From: Yuri Chislov <[email protected]>

This patch has been added to the 3.12 stable tree. If you have any
objections, please let us 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 <[email protected]>
Signed-off-by: Yuri Chislov <[email protected]>
Tested-by: Yuri Chislov <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Jiri Slaby <[email protected]>
---
 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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