From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758087Ab2JJXCK (ORCPT ); Wed, 10 Oct 2012 19:02:10 -0400 Received: from out1-smtp.messagingengine.com ([66.111.4.25]:52478 "EHLO out1-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757164Ab2JJXCC (ORCPT ); Wed, 10 Oct 2012 19:02:02 -0400 X-Sasl-enc: RzN3dIL3H87PkUqp5rnkNbgO3Ui5OxodauRPjVEXb8FZ 1349910121 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Greg Kroah-Hartman , alan@lxorguk.ukuu.org.uk, Nicolas Dichtel , "David S. Miller" Subject: [ 036/122] ipv6: del unreachable route when an addr is deleted on lo Date: Thu, 11 Oct 2012 07:53:22 +0900 Message-Id: <20121010225344.645263127@linuxfoundation.org> X-Mailer: git-send-email 1.8.0.rc0.18.gf84667d In-Reply-To: <20121010225337.989799482@linuxfoundation.org> References: <20121010225337.989799482@linuxfoundation.org> User-Agent: quilt/0.60-2.1.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Nicolas Dichtel [ Upstream commit 64c6d08e6490fb18cea09bb03686c149946bd818 ] When an address is added on loopback (ip -6 a a 2002::1/128 dev lo), two routes are added: - one in the local table: local 2002::1 via :: dev lo proto none metric 0 - one the in main table (for the prefix): unreachable 2002::1 dev lo proto kernel metric 256 error -101 When the address is deleted, the route inserted in the main table remains because we use rt6_lookup(), which returns NULL when dst->error is set, which is the case here! Thus, it is better to use ip6_route_lookup() to avoid this kind of filter. Signed-off-by: Nicolas Dichtel Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv6/addrconf.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -788,10 +788,16 @@ static void ipv6_del_addr(struct inet6_i struct in6_addr prefix; struct rt6_info *rt; struct net *net = dev_net(ifp->idev->dev); + struct flowi6 fl6 = {}; + ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len); - rt = rt6_lookup(net, &prefix, NULL, ifp->idev->dev->ifindex, 1); + fl6.flowi6_oif = ifp->idev->dev->ifindex; + fl6.daddr = prefix; + rt = (struct rt6_info *)ip6_route_lookup(net, &fl6, + RT6_LOOKUP_F_IFACE); - if (rt && addrconf_is_prefix_route(rt)) { + if (rt != net->ipv6.ip6_null_entry && + addrconf_is_prefix_route(rt)) { if (onlink == 0) { ip6_del_rt(rt); rt = NULL;