Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753798AbaFDXX1 (ORCPT ); Wed, 4 Jun 2014 19:23:27 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:40564 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753668AbaFDXXX (ORCPT ); Wed, 4 Jun 2014 19:23:23 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Guennadi Liakhovetski , Jonathan Corbet , Mauro Carvalho Chehab Subject: [PATCH 3.14 227/228] media: V4L2: ov7670: fix a wrong index, potentially Oopsing the kernel from user-space Date: Wed, 4 Jun 2014 16:24:16 -0700 Message-Id: <20140604232355.338599245@linuxfoundation.org> X-Mailer: git-send-email 1.9.0 In-Reply-To: <20140604232347.966798903@linuxfoundation.org> References: <20140604232347.966798903@linuxfoundation.org> User-Agent: quilt/0.63-1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 3.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Guennadi Liakhovetski commit cfece5857ca51d1dcdb157017aba226f594e9dcf upstream. Commit 75e2bdad8901a0b599e01a96229be922eef1e488 "ov7670: allow configuration of image size, clock speed, and I/O method" uses a wrong index to iterate an array. Apart from being wrong, it also uses an unchecked value from user-space, which can cause access to unmapped memory in the kernel, triggered by a normal desktop user with rights to use V4L2 devices. Signed-off-by: Guennadi Liakhovetski Acked-by: Jonathan Corbet Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Greg Kroah-Hartman --- drivers/media/i2c/ov7670.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/media/i2c/ov7670.c +++ b/drivers/media/i2c/ov7670.c @@ -1109,7 +1109,7 @@ static int ov7670_enum_framesizes(struct * windows that fall outside that. */ for (i = 0; i < n_win_sizes; i++) { - struct ov7670_win_size *win = &info->devtype->win_sizes[index]; + struct ov7670_win_size *win = &info->devtype->win_sizes[i]; if (info->min_width && win->width < info->min_width) continue; if (info->min_height && win->height < info->min_height) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/