Commit Graph

4104 Commits

Author SHA1 Message Date
Markus Elfring
5d4acfc141 Bluetooth: Delete error messages for failed memory allocations in two functions
Omit two extra messages for memory allocation failures in these functions.

This issue was detected by using the Coccinelle software.

Link: http://events.linuxfoundation.org/sites/events/files/slides/LCJ16-Refactor_Strings-WSang_0.pdf
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-05-22 10:23:41 +02:00
Marcel Holtmann
b56c7b2548 Bluetooth: Skip vendor diagnostic configuration for HCI User Channel
When the HCI User Channel access is requested, then do not try to
undermine it with vendor diagnostic configuration. The exclusive user
is required to configure its own vendor diagnostic in that case and
can not rely on the host stack support.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2017-05-18 13:52:49 +02:00
Marcel Holtmann
de2ba3039c Bluetooth: Set LE Default PHY preferences
If the LE Set Default PHY command is supported, the indicate to the
controller that the host has no preferences for transmitter PHY or
receiver PHY selection.

Issuing this command gives the controller a clear indication that other
PHY can be selected if available.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2017-05-18 13:52:49 +02:00
Marcel Holtmann
27bbca4402 Bluetooth: Enable LE PHY Update Complete event
If either LE Set Default PHY command or LE Set PHY commands is
supported, then enable the LE PHY Update Complete event.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2017-05-18 13:52:49 +02:00
Marcel Holtmann
9756d33b85 Bluetooth: Enable LE Channel Selection Algorithm event
If the Channel Selection Algorithm  feature is supported, then enable
the new LE Channel Selection Algorithm event.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2017-05-18 13:52:49 +02:00
Marcel Holtmann
122048752e Bluetooth: Set LE Suggested Default Data Length to maximum
When LE Data Packet Length Extension is supported, then actually
increase the suggested default data length to the maximum to enable
higher througput.

< HCI Command: LE Read Maximum Data Length (0x08|0x002f) plen 0
> HCI Event: Command Complete (0x0e) plen 12
      LE Read Maximum Data Length (0x08|0x002f) ncmd 1
        Status: Success (0x00)
        Max TX octets: 251
        Max TX time: 2120
        Max RX octets: 251
        Max RX time: 2120

< HCI Command: LE Read Suggested Default Data Length (0x08|0x0023) plen 0
> HCI Event: Command Complete (0x0e) plen 8
      LE Read Suggested Default Data Length (0x08|0x0023) ncmd 1
        Status: Success (0x00)
        TX octets: 27
        TX time: 328

< HCI Command: LE Write Suggested Default Data Length (0x08|0x0024) plen 4
        TX octets: 251
        TX time: 2120
> HCI Event: Command Complete (0x0e) plen 4
      LE Write Suggested Default Data Length (0x08|0x0024) ncmd 1
        Status: Success (0x00)

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2017-05-18 13:52:49 +02:00
linzhang
173e7837a2 net: socket: mark socket protocol handler structs as const
Signed-off-by: linzhang <xiaolou4617@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-05-16 11:54:07 -04:00
Marcel Holtmann
71653eb64b Bluetooth: Add selftest for ECDH key generation
Since the ECDH key generation takes a different path, it needs to be
tested as well. For this generate the public debug key from the private
debug key and compare both.

This also moves the seeding of the private key into the SMP calling code
to allow for easier re-use of the ECDH key generation helper.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2017-04-30 16:52:43 +03:00
Marcel Holtmann
f958315358 Bluetooth: zero kpp input for key generation
When generating new ECDH keys with kpp, the shared secret input needs to
be set to NULL. Fix this by including kpp_request_set_input call.

Fixes: 58771c1c ("Bluetooth: convert smp and selftest to crypto kpp
API")
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
2017-04-30 16:52:39 +03:00
Szymon Janc
ab89f0bdd6 Bluetooth: Fix user channel for 32bit userspace on 64bit kernel
Running 32bit userspace on 64bit kernel results in MSG_CMSG_COMPAT being
defined as 0x80000000. This results in sendmsg failure if used from 32bit
userspace running on 64bit kernel. Fix this by accounting for MSG_CMSG_COMPAT
in flags check in hci_sock_sendmsg.

Signed-off-by: Szymon Janc <szymon.janc@codecoup.pl>
Signed-off-by: Marko Kiiskila <marko@runtime.io>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: stable@vger.kernel.org
2017-04-30 12:22:14 +02:00
Salvatore Benedetto
763d9a302a Bluetooth: allocate data for kpp on heap
Bluetooth would crash when computing ECDH keys with kpp
if VMAP_STACK is enabled. Fix by allocating data passed
to kpp on heap.

Fixes: 58771c1c ("Bluetooth: convert smp and selftest to crypto kpp
API")
Signed-off-by: Salvatore Benedetto <salvatore.benedetto@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-30 12:22:05 +02:00
Salvatore Benedetto
58771c1cb0 Bluetooth: convert smp and selftest to crypto kpp API
* Convert both smp and selftest to crypto kpp API
* Remove module ecc as no more required
* Add ecdh_helper functions for wrapping kpp async calls

This patch has been tested *only* with selftest, which is called on
module loading.

Signed-off-by: Salvatore Benedetto <salvatore.benedetto@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-25 04:53:42 +02:00
Patrik Flykt
258695222b bluetooth: Do not set IFF_POINTOPOINT
The IPv6 stack needs to send and receive Neighbor Discovery
messages. Remove the IFF_POINTOPOINT flag.

Signed-off-by: Patrik Flykt <patrik.flykt@linux.intel.com>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Reviewed-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:41 +02:00
Luiz Augusto von Dentz
814f1b243d Bluetooth: 6lowpan: Set tx_queue_len to DEFAULT_TX_QUEUE_LEN
Make netdev queue packets if we run out of credits.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:41 +02:00
Luiz Augusto von Dentz
8a505b7f39 Bluetooth: L2CAP: Add l2cap_le_flowctl_send
Consolidate code sending data to LE CoC channels and adds proper
accounting of packets sent, the remaining credits and how many packets
are queued.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:41 +02:00
Luiz Augusto von Dentz
f183e52b8e Bluetooth: 6lowpan: Use netif APIs to flow control
Rely on netif_wake_queue and netif_stop_queue to flow control when
transmit resources are unavailable.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:40 +02:00
Luiz Augusto von Dentz
e1008f95e1 Bluetooth: 6lowpan: Don't drop packets when run out of credits
Since l2cap_chan_send will now queue the packets there is no point in
checking the credits anymore.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:40 +02:00
Luiz Augusto von Dentz
03732141bf Bluetooth: L2CAP: Don't return -EAGAIN if out of credits
Just keep queueing them into TX queue since the caller might just have
to do the same and there is no impact in adding another packet to the
TX queue even if there aren't any credits to transmit them.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:40 +02:00
Luiz Augusto von Dentz
da75fdc6bd Bluetooth: 6lowpan: Print errors during recv_pkt
This makes should make it more clear why a packet is being dropped.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:40 +02:00
Luiz Augusto von Dentz
27ce68a37b Bluetooth: 6lowpan: Remove unnecessary peer lookup
During chan_recv_cb there is already a peer lookup which can be passed
to recv_pkt directly instead of the channel.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:40 +02:00
Michael Scott
6dea44f5ac Bluetooth: 6lowpan: fix use after free in chan_suspend/resume
A status field in the skb_cb struct was storing a channel status
based on channel suspend/resume events.  This stored status was
then used to return EAGAIN if there were packet sending issues
in snd_pkt().

The issue is that the skb has been freed by the time the callback
to 6lowpan's suspend/resume was called.  So, this generates a
"use after free" issue that was noticed while running kernel tests
with KASAN debug enabled.

Let's eliminate the status field entirely as we can use the channel
tx_credits to indicate whether we should return EAGAIN when handling
packets.

Signed-off-by: Michael Scott <michael.scott@linaro.org>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:39 +02:00
Michael Scott
d2891c4d07 Bluetooth: 6lowpan: fix delay work init in add_peer_chan()
When adding 6lowpan devices very rapidly we sometimes see a crash:
[23122.306615] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.9.0-43-arm64  Debian 4.9.9.linaro.43-1
[23122.315400] Hardware name: HiKey Development Board (DT)
[23122.320623] task: ffff800075443080 task.stack: ffff800075484000
[23122.326551] PC is at expire_timers+0x70/0x150
[23122.330907] LR is at run_timer_softirq+0xa0/0x1a0
[23122.335616] pc : [<ffff000008142dd8>] lr : [<ffff000008142f58>] pstate: 600001c5

This was due to add_peer_chan() unconditionally initializing the
lowpan_btle_dev->notify_peers delayed work structure, even if the
lowpan_btle_dev passed into add_peer_chan() had previously been
initialized.

Normally, this would go unnoticed as the delayed work timer is set for
100 msec, however when calling add_peer_chan() faster than 100 msec it
clears out a previously queued delay work causing the crash above.

To fix this, let add_peer_chan() know when a new lowpan_btle_dev is passed
in so that it only performs the delay work initialization when needed.

Signed-off-by: Michael Scott <michael.scott@linaro.org>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:39 +02:00
Colin Ian King
fa0eaf840a 6lowpan: fix assignment of peer_addr
The data from peer->chan->dst is not being copied to peer_addr, the
current code just updates the pointer and not the contents of what
it points to.  Fix this with the intended assignment.

Detected by CoverityScan, CID#1422111 ("Parse warning
(PW.PARAM_SET_BUT_NOT_USED)")

Fixes: fb6f2f606ce8 ("6lowpan: Fix IID format for Bluetooth")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:39 +02:00
Jonas Holmberg
b48c3b59a3 Bluetooth: Change initial min and max interval
Use the initial connection interval recommended in Bluetooth
Specification v4.2 (30ms - 50ms).

Signed-off-by: Jonas Holmberg <jonashg@axis.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:38 +02:00
Colin Ian King
cd50361c21 Bluetooth: fix assignments on error variable err
Variable err is being initialized to zero and then later being
set to the error return from the call to hci_req_run_skb; hence
we can remove the redundant initialization to zero.

Also on two occassions err is not being set from the error return
from the call to hci_req_run_skb, so add these missing assignments.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:38 +02:00
Dean Jenkins
27bfbc21a0 Bluetooth: Avoid bt_accept_unlink() double unlinking
There is a race condition between a thread calling bt_accept_dequeue()
and a different thread calling bt_accept_unlink(). Protection against
concurrency is implemented using sk locking. However, sk locking causes
serialisation of the bt_accept_dequeue() and bt_accept_unlink() threads.
This serialisation can cause bt_accept_dequeue() to obtain the sk from the
parent list but becomes blocked waiting for the sk lock held by the
bt_accept_unlink() thread. bt_accept_unlink() unlinks sk and this thread
releases the sk lock unblocking bt_accept_dequeue() which potentially runs
bt_accept_unlink() again on the same sk causing a crash. The attempt to
double unlink the same sk from the parent list can cause a NULL pointer
dereference crash due to bt_sk(sk)->parent becoming NULL on the first
unlink, followed by the second unlink trying to execute
bt_sk(sk)->parent->sk_ack_backlog-- in bt_accept_unlink() which crashes.

When sk is in the parent list, bt_sk(sk)->parent will be not be NULL.
When sk is removed from the parent list, bt_sk(sk)->parent is set to
NULL. Therefore, add a defensive check for bt_sk(sk)->parent not being
NULL to ensure that sk is still in the parent list after the sk lock has
been taken in bt_accept_dequeue(). If bt_sk(sk)->parent is detected as
being NULL then restart the loop so that the loop variables are refreshed
to use the latest values. This is necessary as list_for_each_entry_safe()
is not thread safe so causing a risk of an infinite loop occurring as sk
could point to itself.

In addition, in bt_accept_dequeue() increase the sk reference count to
protect against early freeing of sk. Early freeing can be possible if the
bt_accept_unlink() thread calls l2cap_sock_kill() or rfcomm_sock_kill()
functions before bt_accept_dequeue() gets the sk lock.

For test purposes, the probability of failure can be increased by putting
a msleep of 1 second in bt_accept_dequeue() between getting the sk and
waiting for the sk lock. This exposes the fact that the loop
list_for_each_entry_safe(p, n, &bt_sk(parent)->accept_q) is not safe from
threads that unlink sk from the list in parallel with the loop which can
cause sk to become stale within the loop.

Signed-off-by: Dean Jenkins <Dean_Jenkins@mentor.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:37 +02:00
Dean Jenkins
e163376220 Bluetooth: Handle bt_accept_enqueue() socket atomically
There is a small risk that bt_accept_unlink() runs concurrently with
bt_accept_enqueue() on the same socket. This scenario could potentially
lead to a NULL pointer dereference of the socket's parent member because
the socket can be on the list but the socket's parent member is not yet
updated by bt_accept_enqueue().

Therefore, add socket locking inside bt_accept_enqueue() so that the
socket is added to the list AND the parent's socket address is set in the
socket's parent member. The socket locking ensures that the socket is on
the list with a valid non-NULL parent member.

Signed-off-by: Dean Jenkins <Dean_Jenkins@mentor.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:37 +02:00
Luiz Augusto von Dentz
9dae2e0303 6lowpan: Fix IID format for Bluetooth
According to RFC 7668 U/L bit shall not be used:

https://wiki.tools.ietf.org/html/rfc7668#section-3.2.2 [Page 10]:

   In the figure, letter 'b' represents a bit from the
   Bluetooth device address, copied as is without any changes on any
   bit.  This means that no bit in the IID indicates whether the
   underlying Bluetooth device address is public or random.

   |0              1|1              3|3              4|4              6|
   |0              5|6              1|2              7|8              3|
   +----------------+----------------+----------------+----------------+
   |bbbbbbbbbbbbbbbb|bbbbbbbb11111111|11111110bbbbbbbb|bbbbbbbbbbbbbbbb|
   +----------------+----------------+----------------+----------------+

Because of this the code cannot figure out the address type from the IP
address anymore thus it makes no sense to use peer_lookup_ba as it needs
the peer address type.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:36 +02:00
Luiz Augusto von Dentz
fa09ae661f 6lowpan: Use netdev addr_len to determine lladdr len
This allow technologies such as Bluetooth to use its native lladdr which
is eui48 instead of eui64 which was expected by functions like
lowpan_header_decompress and lowpan_header_compress.

Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:36 +02:00
Patrik Flykt
c259d1413b bluetooth: Set 6 byte device addresses
Set BTLE MAC addresses that are 6 bytes long and not 8 bytes
that are used in other places with 6lowpan.

Signed-off-by: Patrik Flykt <patrik.flykt@linux.intel.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Reviewed-by: Stefan Schmidt <stefan@osg.samsung.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:36 +02:00
Elena Reshetova
dab6b5daee Bluetooth: convert rfcomm_dlc.refcnt from atomic_t to refcount_t
refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-04-12 22:02:36 +02:00
David Howells
cdfbabfb2f net: Work around lockdep limitation in sockets that use sockets
Lockdep issues a circular dependency warning when AFS issues an operation
through AF_RXRPC from a context in which the VFS/VM holds the mmap_sem.

The theory lockdep comes up with is as follows:

 (1) If the pagefault handler decides it needs to read pages from AFS, it
     calls AFS with mmap_sem held and AFS begins an AF_RXRPC call, but
     creating a call requires the socket lock:

	mmap_sem must be taken before sk_lock-AF_RXRPC

 (2) afs_open_socket() opens an AF_RXRPC socket and binds it.  rxrpc_bind()
     binds the underlying UDP socket whilst holding its socket lock.
     inet_bind() takes its own socket lock:

	sk_lock-AF_RXRPC must be taken before sk_lock-AF_INET

 (3) Reading from a TCP socket into a userspace buffer might cause a fault
     and thus cause the kernel to take the mmap_sem, but the TCP socket is
     locked whilst doing this:

	sk_lock-AF_INET must be taken before mmap_sem

However, lockdep's theory is wrong in this instance because it deals only
with lock classes and not individual locks.  The AF_INET lock in (2) isn't
really equivalent to the AF_INET lock in (3) as the former deals with a
socket entirely internal to the kernel that never sees userspace.  This is
a limitation in the design of lockdep.

Fix the general case by:

 (1) Double up all the locking keys used in sockets so that one set are
     used if the socket is created by userspace and the other set is used
     if the socket is created by the kernel.

 (2) Store the kern parameter passed to sk_alloc() in a variable in the
     sock struct (sk_kern_sock).  This informs sock_lock_init(),
     sock_init_data() and sk_clone_lock() as to the lock keys to be used.

     Note that the child created by sk_clone_lock() inherits the parent's
     kern setting.

 (3) Add a 'kern' parameter to ->accept() that is analogous to the one
     passed in to ->create() that distinguishes whether kernel_accept() or
     sys_accept4() was the caller and can be passed to sk_alloc().

     Note that a lot of accept functions merely dequeue an already
     allocated socket.  I haven't touched these as the new socket already
     exists before we get the parameter.

     Note also that there are a couple of places where I've made the accepted
     socket unconditionally kernel-based:

	irda_accept()
	rds_rcp_accept_one()
	tcp_accept_from_sock()

     because they follow a sock_create_kern() and accept off of that.

Whilst creating this, I noticed that lustre and ocfs don't create sockets
through sock_create_kern() and thus they aren't marked as for-kernel,
though they appear to be internal.  I wonder if these should do that so
that they use the new set of lock keys.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-09 18:23:27 -08:00
Ingo Molnar
174cd4b1e5 sched/headers: Prepare to move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>
Fix up affected files that include this signal functionality via sched.h.

Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-03-02 08:42:32 +01:00
Masahiro Yamada
9332ef9dbd scripts/spelling.txt: add "an user" pattern and fix typo instances
Fix typos and add the following to the scripts/spelling.txt:

  an user||a user
  an userspace||a userspace

I also added "userspace" to the list since it is a common word in Linux.
I found some instances for "an userfaultfd", but I did not add it to the
list.  I felt it is endless to find words that start with "user" such as
"userland" etc., so must draw a line somewhere.

Link: http://lkml.kernel.org/r/1481573103-11329-4-git-send-email-yamada.masahiro@socionext.com
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-02-27 18:43:46 -08:00
Linus Torvalds
3051bf36c2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:
 "Highlights:

   1) Support TX_RING in AF_PACKET TPACKET_V3 mode, from Sowmini
      Varadhan.

   2) Simplify classifier state on sk_buff in order to shrink it a bit.
      From Willem de Bruijn.

   3) Introduce SIPHASH and it's usage for secure sequence numbers and
      syncookies. From Jason A. Donenfeld.

   4) Reduce CPU usage for ICMP replies we are going to limit or
      suppress, from Jesper Dangaard Brouer.

   5) Introduce Shared Memory Communications socket layer, from Ursula
      Braun.

   6) Add RACK loss detection and allow it to actually trigger fast
      recovery instead of just assisting after other algorithms have
      triggered it. From Yuchung Cheng.

   7) Add xmit_more and BQL support to mvneta driver, from Simon Guinot.

   8) skb_cow_data avoidance in esp4 and esp6, from Steffen Klassert.

   9) Export MPLS packet stats via netlink, from Robert Shearman.

  10) Significantly improve inet port bind conflict handling, especially
      when an application is restarted and changes it's setting of
      reuseport. From Josef Bacik.

  11) Implement TX batching in vhost_net, from Jason Wang.

  12) Extend the dummy device so that VF (virtual function) features,
      such as configuration, can be more easily tested. From Phil
      Sutter.

  13) Avoid two atomic ops per page on x86 in bnx2x driver, from Eric
      Dumazet.

  14) Add new bpf MAP, implementing a longest prefix match trie. From
      Daniel Mack.

  15) Packet sample offloading support in mlxsw driver, from Yotam Gigi.

  16) Add new aquantia driver, from David VomLehn.

  17) Add bpf tracepoints, from Daniel Borkmann.

  18) Add support for port mirroring to b53 and bcm_sf2 drivers, from
      Florian Fainelli.

  19) Remove custom busy polling in many drivers, it is done in the core
      networking since 4.5 times. From Eric Dumazet.

  20) Support XDP adjust_head in virtio_net, from John Fastabend.

  21) Fix several major holes in neighbour entry confirmation, from
      Julian Anastasov.

  22) Add XDP support to bnxt_en driver, from Michael Chan.

  23) VXLAN offloads for enic driver, from Govindarajulu Varadarajan.

  24) Add IPVTAP driver (IP-VLAN based tap driver) from Sainath Grandhi.

  25) Support GRO in IPSEC protocols, from Steffen Klassert"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1764 commits)
  Revert "ath10k: Search SMBIOS for OEM board file extension"
  net: socket: fix recvmmsg not returning error from sock_error
  bnxt_en: use eth_hw_addr_random()
  bpf: fix unlocking of jited image when module ronx not set
  arch: add ARCH_HAS_SET_MEMORY config
  net: napi_watchdog() can use napi_schedule_irqoff()
  tcp: Revert "tcp: tcp_probe: use spin_lock_bh()"
  net/hsr: use eth_hw_addr_random()
  net: mvpp2: enable building on 64-bit platforms
  net: mvpp2: switch to build_skb() in the RX path
  net: mvpp2: simplify MVPP2_PRS_RI_* definitions
  net: mvpp2: fix indentation of MVPP2_EXT_GLOBAL_CTRL_DEFAULT
  net: mvpp2: remove unused register definitions
  net: mvpp2: simplify mvpp2_bm_bufs_add()
  net: mvpp2: drop useless fields in mvpp2_bm_pool and related code
  net: mvpp2: remove unused 'tx_skb' field of 'struct mvpp2_tx_queue'
  net: mvpp2: release reference to txq_cpu[] entry after unmapping
  net: mvpp2: handle too large value in mvpp2_rx_time_coal_set()
  net: mvpp2: handle too large value handling in mvpp2_rx_pkts_coal_set()
  net: mvpp2: remove useless arguments in mvpp2_rx_{pkts, time}_coal_set
  ...
2017-02-22 10:15:09 -08:00
Colin Ian King
27d1c469a5 Bluetooth: fix spelling mistake: "advetising" -> "advertising"
trivial fix to spelling mistake in BT_ERR_RATELIMITED error message

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-02-16 17:39:35 +01:00
Ezequiel Garcia
9dcbc313cd Bluetooth: Fix NULL pointer dereference in bt_sock_recvmsg
As per the comment in include/linux/net.h, the recvfrom handlers
should expect msg_name to be NULL. However, bt_sock_recvmsg()
is currently not checking it, which could lead to a NULL pointer
dereference.

The following NULL pointer dereference was produced while testing
L2CAP datagram reception. Note that the kernel is tainted due to
the r8723bs module being inserted. However, it seems the fix still
applies.

$ l2test -r -G
l2test[326]: Receiving ...
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = ee008000
[00000000] *pgd=7f896835
Internal error: Oops: 817 [] PREEMPT SMP ARM
Modules linked in: r8723bs(O)
CPU: 0 PID: 326 Comm: l2test Tainted: G           O 4.8.0 
Hardware name: Allwinner sun7i (A20) Family
task: ef1c6880 task.stack: eea70000
PC is at __memzero+0x58/0x80
LR is at l2cap_skb_msg_name+0x1c/0x4c
pc : [<c02c47d8>]    lr : [<c0506278>]    psr: 00070013
sp : eea71e60  ip : 00000000  fp : 00034e1c
r10: 00000000  r9 : 00000000  r8 : eea71ed4
r7 : 000002a0  r6 : eea71ed8  r5 : 00000000  r4 : ee4a5d80
r3 : 00000000  r2 : 00000000  r1 : 0000000e  r0 : 00000000
Flags: nzcv  IRQs on  FIQs on  Mode SVC_32  ISA ARM Segment none
Control: 10c5387d  Table: 7600806a  DAC: 00000051
Process l2test (pid: 326, stack limit = 0xeea70210)
Stack: (0xeea71e60 to 0xeea72000)
1e60: ee4a5d80 eeac2800 000002a0 c04d7114 173eefa0 00000000 c06ca68e 00000000
1e80: 00000001 eeac2800 eef23500 00000000 000002a0 eea71ed4 eea70000 c0504d50
1ea0: 00000000 00000000 eef23500 00000000 00000000 c044e8a0 eea71edc eea9f904
1ec0: bef89aa0 fffffff7 00000000 00035008 000002a0 00000000 00000000 00000000
1ee0: 00000000 00000000 eea71ed4 00000000 00000000 00000000 00004000 00000000
1f00: 0000011b c01078c4 eea70000 c044e5e4 00000000 00000000 642f0001 6c2f7665
1f20: 0000676f 00000000 00000000 00000000 00000000 00000000 00000000 00000000
1f40: 00000000 00000000 00000000 00000000 00000000 ffffffff 00000001 bef89ad8
1f60: 000000a8 c01078c4 eea70000 00000000 00034e1c c01e6c74 00000000 00000000
1f80: 00034e1c 000341f8 00000000 00000123 c01078c4 c044e90c 00000000 00000000
1fa0: 000002a0 c0107700 00034e1c 000341f8 00000003 00035008 000002a0 00000000
1fc0: 00034e1c 000341f8 00000000 00000123 00000000 00000000 00011ffc 00034e1c
1fe0: 00000000 bef89aa4 0001211c b6eebb60 60070010 00000003 00000000 00000000
[<c02c47d8>] (__memzero) from [<c0506278>] (l2cap_skb_msg_name+0x1c/0x4c)
[<c0506278>] (l2cap_skb_msg_name) from [<c04d7114>] (bt_sock_recvmsg+0x128/0x160)
[<c04d7114>] (bt_sock_recvmsg) from [<c0504d50>] (l2cap_sock_recvmsg+0x98/0x134)
[<c0504d50>] (l2cap_sock_recvmsg) from [<c044e8a0>] (SyS_recvfrom+0x94/0xec)
[<c044e8a0>] (SyS_recvfrom) from [<c044e90c>] (SyS_recv+0x14/0x1c)
[<c044e90c>] (SyS_recv) from [<c0107700>] (ret_fast_syscall+0x0/0x3c)
Code: e3110010 18a0500c e49de004 e3110008 (18a0000c)
---[ end trace 224e35e79fe06b42 ]---

Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2017-02-16 17:23:57 +01:00
Peter Zijlstra
2c935bc572 locking/atomic, kref: Add kref_read()
Since we need to change the implementation, stop exposing internals.

Provide kref_read() to read the current reference count; typically
used for debug messages.

Kills two anti-patterns:

	atomic_read(&kref->refcount)
	kref->refcount.counter

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-14 11:37:18 +01:00
Linus Torvalds
9a19a6db37 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs updates from Al Viro:

 - more ->d_init() stuff (work.dcache)

 - pathname resolution cleanups (work.namei)

 - a few missing iov_iter primitives - copy_from_iter_full() and
   friends. Either copy the full requested amount, advance the iterator
   and return true, or fail, return false and do _not_ advance the
   iterator. Quite a few open-coded callers converted (and became more
   readable and harder to fuck up that way) (work.iov_iter)

 - several assorted patches, the big one being logfs removal

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  logfs: remove from tree
  vfs: fix put_compat_statfs64() does not handle errors
  namei: fold should_follow_link() with the step into not-followed link
  namei: pass both WALK_GET and WALK_MORE to should_follow_link()
  namei: invert WALK_PUT logics
  namei: shift interpretation of LOOKUP_FOLLOW inside should_follow_link()
  namei: saner calling conventions for mountpoint_last()
  namei.c: get rid of user_path_parent()
  switch getfrag callbacks to ..._full() primitives
  make skb_add_data,{_nocache}() and skb_copy_to_page_nocache() advance only on success
  [iov_iter] new primitives - copy_from_iter_full() and friends
  don't open-code file_inode()
  ceph: switch to use of ->d_init()
  ceph: unify dentry_operations instances
  lustre: switch to use of ->d_init()
2016-12-16 10:24:44 -08:00
Michael S. Tsirkin
6bdf1e0efb Makefile: drop -D__CHECK_ENDIAN__ from cflags
That's the default now, no need for makefiles to set it.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Kalle Valo <kvalo@codeaurora.org>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
2016-12-16 00:13:43 +02:00
Johan Hedberg
a62da6f14d Bluetooth: SMP: Add support for H7 crypto function and CT2 auth flag
Bluetooth 5.0 introduces a new H7 key generation function that's used
when both sides of the pairing set the CT2 authentication flag to 1.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-12-08 07:50:24 +01:00
Al Viro
cbbd26b8b1 [iov_iter] new primitives - copy_from_iter_full() and friends
copy_from_iter_full(), copy_from_iter_full_nocache() and
csum_and_copy_from_iter_full() - counterparts of copy_from_iter()
et.al., advancing iterator only in case of successful full copy
and returning whether it had been successful or not.

Convert some obvious users.  *NOTE* - do not blindly assume that
something is a good candidate for those unless you are sure that
not advancing iov_iter in failure case is the right thing in
this case.  Anything that does short read/short write kind of
stuff (or is in a loop, etc.) is unlikely to be a good one.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2016-12-05 14:33:36 -05:00
David S. Miller
0b42f25d2f Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
udplite conflict is resolved by taking what 'net-next' did
which removed the backlog receive method assignment, since
it is no longer necessary.

Two entries were added to the non-priv ethtool operations
switch statement, one in 'net' and one in 'net-next, so
simple overlapping changes.

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-26 23:42:21 -05:00
Johan Hedberg
39385cb5f3 Bluetooth: Fix using the correct source address type
The hci_get_route() API is used to look up local HCI devices, however
so far it has been incapable of dealing with anything else than the
public address of HCI devices. This completely breaks with LE-only HCI
devices that do not come with a public address, but use a static
random address instead.

This patch exteds the hci_get_route() API with a src_type parameter
that's used for comparing with the right address of each HCI device.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-11-22 22:50:46 +01:00
David S. Miller
27058af401 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Mostly simple overlapping changes.

For example, David Ahern's adjacency list revamp in 'net-next'
conflicted with an adjacency list traversal bug fix in 'net'.

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-30 12:42:58 -04:00
Jarod Wilson
8b1efc0f83 net: remove MTU limits on a few ether_setup callers
These few drivers call ether_setup(), but have no ndo_change_mtu, and thus
were overlooked for changes to MTU range checking behavior. They
previously had no range checks, so for feature-parity, set their min_mtu
to 0 and max_mtu to ETH_MAX_MTU (65535), instead of the 68 and 1500
inherited from the ether_setup() changes. Fine-tuning can come after we get
back to full feature-parity here.

CC: netdev@vger.kernel.org
Reported-by: Asbjoern Sloth Toennesen <asbjorn@asbjorn.st>
CC: Asbjoern Sloth Toennesen <asbjorn@asbjorn.st>
CC: R Parameswaran <parameswaran.r7@gmail.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-21 13:57:50 -04:00
Michał Narajowski
f61851f64b Bluetooth: Fix append max 11 bytes of name to scan rsp data
Append maximum of 10 + 1 bytes of name to scan response data.
Complete name is appended only if exists and is <= 10 characters.
Else append short name if exists or shorten complete name if not.
This makes sure name is consistent across multiple advertising
instances.

Signed-off-by: Michał Narajowski <michal.narajowski@codecoup.pl>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-10-19 18:42:37 +02:00
Jarod Wilson
a52ad514fd net: deprecate eth_change_mtu, remove usage
With centralized MTU checking, there's nothing productive done by
eth_change_mtu that isn't already done in dev_set_mtu, so mark it as
deprecated and remove all usage of it in the kernel. All callers have been
audited for calls to alloc_etherdev* or ether_setup directly, which means
they all have a valid dev->min_mtu and dev->max_mtu. Now eth_change_mtu
prints out a netdev_warn about being deprecated, for the benefit of
out-of-tree drivers that might be utilizing it.

Of note, dvb_net.c actually had dev->mtu = 4096, while using
eth_change_mtu, meaning that if you ever tried changing it's mtu, you
couldn't set it above 1500 anymore. It's now getting dev->max_mtu also set
to 4096 to remedy that.

v2: fix up lantiq_etop, missed breakage due to drive not compiling on x86

CC: netdev@vger.kernel.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-13 09:36:57 -04:00
Michał Narajowski
1b42206665 Bluetooth: Refactor append name and appearance
Use eir_append_data to remove code duplication.

Signed-off-by: Michał Narajowski <michal.narajowski@codecoup.pl>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-10-06 11:52:29 +02:00
Michał Narajowski
7ddb30c747 Bluetooth: Add appearance to default scan rsp data
Add appearance value to beginning of scan rsp data for
default advertising instance if the value is not 0.

Signed-off-by: Michał Narajowski <michal.narajowski@codecoup.pl>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
2016-10-06 11:52:29 +02:00