ip_forward: Drop frames with attached skb->sk

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Initial discussion was:
[FYI] xfrm: Don't lookup sk_policy for timewait sockets

Forwarded frames should not have a socket attached. Especially
tw sockets will lead to panics later-on in the stack.

This was observed with TPROXY assigning a tw socket and broken
policy routing (misconfigured). As a result frame enters
forwarding path instead of input. We cannot solve this in
TPROXY as it cannot know that policy routing is broken.

v2:
Remove useless comment

Signed-off-by: Sebastian Poehn <sebastian.poehn@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Sebastian Pöhn 2015-04-20 09:19:20 +02:00 • committed by David S. Miller

parent 04b7fe6a4a

commit 2ab957492d

1 changed files with 3 additions and 0 deletions

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net/ipv4/ip_forward.c

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