From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933352AbcBIAVc (ORCPT ); Mon, 8 Feb 2016 19:21:32 -0500 Received: from shadbolt.e.decadent.org.uk ([88.96.1.126]:59737 "EHLO shadbolt.e.decadent.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755354AbcBHXyh (ORCPT ); Mon, 8 Feb 2016 18:54:37 -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, "Hans Verkuil" , "Mauro Carvalho Chehab" , "Alexey Khoroshilov" Date: Mon, 08 Feb 2016 23:53:51 +0000 Message-ID: X-Mailer: LinuxStableQueue (scripts by bwh) Subject: [PATCH 3.2 84/87] [media] usbvision-video: fix memory leak of alt_max_pkt_size In-Reply-To: X-SA-Exim-Connect-IP: 2a02:8011:400e:2:a11:96ff:fe28:a980 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 3.2.77-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Alexey Khoroshilov commit 090c65b694c362adb19ec9c27de216a808ee443c upstream. 1. usbvision->alt_max_pkt_size is not deallocated anywhere. 2. if allocation of usbvision->alt_max_pkt_size fails, there is no proper deallocation of already acquired resources. The patch adds kfree(usbvision->alt_max_pkt_size) to usbvision_release() as soon as other deallocations happen there. It calls usbvision_release() if allocation of usbvision->alt_max_pkt_size fails as soon as usbvision_release() is safe to work with incompletely initialized usbvision structure. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab [bwh: Backported to 3.2: adjust filename] Signed-off-by: Ben Hutchings --- drivers/media/video/usbvision/usbvision-video.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/media/video/usbvision/usbvision-video.c +++ b/drivers/media/video/usbvision/usbvision-video.c @@ -1425,6 +1425,7 @@ static void usbvision_release(struct usb usbvision_remove_sysfs(usbvision->vdev); usbvision_unregister_video(usbvision); + kfree(usbvision->alt_max_pkt_size); usb_free_urb(usbvision->ctrl_urb); @@ -1540,6 +1541,7 @@ static int __devinit usbvision_probe(str usbvision->alt_max_pkt_size = kmalloc(32 * usbvision->num_alt, GFP_KERNEL); if (usbvision->alt_max_pkt_size == NULL) { dev_err(&intf->dev, "usbvision: out of memory!\n"); + usbvision_release(usbvision); return -ENOMEM; }