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linux/net/sctp
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Xin Long 5bf35ddfee sctp: change sk state only when it has assocs in sctp_shutdown 
Now when users shutdown a sock with SEND_SHUTDOWN in sctp, even if
this sock has no connection (assoc), sk state would be changed to
SCTP_SS_CLOSING, which is not as we expect.

Besides, after that if users try to listen on this sock, kernel
could even panic when it dereference sctp_sk(sk)->bind_hash in
sctp_inet_listen, as bind_hash is null when sock has no assoc.

This patch is to move sk state change after checking sk assocs
is not empty, and also merge these two if() conditions and reduce
indent level.

Fixes: d46e416c11 ("sctp: sctp should change socket state when shutdown is received")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Tested-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-14 16:22:33 -05:00
..
associola.c sctp: rename WORD_TRUNC/ROUND macros 2016-09-22 03:13:26 -04:00
auth.c sctp: use IS_ENABLED() instead of checking for built-in or module 2016-09-10 21:19:11 -07:00
bind_addr.c
chunk.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-02 22:20:41 -04:00
debug.c
endpointola.c sctp: add SCTP_PR_SUPPORTED on sctp sockopt 2016-07-11 13:25:38 -07:00
input.c sctp: hold transport instead of assoc when lookup assoc in rx path 2016-10-31 16:20:33 -04:00
inqueue.c sctp: rename WORD_TRUNC/ROUND macros 2016-09-22 03:13:26 -04:00
ipv6.c sctp: hold transport instead of assoc when lookup assoc in rx path 2016-10-31 16:20:33 -04:00
Kconfig sctp: add the sctp_diag.c file 2016-04-15 17:29:36 -04:00
Makefile sctp: Add GSO support 2016-06-03 19:37:21 -04:00
objcnt.c
offload.c sctp: fix GSO for IPv6 2016-07-16 22:02:09 -07:00
output.c sctp: fix the panic caused by route update 2016-10-26 17:32:19 -04:00
outqueue.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-02 22:20:41 -04:00
primitive.c
probe.c
proc.c net: Suppress the "Comparison to NULL could be written" warnings 2016-09-30 01:50:45 -04:00
protocol.c sctp: use inet_recvmsg to support sctp RFS well 2016-07-25 10:56:28 -07:00
sctp_diag.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-02 22:20:41 -04:00
sm_make_chunk.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-02 22:20:41 -04:00
sm_sideeffect.c sctp: make sctp_outq_flush/tail/uncork return void 2016-09-18 22:02:33 -04:00
sm_statefuns.c sctp: validate chunk len before actually using it 2016-10-29 12:00:10 -04:00
sm_statetable.c
socket.c sctp: change sk state only when it has assocs in sctp_shutdown 2016-11-14 16:22:33 -05:00
ssnmap.c
sysctl.c
transport.c sctp: rename WORD_TRUNC/ROUND macros 2016-09-22 03:13:26 -04:00
tsnmap.c
ulpevent.c sctp: rename WORD_TRUNC/ROUND macros 2016-09-22 03:13:26 -04:00
ulpqueue.c sctp: Remove some redundant code 2016-09-19 01:34:01 -04:00