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Mon, 10 Aug 2020 09:36:52 +0000 Subject: Re: [PATCH] drm: amdgpu: Use the correct size when allocating memory To: Christophe JAILLET , alexander.deucher@amd.com, airlied@linux.ie, daniel@ffwll.ch, sumit.semwal@linaro.org, colton.w.lewis@protonmail.com, Ori.Messinger@amd.com, m.szyprowski@samsung.com, bernard@vivo.com, dri-devel@lists.freedesktop.org Cc: amd-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org References: <20200809203406.751971-1-christophe.jaillet@wanadoo.fr> From: =?UTF-8?Q?Christian_K=c3=b6nig?= Message-ID: Date: Mon, 10 Aug 2020 11:36:45 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 In-Reply-To: <20200809203406.751971-1-christophe.jaillet@wanadoo.fr> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US X-ClientProxiedBy: AM0PR02CA0090.eurprd02.prod.outlook.com (2603:10a6:208:154::31) To MN2PR12MB3775.namprd12.prod.outlook.com (2603:10b6:208:159::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [IPv6:2a02:908:1252:fb60:be8a:bd56:1f94:86e7] (2a02:908:1252:fb60:be8a:bd56:1f94:86e7) by AM0PR02CA0090.eurprd02.prod.outlook.com (2603:10a6:208:154::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3261.19 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4cd87d2f-9555-4f28-3839-08d83d10e998 X-MS-Exchange-CrossTenant-AuthSource: MN2PR12MB3775.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Aug 2020 09:36:52.6450 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: QQ5gNwpVLpdGVVz4iOBVFIISTjW4G8gQgalYh/ztu+qHabuWFejfvkWK4gCCF60e X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB4206 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am 09.08.20 um 22:34 schrieb Christophe JAILLET: > When '*sgt' is allocated, we must allocated 'sizeof(**sgt)' bytes instead > of 'sizeof(*sg)'. 'sg' (i.e. struct scatterlist) is smaller than > 'sgt' (i.e struct sg_table), so this could lead to memory corruption. > > Fixes: f44ffd677fb3 ("drm/amdgpu: add support for exporting VRAM using DMA-buf v3") > Signed-off-by: Christophe JAILLET Good catch, Reviewed-by: Christian König > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c > index 134cc36e30c5..0739e259bf91 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c > @@ -462,7 +462,7 @@ int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev, > unsigned int pages; > int i, r; > > - *sgt = kmalloc(sizeof(*sg), GFP_KERNEL); > + *sgt = kmalloc(sizeof(**sgt), GFP_KERNEL); > if (!*sgt) > return -ENOMEM; > From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?Q?Christian_K=c3=b6nig?= Date: Mon, 10 Aug 2020 09:36:45 +0000 Subject: Re: [PATCH] drm: amdgpu: Use the correct size when allocating memory Message-Id: List-Id: References: <20200809203406.751971-1-christophe.jaillet@wanadoo.fr> In-Reply-To: <20200809203406.751971-1-christophe.jaillet@wanadoo.fr> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: Christophe JAILLET , alexander.deucher@amd.com, airlied@linux.ie, daniel@ffwll.ch, sumit.semwal@linaro.org, colton.w.lewis@protonmail.com, Ori.Messinger@amd.com, m.szyprowski@samsung.com, bernard@vivo.com, dri-devel@lists.freedesktop.org Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org Am 09.08.20 um 22:34 schrieb Christophe JAILLET: > When '*sgt' is allocated, we must allocated 'sizeof(**sgt)' bytes instead > of 'sizeof(*sg)'. 'sg' (i.e. struct scatterlist) is smaller than > 'sgt' (i.e struct sg_table), so this could lead to memory corruption. > > Fixes: f44ffd677fb3 ("drm/amdgpu: add support for exporting VRAM using DM= A-buf v3") > Signed-off-by: Christophe JAILLET Good catch, Reviewed-by: Christian K=C3=B6nig > --- > drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/d= rm/amd/amdgpu/amdgpu_vram_mgr.c > index 134cc36e30c5..0739e259bf91 100644 > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c > @@ -462,7 +462,7 @@ int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *a= dev, > unsigned int pages; > int i, r; > =20 > - *sgt =3D kmalloc(sizeof(*sg), GFP_KERNEL); > + *sgt =3D kmalloc(sizeof(**sgt), GFP_KERNEL); > if (!*sgt) > return -ENOMEM; > =20 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=-11.3 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, MSGID_FROM_MTA_HEADER,NICE_REPLY_A,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 58721C433DF for ; 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Mon, 10 Aug 2020 09:36:52 +0000 Subject: Re: [PATCH] drm: amdgpu: Use the correct size when allocating memory To: Christophe JAILLET , alexander.deucher@amd.com, airlied@linux.ie, daniel@ffwll.ch, sumit.semwal@linaro.org, colton.w.lewis@protonmail.com, Ori.Messinger@amd.com, m.szyprowski@samsung.com, bernard@vivo.com, dri-devel@lists.freedesktop.org References: <20200809203406.751971-1-christophe.jaillet@wanadoo.fr> From: =?UTF-8?Q?Christian_K=c3=b6nig?= Message-ID: Date: Mon, 10 Aug 2020 11:36:45 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 In-Reply-To: <20200809203406.751971-1-christophe.jaillet@wanadoo.fr> Content-Language: en-US X-ClientProxiedBy: AM0PR02CA0090.eurprd02.prod.outlook.com (2603:10a6:208:154::31) To MN2PR12MB3775.namprd12.prod.outlook.com (2603:10b6:208:159::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [IPv6:2a02:908:1252:fb60:be8a:bd56:1f94:86e7] (2a02:908:1252:fb60:be8a:bd56:1f94:86e7) by AM0PR02CA0090.eurprd02.prod.outlook.com (2603:10a6:208:154::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3261.19 via Frontend Transport; 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Mon, 10 Aug 2020 09:36:52 +0000 Subject: Re: [PATCH] drm: amdgpu: Use the correct size when allocating memory To: Christophe JAILLET , alexander.deucher@amd.com, airlied@linux.ie, daniel@ffwll.ch, sumit.semwal@linaro.org, colton.w.lewis@protonmail.com, Ori.Messinger@amd.com, m.szyprowski@samsung.com, bernard@vivo.com, dri-devel@lists.freedesktop.org References: <20200809203406.751971-1-christophe.jaillet@wanadoo.fr> From: =?UTF-8?Q?Christian_K=c3=b6nig?= Message-ID: Date: Mon, 10 Aug 2020 11:36:45 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 In-Reply-To: <20200809203406.751971-1-christophe.jaillet@wanadoo.fr> Content-Language: en-US X-ClientProxiedBy: AM0PR02CA0090.eurprd02.prod.outlook.com (2603:10a6:208:154::31) To MN2PR12MB3775.namprd12.prod.outlook.com (2603:10b6:208:159::19) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from [IPv6:2a02:908:1252:fb60:be8a:bd56:1f94:86e7] (2a02:908:1252:fb60:be8a:bd56:1f94:86e7) by AM0PR02CA0090.eurprd02.prod.outlook.com (2603:10a6:208:154::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3261.19 via Frontend Transport; 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