net: sched: fix warning in tcindex_alloc_perfect_hash

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[ Upstream commit 3f2db25009 ]

Syzbot reported warning in tcindex_alloc_perfect_hash. The problem
was in too big cp->hash, which triggers warning in kmalloc. Since
cp->hash comes from userspace, there is no need to warn if value
is not correct

Fixes: b9a24bb76b ("net_sched: properly handle failure case of tcf_exts_init()")
Reported-and-tested-by: syzbot+1071ad60cd7df39fdadb@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Acked-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Pavel Skripkin 2021-06-25 23:23:48 +03:00 • committed by Greg Kroah-Hartman

parent 4476568069

commit 1148952dc6

1 changed files with 1 additions and 1 deletions

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net/sched/cls_tcindex.c

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