From: Jiri Benc <jb...@redhat.com>
Date: Fri, 29 Apr 2016 23:31:32 +0200
> iptunnel_pull_header expects that IP header was already pulled; with this
> expectation, it pulls the tunnel header. This is not true in gre_err.
> Furthermore, ipv4_update_pmtu and ipv4_redirect expect that skb->data points
> to the IP header.
>
> We cannot pull the tunnel header in this path. It's just a matter of not
> calling iptunnel_pull_header - we don't need any of its effects.
>
> Fixes: bda7bb463436 ("gre: Allow multiple protocol listener for gre
> protocol.")
> Signed-off-by: Jiri Benc <jb...@redhat.com>
Applied and queued up for -stable, thanks Jiri.
