Patch "net: ipv6: check route protocol when deleting routes" has been added to the 4.9-stable tree

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 4.9-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-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Mantas M <[email protected]>
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 <[email protected]>

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.

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

@@ -2166,6 +2166,8 @@ 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 [email protected] are

queue-4.9/net-ipv6-check-route-protocol-when-deleting-routes.patch