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 2D31CC636D4 for ; Wed, 8 Feb 2023 09:09:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231191AbjBHJJh (ORCPT ); Wed, 8 Feb 2023 04:09:37 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54646 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230337AbjBHJJR (ORCPT ); Wed, 8 Feb 2023 04:09:17 -0500 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A55D145BF1; Wed, 8 Feb 2023 01:09:08 -0800 (PST) X-UUID: 3883ce58a79011eda06fc9ecc4dadd91-20230208 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=5dmmAN53knGP8A38vOJ+8chP7YSe5P6lPPiDtcUaDnc=; b=ackzU80UetfWsnTwPin9CGR6eXZJw1y711GdFysAMpjEIfuL5MHBg4JQAIQ2EdZHnMtj3nzv70EBohKHheVk/P5pu+/w1+nSXeguqRB5szjcp9SCnu5bPH77XDTMdpjvv5Rslny2uifeQR4HS7G79GJH1aqvOiLBP5PNA1RQktw=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.19,REQID:913110f6-27e4-4d91-9d35-5e74cb636fa5,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:885ddb2,CLOUDID:0033d4f7-ff42-4fb0-b929-626456a83c14,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0 X-CID-BVR: 0,NGT X-UUID: 3883ce58a79011eda06fc9ecc4dadd91-20230208 Received: from mtkmbs10n2.mediatek.inc [(172.21.101.183)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 2101256463; Wed, 08 Feb 2023 17:08:58 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs11n1.mediatek.inc (172.21.101.185) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Wed, 8 Feb 2023 17:08:56 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Wed, 8 Feb 2023 17:08:56 +0800 From: Moudy Ho To: Mauro Carvalho Chehab , Matthias Brugger , Hans Verkuil , Ping-Hsun Wu CC: , , , , , Moudy Ho Subject: [PATCH v6 01/12] media: platform: mtk-mdp3: fix potential frame size overflow in mdp_try_fmt_mplane() Date: Wed, 8 Feb 2023 17:08:44 +0800 Message-ID: <20230208090855.18934-2-moudy.ho@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20230208090855.18934-1-moudy.ho@mediatek.com> References: <20230208090855.18934-1-moudy.ho@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Fix overflow risk when setting certain formats whose frame size exceeds a RGB24 with 7723x7723 resolution. For example, a 7723x7724 RGB24 frame: 1. bpl (byte per line) = 7723 * 3. 2. Overflow occurs when bpl * 7724 * depth. Fixes: 61890ccaefaf ("media: platform: mtk-mdp3: add MediaTek MDP3 driver") Signed-off-by: Moudy Ho --- drivers/media/platform/mediatek/mdp3/mtk-mdp3-regs.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-regs.c b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-regs.c index 4e84a37ecdfc..36336d169bd9 100644 --- a/drivers/media/platform/mediatek/mdp3/mtk-mdp3-regs.c +++ b/drivers/media/platform/mediatek/mdp3/mtk-mdp3-regs.c @@ -4,6 +4,7 @@ * Author: Ping-Hsun Wu */ +#include #include #include #include @@ -428,14 +429,15 @@ const struct mdp_format *mdp_try_fmt_mplane(struct v4l2_format *f, u32 bpl = pix_mp->plane_fmt[i].bytesperline; u32 min_si, max_si; u32 si = pix_mp->plane_fmt[i].sizeimage; + u64 di; bpl = clamp(bpl, min_bpl, max_bpl); pix_mp->plane_fmt[i].bytesperline = bpl; - min_si = (bpl * pix_mp->height * fmt->depth[i]) / - fmt->row_depth[i]; - max_si = (bpl * s.max_height * fmt->depth[i]) / - fmt->row_depth[i]; + di = (u64)bpl * pix_mp->height * fmt->depth[i]; + min_si = (u32)div_u64(di, fmt->row_depth[i]); + di = (u64)bpl * s.max_height * fmt->depth[i]; + max_si = (u32)div_u64(di, fmt->row_depth[i]); si = clamp(si, min_si, max_si); pix_mp->plane_fmt[i].sizeimage = si; -- 2.18.0