[PATCH 3.12 087/127] ip6_gre: fix flowi6_proto value in ip6gre_xmit_other()

From: Jiri Slaby
Date: Fri Nov 25 2016 - 03:41:50 EST

From: Lance Richardson <lrichard@xxxxxxxxxx>

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


[ Upstream commit db32e4e49ce2b0e5fcc17803d011a401c0a637f6 ]

Similar to commit 3be07244b733 ("ip6_gre: fix flowi6_proto value in
xmit path"), set flowi6_proto to IPPROTO_GRE for output route lookup.

Up until now, ip6gre_xmit_other() has set flowi6_proto to a bogus value.
This affected output route lookup for packets sent on an ip6gretap device
in cases where routing was dependent on the value of flowi6_proto.

Since the correct proto is already set in the tunnel flowi6 template via
commit 252f3f5a1189 ("ip6_gre: Set flowi6_proto as IPPROTO_GRE in xmit
path."), simply delete the line setting the incorrect flowi6_proto value.

Suggested-by: Jiri Benc <jbenc@xxxxxxxxxx>
Fixes: c12b395a4664 ("gre: Support GRE over IPv6")
Reviewed-by: Shmulik Ladkani <shmulik.ladkani@xxxxxxxxx>
Signed-off-by: Lance Richardson <lrichard@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
net/ipv6/ip6_gre.c | 1 -
1 file changed, 1 deletion(-)

diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 737af492ed75..6b5acd50103f 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -895,7 +895,6 @@ static int ip6gre_xmit_other(struct sk_buff *skb, struct net_device *dev)
encap_limit = t->parms.encap_limit;

memcpy(&fl6, &t->fl.u.ip6, sizeof(fl6));
- fl6.flowi6_proto = skb->protocol;

err = ip6gre_xmit2(skb, dev, 0, &fl6, encap_limit, &mtu);