From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: 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 3.18 06/29] net/9p/trans_fd.c: fix race-condition by flushing workqueue before the kfree() Date: Fri, 7 Sep 2018 23:10:27 +0200 Message-Id: <20180907210910.032419049@linuxfoundation.org> In-Reply-To: <20180907210909.523240901@linuxfoundation.org> References: <20180907210909.523240901@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.18-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 @@ -185,6 +185,8 @@ 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); } /**