Re: [PATCH v2] vti4: Fix a ipip packet processing bug in 'IPCOMP' virtual tunnel

[Steffen Klassert]

On Sun, Jan 06, 2019 at 09:31:20PM -0500, Su Yanjun wrote:
> 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: Su Yanjun <suyj.fnst@xxxxxxxxxxxxxx>

Patch applied, thanks!