ipv4: Set skb->protocol properly for local output
authorEli Cooper <elicooper@gmx.com>
Thu, 1 Dec 2016 02:05:10 +0000 (10:05 +0800)
committerDavid S. Miller <davem@davemloft.net>
Fri, 2 Dec 2016 17:34:22 +0000 (12:34 -0500)
commitf4180439109aa720774baafdd798b3234ab1a0d2
tree03c8f7784d5e833ef1a917299da4d2a80573e781
parent84ac7260236a49c79eede91617700174c2c19b0c
ipv4: Set skb->protocol properly for local output

When xfrm is applied to TSO/GSO packets, it follows this path:

    xfrm_output() -> xfrm_output_gso() -> skb_gso_segment()

where skb_gso_segment() relies on skb->protocol to function properly.

This patch sets skb->protocol to ETH_P_IP before dst_output() is called,
fixing a bug where GSO packets sent through a sit tunnel are dropped
when xfrm is involved.

Cc: stable@vger.kernel.org
Signed-off-by: Eli Cooper <elicooper@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/ip_output.c