Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752489AbcDZSSA (ORCPT ); Tue, 26 Apr 2016 14:18:00 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:56182 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752321AbcDZSR4 (ORCPT ); Tue, 26 Apr 2016 14:17:56 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Oliver Neukum , "David S . Miller" , Kamal Mostafa Subject: [PATCH 4.2.y-ckt 01/93] usbnet: cleanup after bind() in probe() Date: Tue, 26 Apr 2016 11:16:01 -0700 Message-Id: <1461694653-29506-2-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1461694653-29506-1-git-send-email-kamal@canonical.com> References: <1461694653-29506-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 4.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1375 Lines: 42 4.2.8-ckt9 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ 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: Kamal Mostafa --- drivers/net/usb/usbnet.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c index e049857..edbb2f3 100644 --- a/drivers/net/usb/usbnet.c +++ b/drivers/net/usb/usbnet.c @@ -1754,6 +1754,13 @@ 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: return status; -- 2.7.4