From f4180439109aa720774baafdd798b3234ab1a0d2 Mon Sep 17 00:00:00 2001 From: Eli Cooper Date: Thu, 1 Dec 2016 10:05:10 +0800 Subject: 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 Signed-off-by: David S. Miller --- net/ipv4/ip_output.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'net/ipv4/ip_output.c') diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index 105908d841a3..877bdb02e887 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -107,6 +107,8 @@ int __ip_local_out(struct net *net, struct sock *sk, struct sk_buff *skb) if (unlikely(!skb)) return 0; + skb->protocol = htons(ETH_P_IP); + return nf_hook(NFPROTO_IPV4, NF_INET_LOCAL_OUT, net, sk, skb, NULL, skb_dst(skb)->dev, dst_output); -- cgit v1.2.3-59-g8ed1b