[PATCH 3.17 01/25] ip6_gre: fix flowi6_proto value in xmit path

From: Greg Kroah-Hartman
Date: Sun Oct 12 2014 - 22:37:11 EST

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


From: Nicolas Dichtel <nicolas.dichtel@xxxxxxxxx>

[ Upstream commit 3be07244b7337760a3269d56b2f4a63e72218648 ]

In xmit path, we build a flowi6 which will be used for the output route lookup.
We are sending a GRE packet, neither IPv4 nor IPv6 encapsulated packet, thus the
protocol should be IPPROTO_GRE.

Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Reported-by: Matthieu Ternisien d'Ouville <matthieu.tdo@xxxxxxxxx>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
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
@@ -782,7 +782,7 @@ static inline int ip6gre_xmit_ipv4(struc
encap_limit = t->parms.encap_limit;

memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6));
- fl6.flowi6_proto = IPPROTO_IPIP;
+ fl6.flowi6_proto = IPPROTO_GRE;

dsfield = ipv4_get_dsfield(iph);

@@ -832,7 +832,7 @@ static inline int ip6gre_xmit_ipv6(struc
encap_limit = t->parms.encap_limit;

memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6));
- fl6.flowi6_proto = IPPROTO_IPV6;
+ fl6.flowi6_proto = IPPROTO_GRE;

dsfield = ipv6_get_dsfield(ipv6h);
if (t->parms.flags & IP6_TNL_F_USE_ORIG_TCLASS)

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