vti4: Fix a ipip packet processing bug in 'IPCOMP' virtual tunnel
[ Upstream commit dd9ee3444014e8f28c0eefc9fffc9ac9c5248c12 ] Recently we run a network test over ipcomp virtual tunnel.We find that if a ipv4 packet needs fragment, then the peer can't receive it. We deep into the code and find that when packet need fragment the smaller fragment will be encapsulated by ipip not ipcomp. So when the ipip packet goes into xfrm, it's skb->dev is not properly set. The ipv4 reassembly code always set skb'dev to the last fragment's dev. After ipv4 defrag processing, when the kernel rp_filter parameter is set, the skb will be drop by -EXDEV error. This patch adds compatible support for the ipip process in ipcomp virtual tunnel. Signed-off-by: NSu Yanjun <suyj.fnst@cn.fujitsu.com> Signed-off-by: NSteffen Klassert <steffen.klassert@secunet.com> Signed-off-by: NSasha Levin <sashal@kernel.org>
Showing
想要评论请 注册 或 登录