Re: [PATCH 1/1] ipv6 : ip6mr.c : Fix can't match the IPv6 multicast packets with input net device in netfilter FORWARD chain.

On Thu, 2012-08-02 at 16:20 -0700, David Miller wrote:

From: Jun Zhao <redacted>
Date: Thu,  2 Aug 2012 21:00:55 +0800

quoted

Current kernel change the skb's net device with output device before netfilter FORWARD chain,
that will lead to can't match the IPv6 multicast packets with input net device in netfilter
FORWARD chain.

the test case for reproduce this issue as follow:

IPv6 multicast udp stream from eth0(input device) to eth1(output device)

Your change means we now can't match on the VIF device in this situation.

I'm not applying this patch, it breaks as much as it fixes.

Hi, David:

Maybe I need to used conservative approach to fix it and don't breaks
much more, I will supply the version 2 patch for this issue.

Tks.