linux-kernel - [PATCH 3.14 19/34] ipv6: gre: fix wrong skb->protocol in WCCP

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Date:	Sun, 14 Dec 2014 12:20:57 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Dmitry Kozlov <xeb@...l.ru>,
	Yuri Chislov <yuri.chislov@...il.com>,
	Daniel Borkmann <dborkman@...hat.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: [PATCH 3.14 19/34] ipv6: gre: fix wrong skb->protocol in WCCP

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

------------------

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

[ 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: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/ipv6/ip6_gre.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -508,11 +508,11 @@ static int ip6gre_rcv(struct sk_buff *sk
 
 		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;
 		}


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