Patch "net: ipv6: check route protocol when deleting routes" has been added to the 4.4-stable tree

Patch "net: ipv6: check route protocol when deleting routes" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    net: ipv6: check route protocol when deleting routes

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     net-ipv6-check-route-protocol-when-deleting-routes.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From c2ed1880fd61a998e3ce40254a99a2ad000f1a7d Mon Sep 17 00:00:00 2001
From: Mantas M <grawity@gmail.com>
Date: Fri, 16 Dec 2016 10:30:59 +0200
Subject: net: ipv6: check route protocol when deleting routes
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Mantas M <grawity@gmail.com>

commit c2ed1880fd61a998e3ce40254a99a2ad000f1a7d upstream.

The protocol field is checked when deleting IPv4 routes, but ignored for
IPv6, which causes problems with routing daemons accidentally deleting
externally set routes (observed by multiple bird6 users).

This can be verified using `ip -6 route del <prefix> proto something`.

Signed-off-by: Mantas Mikulėnas <grawity@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Cc: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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

--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2084,6 +2084,8 @@ static int ip6_route_del(struct fib6_con
 				continue;
 			if (cfg->fc_metric && cfg->fc_metric != rt->rt6i_metric)
 				continue;
+			if (cfg->fc_protocol && cfg->fc_protocol != rt->rt6i_protocol)
+				continue;
 			dst_hold(&rt->dst);
 			read_unlock_bh(&table->tb6_lock);
 


Patches currently in stable-queue which might be from grawity@gmail.com are

queue-4.4/net-ipv6-check-route-protocol-when-deleting-routes.patch