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(parent: 432264e) | patch
sch_netem: fix a divide by zero in tabledist()
authorEric Dumazet <edumazet@google.com>
Wed, 18 Sep 2019 15:05:39 +0000 (08:05 -0700)
committerJakub Kicinski <jakub.kicinski@netronome.com>
Sat, 21 Sep 2019 02:12:22 +0000 (19:12 -0700)
commitb41d936b5ecfdb3a4abc525ce6402a6c49cffddc
tree240877850aa857e1f58e6a4be373c2ecee883f20tree | snapshot
parent432264e9dfd10537e3cb66a11739f76754fc89e6commit | diff
sch_netem: fix a divide by zero in tabledist()

syzbot managed to crash the kernel in tabledist() loading
an empty distribution table.

t = dist->table[rnd % dist->size];

Simply return an error when such load is attempted.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
net/sched/sch_netem.c diff | blob | history
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