From nobody Sat Sep 21 00:05:52 2024 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 9C9D8C77B6F for ; Tue, 11 Apr 2023 05:54:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229928AbjDKFyc (ORCPT ); Tue, 11 Apr 2023 01:54:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38064 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229640AbjDKFya (ORCPT ); Tue, 11 Apr 2023 01:54:30 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E621CE6A; Mon, 10 Apr 2023 22:54:22 -0700 (PDT) X-UUID: 4bdcb97ed82d11edb6b9f13eb10bd0fe-20230411 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=hlzUNXvIMOQc13xK9X1uYOOly8rXvrRJ86fD7YnDQ/U=; b=Sg1Bfe8zvipETD43TMa8G9cAc0DlLJyY3dihZkmO8efWTESUiqQCDYD36MIZ9XhyZD6I+kK16feJpBIHHRlpYkueSJRl6BR0L5zzSNrn1MtaFJQLd3BNewIMNRbcUb+8u4IZMPvN70nBMxmlBTg6Yp4QrUzkGIXA5Ijuu2uMZzI=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.22,REQID:37fdfbfb-d691-4357-9921-2041b2a9c00f,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:120426c,CLOUDID:fe30a683-cd9c-45f5-8134-710979e3df0e,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-UUID: 4bdcb97ed82d11edb6b9f13eb10bd0fe-20230411 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 120522778; Tue, 11 Apr 2023 13:54:17 +0800 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.25; Tue, 11 Apr 2023 13:54:16 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.25 via Frontend Transport; Tue, 11 Apr 2023 13:54:15 +0800 From: Irui Wang To: Hans Verkuil , Mauro Carvalho Chehab , Matthias Brugger CC: , , , , , , Yunfei Dong , Irui Wang Subject: [PATCH v2, 1/2] media: mediatek: vcodec: make sure array index is in valid range Date: Tue, 11 Apr 2023 13:54:12 +0800 Message-ID: <20230411055413.539-2-irui.wang@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230411055413.539-1-irui.wang@mediatek.com> References: <20230411055413.539-1-irui.wang@mediatek.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" CERT-C Characters and Strings: dev->reg_base[dev->venc_pdata->core_id] evaluates to an address that could be at negative offset of an array, check core id is in valid range. Signed-off-by: Irui Wang Reviewed-by: Alexandre Mergnat --- .../mediatek/vcodec/mtk_vcodec_enc_drv.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_drv.c b/= drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_drv.c index 9095186d5495..125d5722d07b 100644 --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_drv.c +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_enc_drv.c @@ -89,16 +89,24 @@ static irqreturn_t mtk_vcodec_enc_irq_handler(int irq, = void *priv) struct mtk_vcodec_ctx *ctx; unsigned long flags; void __iomem *addr; + int core_id; =20 spin_lock_irqsave(&dev->irqlock, flags); ctx =3D dev->curr_ctx; spin_unlock_irqrestore(&dev->irqlock, flags); =20 - mtk_v4l2_debug(1, "id=3D%d coreid:%d", ctx->id, dev->venc_pdata->core_id); - addr =3D dev->reg_base[dev->venc_pdata->core_id] + - MTK_VENC_IRQ_ACK_OFFSET; + core_id =3D dev->venc_pdata->core_id; + if (core_id < 0 || core_id >=3D NUM_MAX_VCODEC_REG_BASE) { + mtk_v4l2_err("Invalid core id: %d, ctx id: %d", + core_id, ctx->id); + return IRQ_HANDLED; + } + + mtk_v4l2_debug(1, "id: %d, core id: %d", ctx->id, core_id); + + addr =3D dev->reg_base[core_id] + MTK_VENC_IRQ_ACK_OFFSET; =20 - ctx->irq_status =3D readl(dev->reg_base[dev->venc_pdata->core_id] + + ctx->irq_status =3D readl(dev->reg_base[core_id] + (MTK_VENC_IRQ_STATUS_OFFSET)); =20 clean_irq_status(ctx->irq_status, addr); --=20 2.18.0