From 213d7f94775322ba44e0bbb55ec6946e9de88cea Mon Sep 17 00:00:00 2001 From: Richard Haines Date: Mon, 13 Nov 2017 20:54:22 +0000 Subject: [PATCH] netlabel: If PF_INET6, check sk_buff ip header version When resolving a fallback label, check the sk_buff version as it is possible (e.g. SCTP) to have family = PF_INET6 while receiving ip_hdr(skb)->version = 4. Signed-off-by: Richard Haines Acked-by: Paul Moore Signed-off-by: Paul Moore --- net/netlabel/netlabel_unlabeled.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c index 22dc1b9d6362..c070dfc0190a 100644 --- a/net/netlabel/netlabel_unlabeled.c +++ b/net/netlabel/netlabel_unlabeled.c @@ -1472,6 +1472,16 @@ int netlbl_unlabel_getattr(const struct sk_buff *skb, iface = rcu_dereference(netlbl_unlhsh_def); if (iface == NULL || !iface->valid) goto unlabel_getattr_nolabel; + +#if IS_ENABLED(CONFIG_IPV6) + /* When resolving a fallback label, check the sk_buff version as + * it is possible (e.g. SCTP) to have family = PF_INET6 while + * receiving ip_hdr(skb)->version = 4. + */ + if (family == PF_INET6 && ip_hdr(skb)->version == 4) + family = PF_INET; +#endif /* IPv6 */ + switch (family) { case PF_INET: { struct iphdr *hdr4; -- 2.30.2