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[net-next,3/5] ipv6: sr: enforce IPv6 packets for seg6local lwt

Message ID 20170823153203.11951-4-david.lebrun@uclouvain.be
State Changes Requested, archived
Delegated to: David Miller
Headers show

Commit Message

David Lebrun Aug. 23, 2017, 3:32 p.m. UTC 
This patch ensures that the seg6local lightweight tunnel is used solely
with IPv6 routes and processes only IPv6 packets.

Signed-off-by: David Lebrun <david.lebrun@uclouvain.be>
---
 net/ipv6/seg6_local.c | 8 ++++++++
 1 file changed, 8 insertions(+)
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Patch

diff --git a/net/ipv6/seg6_local.c b/net/ipv6/seg6_local.c
index 609b94e..c626325 100644
--- 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);