From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Sat, 21 Mar 2015 19:20:23 +0000 (+0100)
Subject: netfilter: ip6t_REJECT: check for IP6T_F_PROTO
X-Git-Tag: v6.6-pxa1908~21352^2~165^2
X-Git-Url: https://git.dujemihanovic.xyz/?a=commitdiff_plain;h=e35158e40110270600698f19bda5e21d8ce709d7;p=linux.git

netfilter: ip6t_REJECT: check for IP6T_F_PROTO

Make sure IP6T_F_PROTO is set to enforce layer 4 protocol matching from
the ip6_tables core.

Suggested-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---

diff --git a/net/ipv6/netfilter/ip6t_REJECT.c b/net/ipv6/netfilter/ip6t_REJECT.c
index 544b0a9da1b5..12331efd49cf 100644
--- a/net/ipv6/netfilter/ip6t_REJECT.c
+++ b/net/ipv6/netfilter/ip6t_REJECT.c
@@ -83,7 +83,8 @@ static int reject_tg6_check(const struct xt_tgchk_param *par)
 		return -EINVAL;
 	} else if (rejinfo->with == IP6T_TCP_RESET) {
 		/* Must specify that it's a TCP packet */
-		if (e->ipv6.proto != IPPROTO_TCP ||
+		if (!(e->ipv6.flags & IP6T_F_PROTO) ||
+		    e->ipv6.proto != IPPROTO_TCP ||
 		    (e->ipv6.invflags & XT_INV_PROTO)) {
 			pr_info("TCP_RESET illegal for non-tcp\n");
 			return -EINVAL;