net/smc: take sock lock in smc_ioctl()

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SMC ioctl processing requires the sock lock to work properly in
all thinkable scenarios.
Problem has been found with RaceFuzzer and fixes:
   KASAN: null-ptr-deref Read in smc_ioctl

Reported-by: Byoungyoung Lee <lifeasageek@gmail.com>
Reported-by: syzbot+35b2c5aa76fd398b9fd4@syzkaller.appspotmail.com
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Ursula Braun 2018-07-16 13:56:52 +02:00 • committed by David S. Miller

parent bd598d2050

commit 1992d99882

1 changed files with 15 additions and 4 deletions

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net/smc/af_smc.c

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