linux-kernel - [PATCH 3.12 01/78] ipv6: gre: fix wrong skb->protocol in WCCP

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Message-Id: <72002f1f248c28d1715d10454190e209d5a20fe1.1420799385.git.jslaby@suse.cz>
Date:	Fri,  9 Jan 2015 11:31:10 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Yuri Chislov <yuri.chislov@...il.com>,
	Dmitry Kozlov <xeb@...l.ru>,
	Daniel Borkmann <dborkman@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 01/78] ipv6: gre: fix wrong skb->protocol in WCCP

From: Yuri Chislov <yuri.chislov@...il.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

[ Upstream commit be6572fdb1bfbe23b2624d477de50af50b02f5d6 ]

When using GRE redirection in WCCP, it sets the wrong skb->protocol,
that is, ETH_P_IP instead of ETH_P_IPV6 for the encapuslated traffic.

Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Cc: Dmitry Kozlov <xeb@...l.ru>
Signed-off-by: Yuri Chislov <yuri.chislov@...il.com>
Tested-by: Yuri Chislov <yuri.chislov@...il.com>
Signed-off-by: Daniel Borkmann <dborkman@...hat.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 net/ipv6/ip6_gre.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 88774ccb3dda..7d640f276e87 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -511,11 +511,11 @@ static int ip6gre_rcv(struct sk_buff *skb)
 
 		skb->protocol = gre_proto;
 		/* WCCP version 1 and 2 protocol decoding.
-		 * - Change protocol to IP
+		 * - Change protocol to IPv6
 		 * - When dealing with WCCPv2, Skip extra 4 bytes in GRE header
 		 */
 		if (flags == 0 && gre_proto == htons(ETH_P_WCCP)) {
-			skb->protocol = htons(ETH_P_IP);
+			skb->protocol = htons(ETH_P_IPV6);
 			if ((*(h + offset) & 0xF0) != 0x40)
 				offset += 4;
 		}
-- 
2.2.1

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