ipv6: fix a refcnt leak with peer addr

There is no reason to take a refcnt before deleting the peer address route.
It's done some lines below for the local prefix route because
inet6_ifa_finish_destroy() will release it at the end.
For the peer address route, we want to free it right now.

This bug has been introduced by commit
caeaba79009c ("ipv6: add support of peer address").

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 5 deletions

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index aa0e135b808c..ce761c7e6675 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -4772,11 +4772,8 @@ static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
 
                         rt = rt6_lookup(dev_net(dev), &ifp->peer_addr, NULL,
                                         dev->ifindex, 1);
-                        if (rt) {
-                                dst_hold(&rt->dst);
-                                if (ip6_del_rt(rt))
-                                        dst_free(&rt->dst);
-                        }
+                        if (rt && ip6_del_rt(rt))
+                                dst_free(&rt->dst);
                 }
                 dst_hold(&ifp->rt->dst);