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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,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 1316BC2D0CE for ; Sun, 29 Dec 2019 18:17:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E2CB1206A4 for ; Sun, 29 Dec 2019 18:17:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577643443; bh=fvMLFG8yuBkK7nSBE8ksWzysVA3V9rPrBM/VglFIglE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=YdrNFUa+P1NFE4KgnVCr9vw5e2bjaawEbQ3pFEToNhq0Pf4BnipuDrLmAVg3Lygq3 ShvJwPCWLE9ze52u1j/c6WF5EG2BnzgRC6eL0Hn2pFeXKjjqKp+jXZXm5dzMQK7jRS wfgnOXivxRohSv83Z5lyQ2H5OSa80xEE+5NBGmxY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727480AbfL2RXI (ORCPT ); Sun, 29 Dec 2019 12:23:08 -0500 Received: from mail.kernel.org ([198.145.29.99]:40326 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727054AbfL2RXG (ORCPT ); Sun, 29 Dec 2019 12:23:06 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2DCEB21744; Sun, 29 Dec 2019 17:23:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1577640185; bh=fvMLFG8yuBkK7nSBE8ksWzysVA3V9rPrBM/VglFIglE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0bYr43MBr61yMUM3+p4JP0gDdHj/4y4nJdgu5SuIWyypc8BMlJCd36gRoXViKz2zj 9lHd5RmNOEQ6Rls+eBjRqvekykDEZ+FZH4plhLOXW6SmQ2aj59FeEhIMNwklPBkIOa L9wpmkH866adrJkViosZ+sg/n0n+uWmAHriFeJLI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Benoit Parrot , Tomi Valkeinen , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 4.14 054/161] media: ti-vpe: vpe: fix a v4l2-compliance failure causing a kernel panic Date: Sun, 29 Dec 2019 18:18:22 +0100 Message-Id: <20191229162415.602142716@linuxfoundation.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191229162355.500086350@linuxfoundation.org> References: <20191229162355.500086350@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@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 a136fb14bf1a..5adafee98e4c 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