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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C2872C7EE23 for ; Mon, 22 May 2023 19:39:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235038AbjEVTjd (ORCPT ); Mon, 22 May 2023 15:39:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235031AbjEVTja (ORCPT ); Mon, 22 May 2023 15:39:30 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 54BB09C for ; Mon, 22 May 2023 12:39:25 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id E609E629DE for ; Mon, 22 May 2023 19:39:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id C588CC433D2; Mon, 22 May 2023 19:39:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1684784364; bh=3RQ3NpkUvKvMX1Q9TThOfZqbeNUdpgUUkq+Yf3PtgjM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=gEKofzya2y0//CGS7y1tSd0rpcnyLpzADU8AUsg4zii3xxAP01FnmM2Z26FnyGPMI sHqsuvVe6ccZ3MNrXgh/nvhgy91ZTYxg7wiOD3I54bhTZw/OL+FJRwYjyzPS20IpA2 6hsOc1Yysi5kwHQVbM71o+UqUdg/npksBMca9Ez4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Mirela Rabulea , NXP Linux Team , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , linux-arm-kernel@lists.infradead.org, Kees Cook , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin Subject: [PATCH 6.3 057/364] media: imx-jpeg: Bounds check sizeimage access Date: Mon, 22 May 2023 20:06:02 +0100 Message-Id: <20230522190414.222626164@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230522190412.801391872@linuxfoundation.org> References: <20230522190412.801391872@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Kees Cook [ Upstream commit 474acc639fc8671fa4c1919d9e03253c82b6d321 ] The call of mxc_jpeg_get_plane_size() from mxc_jpeg_dec_irq() sets plane_no argument to 1. The compiler sees that it's possible to end up with an access beyond the bounds of sizeimage, if mem_planes was too large: if (plane_no >= fmt->mem_planes) // mem_planes = 2+ return 0; if (fmt->mem_planes == fmt->comp_planes) // comp_planes != mem_planes return q_data->sizeimage[plane_no]; if (plane_no < fmt->mem_planes - 1) // mem_planes = 2 return q_data->sizeimage[plane_no]; comp_planes == 0 or 1 is safe. comp_planes > 2 would be out of bounds. (This isn't currently possible given the contents of mxc_formats, though.) Silence the warning by bounds checking comp_planes for future robustness. Seen with GCC 13: In function 'mxc_jpeg_get_plane_size', inlined from 'mxc_jpeg_dec_irq' at ../drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c:729:14: ../drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c:641:42: warning: array subscript 2 is above array bounds of 'u32[2]' {aka 'unsigned int[2]'} [-Warray-bounds=] 641 | size += q_data->sizeimage[i]; | ~~~~~~~~~~~~~~~~~^~~ In file included from ../drivers/media/platform/nxp/imx-jpeg/mxc-jpeg-hw.h:112, from ../drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c:63: ../drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.h: In function 'mxc_jpeg_dec_irq': ../drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.h:84:41: note: while referencing 'sizeimage' 84 | u32 sizeimage[MXC_JPEG_MAX_PLANES]; | ^~~~~~~~~ Cc: Mirela Rabulea Cc: NXP Linux Team Cc: Shawn Guo Cc: Sascha Hauer Cc: Pengutronix Kernel Team Cc: Fabio Estevam Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Kees Cook Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c index f085f14d676ad..c898116b763a2 100644 --- a/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c +++ b/drivers/media/platform/nxp/imx-jpeg/mxc-jpeg.c @@ -637,6 +637,11 @@ static u32 mxc_jpeg_get_plane_size(struct mxc_jpeg_q_data *q_data, u32 plane_no) return q_data->sizeimage[plane_no]; size = q_data->sizeimage[fmt->mem_planes - 1]; + + /* Should be impossible given mxc_formats. */ + if (WARN_ON_ONCE(fmt->comp_planes > ARRAY_SIZE(q_data->sizeimage))) + return size; + for (i = fmt->mem_planes; i < fmt->comp_planes; i++) size += q_data->sizeimage[i]; -- 2.39.2