From: Jiri Benc
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 head
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
