From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 497CCC433F5 for ; Fri, 7 Sep 2018 21:33:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0AB8220844 for ; Fri, 7 Sep 2018 21:33:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0AB8220844 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729812AbeIHCQM (ORCPT ); Fri, 7 Sep 2018 22:16:12 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:51600 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726032AbeIHCQM (ORCPT ); Fri, 7 Sep 2018 22:16:12 -0400 Received: from localhost (ip-213-127-74-90.ip.prioritytelecom.net [213.127.74.90]) by mail.linuxfoundation.org (Postfix) with ESMTPSA id 6C438F4A; Fri, 7 Sep 2018 21:33:19 +0000 (UTC) From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org, Eric Van Hensbergen , Ron Minnich , Latchesar Ionkov Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Tomas Bortoli , syzbot+39749ed7d9ef6dfb23f6@syzkaller.appspotmail.com, Yiwen Jiang , Dominique Martinet Subject: [PATCH 4.9 18/63] net/9p/trans_fd.c: fix race-condition by flushing workqueue before the kfree() Date: Fri, 7 Sep 2018 23:09:49 +0200 Message-Id: <20180907211014.001725757@linuxfoundation.org> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20180907211012.965501324@linuxfoundation.org> References: <20180907211012.965501324@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Tomas Bortoli commit 430ac66eb4c5b5c4eb846b78ebf65747510b30f1 upstream. The patch adds the flush in p9_mux_poll_stop() as it the function used by p9_conn_destroy(), in turn called by p9_fd_close() to stop the async polling associated with the data regarding the connection. Link: http://lkml.kernel.org/r/20180720092730.27104-1-tomasbortoli@gmail.com Signed-off-by: Tomas Bortoli Reported-by: syzbot+39749ed7d9ef6dfb23f6@syzkaller.appspotmail.com To: Eric Van Hensbergen To: Ron Minnich To: Latchesar Ionkov Cc: Yiwen Jiang Cc: stable@vger.kernel.org Signed-off-by: Dominique Martinet Signed-off-by: Greg Kroah-Hartman --- net/9p/trans_fd.c | 2 ++ 1 file changed, 2 insertions(+) --- a/net/9p/trans_fd.c +++ b/net/9p/trans_fd.c @@ -181,6 +181,8 @@ static void p9_mux_poll_stop(struct p9_c spin_lock_irqsave(&p9_poll_lock, flags); list_del_init(&m->poll_pending_link); spin_unlock_irqrestore(&p9_poll_lock, flags); + + flush_work(&p9_poll_work); } /**