datapath: compat: Add NULL check for tun-dst.

tun-dst could be NULL in case of incorrect action list where set tunnel action is missing but packet is sent to tunnel vport. Signed-off-by: Pravin B Shelar <[email protected]> Acked-by: Joe Stringer <[email protected]>
xnox · Jan 21, 2016 · f6bbff4 · f6bbff4
1 parent 8d24e9c
commit f6bbff4
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/datapath/linux/compat/gso.h b/datapath/linux/compat/gso.h
@@ -170,7 +170,10 @@ static inline void ovs_skb_dst_set(struct sk_buff *skb, void *dst)
 
 static inline struct ip_tunnel_info *ovs_skb_tunnel_info(struct sk_buff *skb)
 {
-	return &OVS_GSO_CB(skb)->tun_dst->u.tun_info;
+	if (likely(OVS_GSO_CB(skb)->tun_dst))
+		return &OVS_GSO_CB(skb)->tun_dst->u.tun_info;
+	else
+		return NULL;
 }
 
 static inline void ovs_skb_dst_drop(struct sk_buff *skb)