[PATCH 4.4 33/43] ipv6: check skb->protocol before lookup for nexthop

4.4-stable review patch. If anyone has any objections, please let me know. -- From: WANG Cong [ Upstream commit 199ab00f3cdb6f154ea93fa76fd80192861a821d ] Andrey reported a out-of-bound access in ip6_tnl_xmit(), this is because we use an ipv4 dst in

[PATCH 4.4 33/43] ipv6: check skb->protocol before lookup for nexthop

4.4-stable review patch. If anyone has any objections, please let me know. -- From: WANG Cong [ Upstream commit 199ab00f3cdb6f154ea93fa76fd80192861a821d ] Andrey reported a out-of-bound access in ip6_tnl_xmit(), this is because we use an ipv4 dst in ip6_tnl_xmit() and cast