Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754992AbcDZX1w (ORCPT ); Tue, 26 Apr 2016 19:27:52 -0400 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:41018 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754282AbcDZX1r (ORCPT ); Tue, 26 Apr 2016 19:27:47 -0400 Content-Type: text/plain; charset="UTF-8" Content-Disposition: inline Content-Transfer-Encoding: 8bit MIME-Version: 1.0 From: Ben Hutchings To: linux-kernel@vger.kernel.org, stable@vger.kernel.org CC: akpm@linux-foundation.org, "Oliver Neukum" , "Oliver Neukum" , "David S. Miller" Date: Wed, 27 Apr 2016 01:02:24 +0200 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.2 081/115] usbnet: cleanup after bind() in probe() In-Reply-To: X-SA-Exim-Connect-IP: 2a02:8426:ae4:c500:9cba:69ae:962d:6167 X-SA-Exim-Mail-From: ben@decadent.org.uk X-SA-Exim-Scanned: No (on shadbolt.decadent.org.uk); SAEximRunCond expanded to false Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1219 Lines: 38 3.2.80-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Oliver Neukum commit 1666984c8625b3db19a9abc298931d35ab7bc64b upstream. In case bind() works, but a later error forces bailing in probe() in error cases work and a timer may be scheduled. They must be killed. This fixes an error case related to the double free reported in http://www.spinics.net/lists/netdev/msg367669.html and needs to go on top of Linus' fix to cdc-ncm. Signed-off-by: Oliver Neukum Signed-off-by: David S. Miller Signed-off-by: Ben Hutchings --- drivers/net/usb/usbnet.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1486,6 +1486,13 @@ out3: if (info->unbind) info->unbind (dev, udev); out1: + /* subdrivers must undo all they did in bind() if they + * fail it, but we may fail later and a deferred kevent + * may trigger an error resubmitting itself and, worse, + * schedule a timer. So we kill it all just in case. + */ + cancel_work_sync(&dev->kevent); + del_timer_sync(&dev->delay); free_netdev(net); out: usb_put_dev(xdev);