From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:35634 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753369AbbJAJcR (ORCPT ); Thu, 1 Oct 2015 05:32:17 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dmitry Kozlov , huaibin Wang , Nicolas Dichtel , "David S. Miller" Subject: [PATCH 4.1 01/29] ip6_gre: release cached dst on tunnel removal Date: Thu, 1 Oct 2015 11:31:37 +0200 Message-Id: <20151001093145.789905550@linuxfoundation.org> In-Reply-To: <20151001093145.730759857@linuxfoundation.org> References: <20151001093145.730759857@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: stable-owner@vger.kernel.org List-ID: 4.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: huaibin Wang [ Upstream commit d4257295ba1b389c693b79de857a96e4b7cd8ac0 ] When a tunnel is deleted, the cached dst entry should be released. This problem may prevent the removal of a netns (seen with a x-netns IPv6 gre tunnel): unregister_netdevice: waiting for lo to become free. Usage count = 3 CC: Dmitry Kozlov Fixes: c12b395a4664 ("gre: Support GRE over IPv6") Signed-off-by: huaibin Wang Signed-off-by: Nicolas Dichtel Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/ipv6/ip6_gre.c | 1 + 1 file changed, 1 insertion(+) --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -361,6 +361,7 @@ static void ip6gre_tunnel_uninit(struct struct ip6gre_net *ign = net_generic(t->net, ip6gre_net_id); ip6gre_tunnel_unlink(ign, t); + ip6_tnl_dst_reset(t); dev_put(dev); }