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(parent: a7f3800) | patch
ipv6: fix possible use-after-free in ip6_xmit()
authorEric Dumazet <edumazet@google.com>
Fri, 14 Sep 2018 19:02:31 +0000 (12:02 -0700)
committerDavid S. Miller <davem@davemloft.net>
Mon, 17 Sep 2018 14:56:02 +0000 (07:56 -0700)
commitbbd6528d28c1b8e80832b3b018ec402b6f5c3215
tree4c7e9f26af82fd34dcbc6520091f046982388a10tree | snapshot
parenta7f38002fb69b44f8fc622ecb838665d0b8666afcommit | diff
ipv6: fix possible use-after-free in ip6_xmit()

In the unlikely case ip6_xmit() has to call skb_realloc_headroom(),
we need to call skb_set_owner_w() before consuming original skb,
otherwise we risk a use-after-free.

Bring IPv6 in line with what we do in IPv4 to fix this.

Fixes: 1da177e4c3f41 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv6/ip6_output.c diff | blob | history
wrapfs-4.14.y