From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9AD61C43603 for ; Tue, 10 Dec 2019 22:11:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 667DD2053B for ; Tue, 10 Dec 2019 22:11:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576015914; bh=tzIWuL4I+oLhLcnJ0dkLgbGro6s7v09DuAocLYhOiF4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=pQMvDFz4LP4Kuj+PpeTCMoKkIuIoOAGDSBZDzjdL+Iu4AX3usZ/Rp4m4wFfzh/+YE eJdezpDfPpFi481OL69YXFWfjnAAK5VvCWBPhCjBQaWzKFpPx296MEo2frU6kJvp32 OjAom/n4fUKOurV9etqeyOItRIyXOfvMGByw5NPk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729461AbfLJWLx (ORCPT ); Tue, 10 Dec 2019 17:11:53 -0500 Received: from mail.kernel.org ([198.145.29.99]:34126 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728135AbfLJWDr (ORCPT ); Tue, 10 Dec 2019 17:03:47 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2D5A52053B; Tue, 10 Dec 2019 22:03:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576015427; bh=tzIWuL4I+oLhLcnJ0dkLgbGro6s7v09DuAocLYhOiF4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=N1G1ikLGeJEIZrQ7WdiOWSD74Tk2KDEdKlzQLFoSsOrMwePqia/9rJxAI3xh8dor/ NMkWhoiizmOqRB4dzsWYWEnQhA66uJIP5WUlXxE20k2NxgjXBc/7BdtS9qmSQr4TT0 WP7sA674iSxFPTo9mcAnxjRlENAhDUujXsvt+p/E= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Benoit Parrot , Tomi Valkeinen , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin , linux-media@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 038/130] media: ti-vpe: vpe: fix a v4l2-compliance failure causing a kernel panic Date: Tue, 10 Dec 2019 17:01:29 -0500 Message-Id: <20191210220301.13262-38-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191210220301.13262-1-sashal@kernel.org> References: <20191210220301.13262-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Benoit Parrot [ Upstream commit a37980ac5be29b83da67bf7d571c6bd9f90f8e45 ] v4l2-compliance fails with this message: warn: v4l2-test-formats.cpp(717): \ TRY_FMT cannot handle an invalid pixelformat. test VIDIOC_TRY_FMT: FAIL This causes the following kernel panic: Unable to handle kernel paging request at virtual address 56595561 pgd = ecd80e00 *pgd=00000000 Internal error: Oops: 205 [#1] PREEMPT SMP ARM ... CPU: 0 PID: 930 Comm: v4l2-compliance Not tainted \ 4.14.62-01715-gc8cd67f49a19 #1 Hardware name: Generic DRA72X (Flattened Device Tree) task: ece44d80 task.stack: ecc6e000 PC is at __vpe_try_fmt+0x18c/0x2a8 [ti_vpe] LR is at 0x8 Because the driver fails to properly check the 'num_planes' values for proper ranges it ends up accessing out of bound data causing the kernel panic. Since this driver only handle single or dual plane pixel format, make sure the provided value does not exceed 2 planes. Signed-off-by: Benoit Parrot Reviewed-by: Tomi Valkeinen Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/platform/ti-vpe/vpe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c index a136fb14bf1a7..5adafee98e4c4 100644 --- a/drivers/media/platform/ti-vpe/vpe.c +++ b/drivers/media/platform/ti-vpe/vpe.c @@ -1663,7 +1663,7 @@ static int __vpe_try_fmt(struct vpe_ctx *ctx, struct v4l2_format *f, &pix->height, MIN_H, MAX_H, H_ALIGN, S_ALIGN); - if (!pix->num_planes) + if (!pix->num_planes || pix->num_planes > 2) pix->num_planes = fmt->coplanar ? 2 : 1; else if (pix->num_planes > 1 && !fmt->coplanar) pix->num_planes = 1; -- 2.20.1