From 861aa6d56de8147249c8a04a4e87fb7c3600cca1 Mon Sep 17 00:00:00 2001 From: Isaku Yamahata <yamahata@valinux.co.jp> Date: Mon, 24 Dec 2012 16:51:03 +0000 Subject: [PATCH] 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 <yamahata@valinux.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net> --- net/ipv4/ip_gre.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 58cb627560dd..303012adf9e6 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); -- GitLab