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CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge2.nvidia.com; CAT:NONE; SFS:(13230040)(1800799024)(82310400026)(36860700013)(376014)(7416014); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Oct 2024 07:32:26.6521 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6ceb2b4c-db22-45f6-7f90-08dce76b5bdb X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.118.233]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DS1PEPF0001709B.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB8404 X-Mailman-Approved-At: Tue, 08 Oct 2024 13:41:08 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Yonatan Maman When `nouveau_dmem_copy_one` is called, the following error occurs: [272146.675156] nouveau 0000:06:00.0: fifo: PBDMA9: 00000004 [HCE_PRIV] ch 1 00000300 00003386 This indicates that a copy push command triggered a Host Copy Engine Privileged error on channel 1 (Copy Engine channel). To address this issue, modify the Copy Engine channel to allow privileged push commands Fixes: 6de125383a5c ("drm/nouveau/fifo: expose runlist topology info on all chipsets") Signed-off-by: Yonatan Maman Signed-off-by: Gal Shalom Co-developed-by: Gal Shalom Reviewed-by: Ben Skeggs --- drivers/gpu/drm/nouveau/nouveau_drm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c index a58c31089613..0a75ce4c5021 100644 --- a/drivers/gpu/drm/nouveau/nouveau_drm.c +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c @@ -356,7 +356,7 @@ nouveau_accel_ce_init(struct nouveau_drm *drm) return; } - ret = nouveau_channel_new(drm, device, false, runm, NvDmaFB, NvDmaTT, &drm->cechan); + ret = nouveau_channel_new(drm, device, true, runm, NvDmaFB, NvDmaTT, &drm->cechan); if (ret) NV_ERROR(drm, "failed to create ce channel, %d\n", ret); } From patchwork Tue Oct 8 07:31:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yonatan Maman X-Patchwork-Id: 13826502 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3FD3DCEF177 for ; 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Tue, 8 Oct 2024 00:32:26 -0700 From: Yonatan Maman To: , , , , , , , , CC: Yonatan Maman , , , Gal Shalom Subject: [PATCH v3 2/2] nouveau/dmem: Fix vulnerability in migrate_to_ram upon copy error Date: Tue, 8 Oct 2024 10:31:03 +0300 Message-ID: <20241008073103.987926-3-ymaman@nvidia.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241008073103.987926-1-ymaman@nvidia.com> References: <20241008073103.987926-1-ymaman@nvidia.com> MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0001A0FA:EE_|BL1PR12MB5777:EE_ X-MS-Office365-Filtering-Correlation-Id: 75b2dba1-1006-4369-ceb6-08dce76b6385 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|376014|7416014|36860700013|1800799024|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.232; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge1.nvidia.com; CAT:NONE; SFS:(13230040)(376014)(7416014)(36860700013)(1800799024)(82310400026); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Oct 2024 07:32:39.5123 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 75b2dba1-1006-4369-ceb6-08dce76b6385 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.118.232]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF0001A0FA.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL1PR12MB5777 X-Mailman-Approved-At: Tue, 08 Oct 2024 13:41:08 +0000 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Yonatan Maman The `nouveau_dmem_copy_one` function ensures that the copy push command is sent to the device firmware but does not track whether it was executed successfully. In the case of a copy error (e.g., firmware or hardware failure), the copy push command will be sent via the firmware channel, and `nouveau_dmem_copy_one` will likely report success, leading to the `migrate_to_ram` function returning a dirty HIGH_USER page to the user. This can result in a security vulnerability, as a HIGH_USER page that may contain sensitive or corrupted data could be returned to the user. To prevent this vulnerability, we allocate a zero page. Thus, in case of an error, a non-dirty (zero) page will be returned to the user. Fixes: 5be73b690875 ("drm/nouveau/dmem: device memory helpers for SVM") Signed-off-by: Yonatan Maman Signed-off-by: Gal Shalom Co-developed-by: Gal Shalom Reviewed-by: Ben Skeggs Cc: stable@vger.kernel.org --- drivers/gpu/drm/nouveau/nouveau_dmem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/nouveau/nouveau_dmem.c b/drivers/gpu/drm/nouveau/nouveau_dmem.c index 6fb65b01d778..097bd3af0719 100644 --- a/drivers/gpu/drm/nouveau/nouveau_dmem.c +++ b/drivers/gpu/drm/nouveau/nouveau_dmem.c @@ -193,7 +193,7 @@ static vm_fault_t nouveau_dmem_migrate_to_ram(struct vm_fault *vmf) if (!spage || !(src & MIGRATE_PFN_MIGRATE)) goto done; - dpage = alloc_page_vma(GFP_HIGHUSER, vmf->vma, vmf->address); + dpage = alloc_page_vma(GFP_HIGHUSER | __GFP_ZERO, vmf->vma, vmf->address); if (!dpage) goto done;