper.c
if CONFIG_NF_CONNTRACK is not set.
This patch also moves the definition of the cthelper infrastructure to
the scope of NF_CONNTRACK things.
I have also renamed NETFILTER_NETLINK_CTHELPER by NF_CT_NETLINK_HELPER,
to use similar names to other nf_conntrack_netlink extensions. Better now
that this has been only for two days in David's tree.
Two new dependencies have been added:
* NF_CT_NETLINK
* NETFILTER_NETLINK_QUEUE
Since these infrastructure requires both ctnetlink and nfqueue.
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This patch modifies __nf_ct_try_assign_helper in a way that invalidates support
for the following scenario:
1) attach the helper A for first time when the conntrack is created
2) attach new (different) helper B due to changes the reply tuple caused by NAT
eg. port redirection from TCP/21 to TCP/5060 with both FTP and SIP helpers
loaded, which seems to be a quite unorthodox scenario.
I can provide a more elaborated patch to support this scenario but explicit
helper attachment provides a better solution for this since now the use can
attach the helpers consistently, without relying on the automatic helper
lookup magic.
This patch fixes a possible out of bound zeroing of the conntrack helper
extension if the helper B uses more memory for its private data than
helper A.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
The patch 1afc56794e: "netfilter: nf_ct_helper: implement variable
length helper private data" from Jun 7, 2012, leads to the following
Smatch complaint:
net/netfilter/nf_conntrack_netlink.c:1231 ctnetlink_change_helper()
error: we previously assumed 'help->helper' could be null (see line 1228)
This NULL dereference can be triggered with the following sequence:
1) attach the helper for first time when the conntrack is created.
2) remove the helper module or detach the helper from the conntrack
via ctnetlink.
3) attach helper again (the same or different one, no matter) to the
that existing conntrack again via ctnetlink.
This patch fixes the problem by removing the use case that allows you
to re-assign again a helper for one conntrack entry via ctnetlink since
I cannot find any practical use for it.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Pull a 9p bugfix from Eric Van Hensbergen.
* 'v9fs-devel' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
9p: BUG before corrupting memory
This patch fixes the problem of dropping RANN element if the TTL
is 1. If the received RANN element TTL is 1 or greater than 1, the
RANN is processed. However, forwarding of received RANN element
with TTL 1 or less is prohibited according to the standard. This
is previously reported by Monthadar Al Jaberi.
Besides, this patch also avoid the processing of unicast PREQ
generation if the RANN element does not meet the acceptance
criteria mentioned in Sec. 13.10.12.4.2 of IEEE Std. 802.11-2012.
Reported-by: Monthadar Al Jaberi <monthadar@gmail.com>
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Some APs experience problems when working with U-APSD. Decrease the
probability of that happening by using legacy mode for all ACs but VO.
The AP that caused us troubles was a Cisco 4410N. It ignores our
setting, and always treats non-VO ACs as legacy.
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
While HW reconfig is in progress, drop all incoming Rx. This prevents
incoming packets from changing the internal state of the driver or
calling callbacks of the low level driver while it is in inconsistent
state.
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
To ensure an entry isn't added twice all comparisons have to be protected by the
hash line write spinlock. This doesn't really hurt as the case that it is tried
to add an element already present to the hash shouldn't occur very often, so in
most cases the lock would have have to be taken anyways.
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Acked-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Each time a new log level is added the developer must change either the DBG_ALL
enum definition and the hard coded value in the bat_sysfs.c for the log_level
attribute max value. This is extremely error prone.
With this patch the code directly uses DBG_ALL in the sysfs definition
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Prior to this patch the translation table code made assumptions about how
the routing protocol works and where its buffers are stored (to directly
modify them).
Each protocol now calls the tt code with the relevant pointers, thereby
abstracting the code.
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Acked-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
The primary entry and the corresponding secondary entries are missing when there
are no neighbors on the primary interface. This also causes the TT entries to
miss and makes nodes with multiply secondary interface fall apart since there
is no way to see they are related without a primary entry.
Fix this by always emitting a primary entry.
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
just keep it net-endian all along
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
[lindner_marek@yahoo.de: fix checkpatch warnings]
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
memcpy() arguments are void *, precisely to avoid that kind of pointless
casts.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Added additional counters in a bat_stats structure, which are exported
through the ethtool api. The counters are specific to batman-adv and
includes:
forwarded packets and bytes
management packets and bytes (aggregated OGMs at this point)
translation table packets
New counters are added by extending "enum bat_counters" in types.h and
adding corresponding descriptive string(s) to bat_counters_strings in
soft-iface.c.
Counters are increased by calling batadv_add_counter() and incremented
by one by calling batadv_inc_counter().
Signed-off-by: Martin Hundebøll <martin@hundeboll.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
In the code we neever need to atomically check and set the bat_priv->tt_crc
field value. It is simply set and read once in different pieces of the code.
Therefore this field can be safely be converted from atomic_t to uint16_t.
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
The hash for claim and backbone hash in the bridge loop avoidance code receive
the same key because they are getting initialized by hash_new with the same
key. Lockdep will create a backtrace when they are used recursively. This can
be avoided by reinitializing the key directly after the hash_new.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
skb_linearize(skb) possibly rearranges the skb internal data and then changes
the skb->data pointer value. For this reason any other pointer in the code that
was assigned skb->data before invoking skb_linearise(skb) must be re-assigned.
In the current tt_query message handling code this is not done and therefore, in
case of skb linearization, the pointer used to handle the packet header ends up
in pointing to poisoned memory. The packet is then dropped but the
translation-table mechanism is corrupted.
Signed-off-by: Antonio Quartulli <ordex@autistici.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
As defined in section 13.10.9.3 Case D (802.11-2012), this
control variable is used to limit the mesh STA to send only
one PREQ to a root mesh STA within this interval of time
(in TUs). The default value for this variable is set to
2000 TUs. However, for current implementation, the maximum
configurable of dot11MeshHWMPconfirmationInterval is
restricted by dot11MeshHWMPactivePathTimeout.
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
[line-break commit log]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
mesh_path_root_timer is invoked once the dot11MeshHWMPRootMode
is larger than 1. This patch also adds the backward compatible
to the previous setting on dot11MeshHWMPRootMode. If the user
configures as follow, it will still trigger the proactive RANN
with Gate Announcement.
iw mesh0 set mesh_param mesh_hwmp_rootmode 1
iw mesh0 set mesh_param mesh_gate_announcements 1
similar to the following setting:
iw mesh0 set mesh_param mesh_hwmp_rootmode 4
iw mesh0 set mesh_param mesh_gate_announcements 1
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
[line-break commit log]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Generate the proactive PREP element in Proactive PREQ mode as
defined in Sec. 13.10.10.3 (Case D) of IEEE Std. 802.11-2012.
Signed-off-by: Chun-Yeow Yeoh <yeohchunyeow@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
It makes no sense to execute this limit test every time we create a
routing cache entry.
We can't simply error out on these things since we've silently
accepted and truncated them forever.
Signed-off-by: David S. Miller <davem@davemloft.net>
Pablo says:
====================
This is the second batch of Netfilter updates for net-next. It contains the
kernel changes for the new user-space connection tracking helper
infrastructure.
More details on this infrastructure are provides here:
http://lwn.net/Articles/500196/
Still, I plan to provide some official documentation through the
conntrack-tools user manual on how to setup user-space utilities for this.
So far, it provides two helper in user-space, one for NFSv3 and another for
Oracle/SQLnet/TNS. Yet in my TODO list.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
There are good reasons to supports helpers in user-space instead:
* Rapid connection tracking helper development, as developing code
in user-space is usually faster.
* Reliability: A buggy helper does not crash the kernel. Moreover,
we can monitor the helper process and restart it in case of problems.
* Security: Avoid complex string matching and mangling in kernel-space
running in privileged mode. Going further, we can even think about
running user-space helpers as a non-root process.
* Extensibility: It allows the development of very specific helpers (most
likely non-standard proprietary protocols) that are very likely not to be
accepted for mainline inclusion in the form of kernel-space connection
tracking helpers.
This patch adds the infrastructure to allow the implementation of
user-space conntrack helpers by means of the new nfnetlink subsystem
`nfnetlink_cthelper' and the existing queueing infrastructure
(nfnetlink_queue).
I had to add the new hook NF_IP6_PRI_CONNTRACK_HELPER to register
ipv[4|6]_helper which results from splitting ipv[4|6]_confirm into
two pieces. This change is required not to break NAT sequence
adjustment and conntrack confirmation for traffic that is enqueued
to our user-space conntrack helpers.
Basic operation, in a few steps:
1) Register user-space helper by means of `nfct':
nfct helper add ftp inet tcp
[ It must be a valid existing helper supported by conntrack-tools ]
2) Add rules to enable the FTP user-space helper which is
used to track traffic going to TCP port 21.
For locally generated packets:
iptables -I OUTPUT -t raw -p tcp --dport 21 -j CT --helper ftp
For non-locally generated packets:
iptables -I PREROUTING -t raw -p tcp --dport 21 -j CT --helper ftp
3) Run the test conntrackd in helper mode (see example files under
doc/helper/conntrackd.conf
conntrackd
4) Generate FTP traffic going, if everything is OK, then conntrackd
should create expectations (you can check that with `conntrack':
conntrack -E expect
[NEW] 301 proto=6 src=192.168.1.136 dst=130.89.148.12 sport=0 dport=54037 mask-src=255.255.255.255 mask-dst=255.255.255.255 sport=0 dport=65535 master-src=192.168.1.136 master-dst=130.89.148.12 sport=57127 dport=21 class=0 helper=ftp
[DESTROY] 301 proto=6 src=192.168.1.136 dst=130.89.148.12 sport=0 dport=54037 mask-src=255.255.255.255 mask-dst=255.255.255.255 sport=0 dport=65535 master-src=192.168.1.136 master-dst=130.89.148.12 sport=57127 dport=21 class=0 helper=ftp
This confirms that our test helper is receiving packets including the
conntrack information, and adding expectations in kernel-space.
The user-space helper can also store its private tracking information
in the conntrack structure in the kernel via the CTA_HELP_INFO. The
kernel will consider this a binary blob whose layout is unknown. This
information will be included in the information that is transfered
to user-space via glue code that integrates nfnetlink_queue and
ctnetlink.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
User-space programs that receive traffic via NFQUEUE may mangle packets.
If NAT is enabled, this usually puzzles sequence tracking, leading to
traffic disruptions.
With this patch, nfnl_queue will make the corresponding NAT TCP sequence
adjustment if:
1) The packet has been mangled,
2) the NFQA_CFG_F_CONNTRACK flag has been set, and
3) NAT is detected.
There are some records on the Internet complaning about this issue:
http://stackoverflow.com/questions/260757/packet-mangling-utilities-besides-iptables
By now, we only support TCP since we have no helpers for DCCP or SCTP.
Better to add this if we ever have some helper over those layer 4 protocols.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This patch allows you to include the conntrack information together
with the packet that is sent to user-space via NFQUEUE.
Previously, there was no integration between ctnetlink and
nfnetlink_queue. If you wanted to access conntrack information
from your libnetfilter_queue program, you required to query
ctnetlink from user-space to obtain it. Thus, delaying the packet
processing even more.
Including the conntrack information is optional, you can set it
via NFQA_CFG_F_CONNTRACK flag with the new NFQA_CFG_FLAGS attribute.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This patch uses the new variable length conntrack extensions.
Instead of using union nf_conntrack_help that contain all the
helper private data information, we allocate variable length
area to store the private helper data.
This patch includes the modification of all existing helpers.
It also includes a couple of include header to avoid compilation
warnings.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
We can now define conntrack extensions of variable size. This
patch is useful to get rid of these unions:
union nf_conntrack_help
union nf_conntrack_proto
union nf_conntrack_nat_help
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This patch modifies the struct nf_conntrack_helper to allocate
the room for the helper name. The maximum length is 16 bytes
(this was already introduced in 2.6.24).
For the maximum length for expectation policy names, I have
also selected 16 bytes.
This patch is required by the follow-up patch to support
user-space connection tracking helpers.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
