ipv6: sr: enforce IPv6 packets for seg6local lwt

This patch ensures that the seg6local lightweight tunnel is used solely with IPv6 routes and processes only IPv6 packets. Signed-off-by: David Lebrun <[email protected]> Signed-off-by: David S. Miller <[email protected]>
fracktal · Aug 26, 2017 · 6285217 · 6285217
1 parent 38ee7f2
commit 6285217
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/net/ipv6/seg6_local.c b/net/ipv6/seg6_local.c
@@ -357,6 +357,11 @@ static int seg6_local_input(struct sk_buff *skb)
 	struct seg6_action_desc *desc;
 	struct seg6_local_lwt *slwt;
 
+	if (skb->protocol != htons(ETH_P_IPV6)) {
+		kfree_skb(skb);
+		return -EINVAL;
+	}
+
 	slwt = seg6_local_lwtunnel(orig_dst->lwtstate);
 	desc = slwt->desc;
 
@@ -623,6 +628,9 @@ static int seg6_local_build_state(struct nlattr *nla, unsigned int family,
 	struct seg6_local_lwt *slwt;
 	int err;
 
+	if (family != AF_INET6)
+		return -EINVAL;
+
 	err = nla_parse_nested(tb, SEG6_LOCAL_MAX, nla, seg6_local_policy,
 			       extack);