tree 875de67e132fae67722ed9b478710b76f34eaddd
parent 3b3e0ea8bc0f46e8291295003f70225e5a66acbc
author Shmulik Ladkani <shmulik.ladkani@gmail.com> 1408019240 +0300
committer David S. Miller <davem@davemloft.net> 1408052334 -0700

sit: Fix ipip6_tunnel_lookup device matching criteria

As of 4fddbf5d78 ("sit: strictly restrict incoming traffic to tunnel link device"),
when looking up a tunnel, tunnel's underlying interface (t->parms.link)
is verified to match incoming traffic's ingress device.

However the comparison was incorrectly based on skb->dev->iflink.

Instead, dev->ifindex should be used, which correctly represents the
interface from which the IP stack hands the ipip6 packets.

This allows setting up sit tunnels bound to vlan interfaces (otherwise
incoming ipip6 traffic on the vlan interface was dropped due to
ipip6_tunnel_lookup match failure).

Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>