{"id":805932,"url":"http://patchwork.ozlabs.org/api/patches/805932/?format=json","web_url":"http://patchwork.ozlabs.org/project/netdev/patch/a24249adef0fe79cf7405fa84d798e67b642c8a9.1503671776.git.g.nault@alphalink.fr/","project":{"id":7,"url":"http://patchwork.ozlabs.org/api/projects/7/?format=json","name":"Linux network development","link_name":"netdev","list_id":"netdev.vger.kernel.org","list_email":"netdev@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"","list_archive_url":null,"date":"2017-08-25T14:51:42","name":"[net,3/5] l2tp: hold tunnel while handling genl tunnel updates","commit_ref":null,"pull_url":null,"state":"accepted","archived":true,"hash":"6491f5364c15423edbd307597706995ca9d16d1a","submitter":{"id":22975,"url":"http://patchwork.ozlabs.org/api/people/22975/?format=json","name":"Guillaume Nault","email":"g.nault@alphalink.fr"},"delegate":{"id":34,"url":"http://patchwork.ozlabs.org/api/users/34/?format=json","username":"davem","first_name":"David","last_name":"Miller","email":"davem@davemloft.net"},"mbox":"http://patchwork.ozlabs.org/project/netdev/patch/a24249adef0fe79cf7405fa84d798e67b642c8a9.1503671776.git.g.nault@alphalink.fr/mbox/","series":[],"comments":"http://patchwork.ozlabs.org/api/patches/805932/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/805932/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xf3zG2mYPz9sN5\n\tfor ;\n\tSat, 26 Aug 2017 00:52:10 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1757304AbdHYOwI (ORCPT );\n\tFri, 25 Aug 2017 10:52:08 -0400","from zimbra.alphalink.fr ([217.15.80.77]:53425 \"EHLO\n\tzimbra.alphalink.fr\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1757282AbdHYOvu (ORCPT\n\t); Fri, 25 Aug 2017 10:51:50 -0400","from localhost (localhost [127.0.0.1])\n\tby mail-2-cbv2.admin.alphalink.fr (Postfix) with ESMTP id\n\t9174A2B5206F; Fri, 25 Aug 2017 16:51:49 +0200 (CEST)","from zimbra.alphalink.fr ([127.0.0.1])\n\tby localhost (mail-2-cbv2.admin.alphalink.fr [127.0.0.1])\n\t(amavisd-new, port 10032)\n\twith ESMTP id WFqX4UlizPFc; Fri, 25 Aug 2017 16:51:43 +0200 (CEST)","from localhost (localhost [127.0.0.1])\n\tby mail-2-cbv2.admin.alphalink.fr (Postfix) with ESMTP id\n\t4F11D2B5214B; Fri, 25 Aug 2017 16:51:43 +0200 (CEST)","from zimbra.alphalink.fr ([127.0.0.1])\n\tby localhost (mail-2-cbv2.admin.alphalink.fr [127.0.0.1])\n\t(amavisd-new, port 10026)\n\twith ESMTP id 4Il05nGXAA0i; Fri, 25 Aug 2017 16:51:43 +0200 (CEST)","from c-dev-0.admin.alphalink.fr (94-84-15-217.reverse.alphalink.fr\n\t[217.15.84.94])\n\tby mail-2-cbv2.admin.alphalink.fr (Postfix) with ESMTP id\n\t22FC62B5206F; Fri, 25 Aug 2017 16:51:43 +0200 (CEST)","by c-dev-0.admin.alphalink.fr (Postfix, from userid 1000)\n\tid 072C86024C; Fri, 25 Aug 2017 16:51:42 +0200 (CEST)"],"X-Virus-Scanned":"amavisd-new at mail-2-cbv2.admin.alphalink.fr","Date":"Fri, 25 Aug 2017 16:51:42 +0200","From":"Guillaume Nault ","To":"netdev@vger.kernel.org","Cc":"James Chapman ","Subject":"[PATCH net 3/5] l2tp: hold tunnel while handling genl tunnel updates","Message-ID":"","References":"","MIME-Version":"1.0","Content-Type":"text/plain; charset=us-ascii","Content-Disposition":"inline","In-Reply-To":"","X-Mutt-Fcc":"=Sent","User-Agent":"NeoMutt/20170609 (1.8.3)","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"},"content":"We need to make sure the tunnel is not going to be destroyed by\nl2tp_tunnel_destruct() concurrently.\n\nFixes: 309795f4bec2 (\"l2tp: Add netlink control API for L2TP\")\nSigned-off-by: Guillaume Nault \n---\n net/l2tp/l2tp_netlink.c | 6 ++++--\n 1 file changed, 4 insertions(+), 2 deletions(-)","diff":"diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c\nindex 808966550620..d61e75b4e619 100644\n--- a/net/l2tp/l2tp_netlink.c\n+++ b/net/l2tp/l2tp_netlink.c\n@@ -303,8 +303,8 @@ static int l2tp_nl_cmd_tunnel_modify(struct sk_buff *skb, struct genl_info *info\n \t}\n \ttunnel_id = nla_get_u32(info->attrs[L2TP_ATTR_CONN_ID]);\n \n-\ttunnel = l2tp_tunnel_find(net, tunnel_id);\n-\tif (tunnel == NULL) {\n+\ttunnel = l2tp_tunnel_get(net, tunnel_id);\n+\tif (!tunnel) {\n \t\tret = -ENODEV;\n \t\tgoto out;\n \t}\n@@ -315,6 +315,8 @@ static int l2tp_nl_cmd_tunnel_modify(struct sk_buff *skb, struct genl_info *info\n \tret = l2tp_tunnel_notify(&l2tp_nl_family, info,\n \t\t\t\t tunnel, L2TP_CMD_TUNNEL_MODIFY);\n \n+\tl2tp_tunnel_dec_refcount(tunnel);\n+\n out:\n \treturn ret;\n }\n","prefixes":["net","3/5"]}