From nobody Sat Sep 21 00:00:54 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 5959DC76195 for ; Tue, 28 Mar 2023 10:10:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232385AbjC1KKf (ORCPT ); Tue, 28 Mar 2023 06:10:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39324 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232868AbjC1KKW (ORCPT ); Tue, 28 Mar 2023 06:10:22 -0400 Received: from mail-yw1-x1135.google.com (mail-yw1-x1135.google.com [IPv6:2607:f8b0:4864:20::1135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 88A4E35B6; Tue, 28 Mar 2023 03:10:00 -0700 (PDT) Received: by mail-yw1-x1135.google.com with SMTP id 00721157ae682-544787916d9so219553797b3.13; Tue, 28 Mar 2023 03:10:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1679998198; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=vSN9UmMWW8LKANBpEhn1gTCwWjUOTgkE62IMKkjwCg0=; b=VKawVm2n11k73FEhif7iJNjBvNdUJqFH/tZb8L3hni41QNgUr986enklitCdxEr1H9 aglfr6ut9ISDMsImSU08X7AM/5JLuloPNB8dEZdJmILvc5I72/Wxyi7Svsewu//vqRRr YaxARdrzpkaVjdHRaOAysmfO8Z8u0b6pSbndKxfrbgIRbaO3OpuaQsneMGE7Bky/iHY3 8aPKg/cDmgN/Ekctjkg9R8E8VAvTalNt7rtTqexMepUA/NTbg5xD0JJ9Sgu8ppbcWC2w 7X6F7RGsmKlPec4O66T7QZeyivKqb0ScNt6J1gl+rwhz0Gv3nIQ4qDDjgyfUjwEm1OM2 y7Rw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1679998198; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=vSN9UmMWW8LKANBpEhn1gTCwWjUOTgkE62IMKkjwCg0=; b=WAyqhQdmGLxC5hUHpjlUMfJWjOKP6gRtwY7S6OegEaDOwF2SIQtZDRqGhGorPu+hi5 thOpTcFkk7fFcad4z9Xw4XznrMqPCeyzpdSEsI88SAn4Rq2KnwCB4m1m4+ffcDx52sSb 3Xcfd2eS7WCHh1Gv8f+D4Xi1s0nTD2Roxa1iYxN4ebdf4yKWz/ejXP2KJEqU+aDAlEkD ggctRulL5gFneuYYaL5TiKr66dZKURzILXOk7LdHiuGY02sSbuNT1/HS24hJlqVVYjqM dHDxhxgYFItBVlpMyhfxK85Ldbo98gAIJgj50fLgeaWEwPFS0CJUQMDltHxqRtsJJk6g NT+w== X-Gm-Message-State: AAQBX9cvQK5Bj0WrcIAmmD0G12XgcEshTC4JemOFGbFZZ05jXDMf1SIY 4K3mnXLOFvIIKFfPXUipMgw= X-Google-Smtp-Source: AKy350YWB4pruYmWkJDXlOTgbL/NI+go42y4drnV22+3AcxHJlRDgpq7qrITFtJgvL+E/d34H2rk2A== X-Received: by 2002:a0d:e803:0:b0:541:826c:2101 with SMTP id r3-20020a0de803000000b00541826c2101mr15910680ywe.12.1679998198233; Tue, 28 Mar 2023 03:09:58 -0700 (PDT) Received: from chcpu13.cse.ust.hk (191host119.mobilenet.cse.ust.hk. [143.89.191.119]) by smtp.gmail.com with ESMTPSA id cp27-20020a05690c0e1b00b00545a08184aasm2339676ywb.58.2023.03.28.03.09.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Mar 2023 03:09:57 -0700 (PDT) From: Wei Chen To: tiffany.lin@mediatek.com Cc: andrew-ct.chen@mediatek.com, yunfei.dong@mediatek.com, mchehab@kernel.org, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Wei Chen Subject: [PATCH] media: mediatek: vcodec: Fix potential array out-of-bounds in decoder queue_setup Date: Tue, 28 Mar 2023 10:09:51 +0000 Message-Id: <20230328100951.536955-1-harperchen1110@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" variable *nplanes is provided by user via system call argument. The possible value of q_data->fmt->num_planes is 1-3, while the value of *nplanes can be 1-8. The array access by index i can cause array out-of-bounds. Fix this bug by checking *nplanes against the array size. Signed-off-by: Wei Chen --- drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c b/driv= ers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c index 641f533c417f..cae34cc7c807 100644 --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c @@ -753,6 +753,13 @@ int vb2ops_vdec_queue_setup(struct vb2_queue *vq, unsi= gned int *nbuffers, } =20 if (*nplanes) { + if (vq->type =3D=3D V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) + if (*nplanes !=3D q_data->fmt->num_planes) + return -EINVAL; + else + if (*nplanes !=3D 1) + return -EINVAL; + for (i =3D 0; i < *nplanes; i++) { if (sizes[i] < q_data->sizeimage[i]) return -EINVAL; --=20 2.25.1