From 5197f3499c470ccc4b247db66ff883e597e3adda Mon Sep 17 00:00:00 2001 From: Alexander Duyck Date: Tue, 22 Mar 2016 16:18:07 -0700 Subject: net: Reset encap_level to avoid resetting features on inner IP headers This patch corrects an oversight in which we were allowing the encap_level value to pass from the outer headers to the inner headers. As a result we were incorrectly identifying UDP or GRE tunnels as also making use of ipip or sit when the second header actually represented a tunnel encapsulated in either a UDP or GRE tunnel which already had the features masked. Fixes: 76443456227097179c1482 ("net: Move GSO csum into SKB_GSO_CB") Reported-by: Tom Herbert Signed-off-by: Alexander Duyck Acked-by: Tom Herbert Signed-off-by: David S. Miller --- net/ipv4/gre_offload.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net/ipv4/gre_offload.c') diff --git a/net/ipv4/gre_offload.c b/net/ipv4/gre_offload.c index dd031617160a..c47539d04b88 100644 --- a/net/ipv4/gre_offload.c +++ b/net/ipv4/gre_offload.c @@ -49,6 +49,7 @@ static struct sk_buff *gre_gso_segment(struct sk_buff *skb, /* setup inner skb. */ skb->encapsulation = 0; + SKB_GSO_CB(skb)->encap_level = 0; __skb_pull(skb, tnl_hlen); skb_reset_mac_header(skb); skb_set_network_header(skb, skb_inner_network_offset(skb)); -- cgit v1.2.3-59-g8ed1b