linux-kernel - [PATCH 4.7 134/184] ipv6: Dont unset flowi6_proto in ipxip6_tnl

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Date:   Thu, 22 Sep 2016 19:41:08 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Eli Cooper <elicooper@....com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.7 134/184] ipv6: Dont unset flowi6_proto in ipxip6_tnl_xmit()

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

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

From: Eli Cooper <elicooper@....com>

commit ab34380162cbc9b5172afdadf5136643c687bb73 upstream.

Commit 8eb30be0352d0916 ("ipv6: Create ip6_tnl_xmit") unsets
flowi6_proto in ip4ip6_tnl_xmit() and ip6ip6_tnl_xmit().
Since xfrm_selector_match() relies on this info, IPv6 packets
sent by an ip6tunnel cannot be properly selected by their
protocols after removing it. This patch puts flowi6_proto back.

Fixes: 8eb30be0352d ("ipv6: Create ip6_tnl_xmit")
Signed-off-by: Eli Cooper <elicooper@....com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/ipv6/ip6_tunnel.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -1174,6 +1174,7 @@ ip4ip6_tnl_xmit(struct sk_buff *skb, str
 		encap_limit = t->parms.encap_limit;

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

 	dsfield = ipv4_get_dsfield(iph);

@@ -1233,6 +1234,7 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, str
 		encap_limit = t->parms.encap_limit;

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

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