From 180a602a952853b20275823e4a75170a078f6c75 Mon Sep 17 00:00:00 2001
From: Mantas M <grawity@gmail.com>
Date: Fri, 16 Dec 2016 10:30:59 +0200
Subject: [PATCH] net: ipv6: check route protocol when deleting routes
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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: Jiri Slaby <jslaby@suse.cz>
---
 net/ipv6/route.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index e19817a090c7..a4238c684a91 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1754,6 +1754,8 @@ static int ip6_route_del(struct fib6_config *cfg)
 				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);
 
-- 
2.43.0