From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752632AbdKVC7r (ORCPT ); Tue, 21 Nov 2017 21:59:47 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:56441 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751570AbdKVCUL (ORCPT ); Tue, 21 Nov 2017 21:20:11 -0500 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, "Mauro Carvalho Chehab" , "Andrey Konovalov" , "Sean Young" , "Arvind Yadav" Date: Wed, 22 Nov 2017 02:11:06 +0000 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.2 57/61] media: imon: Fix null-ptr-deref in imon_probe In-Reply-To: X-SA-Exim-Connect-IP: 2a02:8011:400e:2:6f00:88c8:c921:d332 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 3.2.96-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Arvind Yadav commit 58fd55e838276a0c13d1dc7c387f90f25063cbf3 upstream. It seems that the return value of usb_ifnum_to_if() can be NULL and needs to be checked. Signed-off-by: Arvind Yadav Tested-by: Andrey Konovalov Signed-off-by: Sean Young Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Ben Hutchings --- drivers/media/rc/imon.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/media/rc/imon.c +++ b/drivers/media/rc/imon.c @@ -2318,6 +2318,11 @@ static int __devinit imon_probe(struct u mutex_lock(&driver_lock); first_if = usb_ifnum_to_if(usbdev, 0); + if (!first_if) { + ret = -ENODEV; + goto fail; + } + first_if_ctx = usb_get_intfdata(first_if); if (ifnum == 0) {