From: Isaku Yamahata Date: Mon, 24 Dec 2012 16:51:03 +0000 (+0000) Subject: ipv4/ip_gre: set transport header correctly to gre header X-Git-Tag: accepted/tizen/common/20141203.182822~3099^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=861aa6d56de8147249c8a04a4e87fb7c3600cca1;p=platform%2Fkernel%2Flinux-arm64.git ipv4/ip_gre: set transport header correctly to gre header ipgre_tunnel_xmit() incorrectly sets transport header to inner payload instead of GRE header. It seems copy-and-pasted from ipip.c. So set transport header to gre header. (In ipip case the transport header is the inner ip header, so that's correct.) Found by inspection. In practice the incorrect transport header doesn't matter because the skb usually is sent to another net_device or socket, so the transport header isn't referenced. Signed-off-by: Isaku Yamahata Signed-off-by: David S. Miller --- diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 58cb627..303012a 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -912,9 +912,9 @@ static netdev_tx_t ipgre_tunnel_xmit(struct sk_buff *skb, struct net_device *dev /* Warning : tiph value might point to freed memory */ } - skb_reset_transport_header(skb); skb_push(skb, gre_hlen); skb_reset_network_header(skb); + skb_set_transport_header(skb, sizeof(*iph)); memset(&(IPCB(skb)->opt), 0, sizeof(IPCB(skb)->opt)); IPCB(skb)->flags &= ~(IPSKB_XFRM_TUNNEL_SIZE | IPSKB_XFRM_TRANSFORMED | IPSKB_REROUTED);