3.16.40-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Eli Cooper <elicooper@xxxxxxx>
commit b4e479a96fc398ccf83bb1cffb4ffef8631beaf1 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_IPV6 before dst_output() is called,
fixing a bug where GSO packets sent through an ipip6 tunnel are dropped
when xfrm is involved.
Signed-off-by: Eli Cooper <elicooper@xxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
[bwh: Backported to 3.16: adjust context]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
net/ipv6/output_core.c | 2 ++
1 file changed, 2 insertions(+)
--- a/net/ipv6/output_core.c
+++ b/net/ipv6/output_core.c
@@ -114,6 +114,8 @@ int __ip6_local_out(struct sk_buff *skb)
ipv6_hdr(skb)->payload_len = htons(len);
IP6CB(skb)->nhoff = offsetof(struct ipv6hdr, nexthdr);
+ skb->protocol = htons(ETH_P_IPV6);
+
return nf_hook(NFPROTO_IPV6, NF_INET_LOCAL_OUT, skb, NULL,
skb_dst(skb)->dev, dst_output);
}