tree c2466a9f21ebe502038d030ee6da1f79aed44a27
parent 25d8b7c105e13df4a0b14159a85c448158570909
author Eli Cooper <elicooper@gmx.com> 1480557910 +0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1481393246 +0100

ipv4: Set skb->protocol properly for local output

commit f4180439109aa720774baafdd798b3234ab1a0d2 upstream.

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.

Signed-off-by: Eli Cooper <elicooper@gmx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>