From mboxrd@z Thu Jan 1 00:00:00 1970 From: chenweilong Subject: [PATCH 3.4-stable v2] ipv6: reallocate addrconf router for ipv6 address when lo device up Date: Wed, 6 Aug 2014 16:18:17 +0800 Message-ID: <53E1E4C9.4010006@huawei.com> Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit Cc: netdev , Greg Kroah-Hartman , , Sabrina Dubroca , Hannes Frederic Sowa , "Gao feng" , Li Zefan To: David Miller Return-path: Received: from szxga01-in.huawei.com ([119.145.14.64]:3316 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754695AbaHFIW0 (ORCPT ); Wed, 6 Aug 2014 04:22:26 -0400 Sender: netdev-owner@vger.kernel.org List-ID: It fix the bug 67951 on bugzilla https://bugzilla.kernel.org/show_bug.cgi?id=67951 The patch can't be applied directly, as it' used the function introduced by "commit 94e187c0" ip6_rt_put(), that patch can't be applied directly either. ==================== From: Gao feng commit 33d99113b1102c2d2f8603b9ba72d89d915c13f5 upstream. This commit don't have a stable tag, but it fix the bug no reply after loopback down-up.It's very worthy to be applied to stable 3.4 kernels. The bug is 67951 on bugzilla https://bugzilla.kernel.org/show_bug.cgi?id=67951 CC: Sabrina Dubroca CC: Hannes Frederic Sowa Reported-by: Weilong Chen Signed-off-by: Weilong Chen Signed-off-by: Gao feng Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller [weilong: s/ip6_rt_put/dst_release] Signed-off-by: Chen Weilong --- net/ipv6/addrconf.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c index abfa007..25399bf 100644 --- a/net/ipv6/addrconf.c +++ b/net/ipv6/addrconf.c @@ -2435,8 +2435,18 @@ static void init_loopback(struct net_device *dev) if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE)) continue; - if (sp_ifa->rt) - continue; + if (sp_ifa->rt) { + /* This dst has been added to garbage list when + * lo device down, release this obsolete dst and + * reallocate a new router for ifa. + */ + if (sp_ifa->rt->dst.obsolete > 0) { + dst_release(&sp_ifa->rt->dst); + sp_ifa->rt = NULL; + } else { + continue; + } + } sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0); -- 1.7.12