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Fri, 7 Nov 2025 11:45:28 -0800 Date: Fri, 7 Nov 2025 11:45:27 -0800 From: Nicolin Chen To: Ryan Huang CC: Will Deacon , Robin Murphy , "Joerg Roedel" , Jason Gunthorpe , Pranjal Shrivastava , Kevin Tian , Lu Baolu , , , , Daniel Mentz Subject: Re: [PATCH] iommu/arm-smmu-v3: Fix error check in arm_smmu_alloc_cd_tables Message-ID: References: <20251107190917.2858684-1-tzukui@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20251107190917.2858684-1-tzukui@google.com> X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000E9DA:EE_|PH7PR12MB8796:EE_ X-MS-Office365-Filtering-Correlation-Id: 80a96d0a-3ccf-4645-157d-08de1e36403e X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|36860700013|7416014|376014|1800799024|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?NP9GRzYDg46D29cHlzKXvzDXuKDpWp+6Z2GhxZjO/XrnqtdXjP7wLB6Jfpw0?= =?us-ascii?Q?fxUg7aRbX8Oi1mthAnnU3OglkIl6wWHWS8+7aThJsTwrjeo77q8c0CwrHeJb?= =?us-ascii?Q?MpcPYk26JO2g8gKQAV7f0XaFncW+5xK0a/qjgxFlwCqRPvQNMul99XkWeyJr?= =?us-ascii?Q?FvQV0Ct7RXxY+VPyoL38JZN5QXc5kq+h9qc2l68BZDo0LYafhcV6fZ60RLW2?= =?us-ascii?Q?NtANo3TQDKPgFfRVUrk8BZgg1vdmdqA8ij2BRymO74JeSDM/0rgwnBlmhBvD?= =?us-ascii?Q?+GDDy0qzYiW7gS+N0pYWD9bjX06VuxqDqfPoeU5c/HKp9vJ44MT9VRBad0Lt?= =?us-ascii?Q?svt1aCsiaBJDl0krEQ5439IjZXSk+4cgaZAJ6OWtb+LAZfzsnKCi8uZj9lTo?= =?us-ascii?Q?5PgiojfwuEjATU8CNA6RwZ1sWZCrDWaRUFDW/jjOQiQpsKwxR9AW/HYl2VVf?= =?us-ascii?Q?CatRrDGSvOzC4PZhxAf6deo5q7Z/yzgDrdU2p177Mxw0L5PQJXx4MNl/e3Ua?= =?us-ascii?Q?qtXA4/rsIL3HZsBIs7wJxpWjOyqzCfFt4K3YyJ/L/yrPFP0EBJ34QQtZVdQU?= =?us-ascii?Q?PaOqEPU6OHGaAukshnUxl8sWSe0smQ18kPGWZ2YP3SS4YOSeqq+eBd9/dl+m?= =?us-ascii?Q?TArHHlyHp0klg5g+mPZkgoewSaXlzw347pSq2YGfrRiR27r+nujH79gwkMQt?= =?us-ascii?Q?65oI280qRQ3+1MJTBoEfFZDHj7Kn5m0lJ8NqCNvULYLyjb6uevLPOrwQWEhB?= =?us-ascii?Q?bOMFPQW1bBSCUcqi9VP9YEpvamczJ/X5gqgYU6/85ddd+vNUqBqG2Ls8+cGQ?= =?us-ascii?Q?6jqTgnkx9ORtFfRjw30l/nJaZgLeI6Fy46gAE5cn+uDjg099uEPbVZevA/dH?= =?us-ascii?Q?yywEarlSXRBTkmHzplxIPZbAYdCV8vDPmDBx3Z+0OwFfY2mZPB1tjYeRCcdU?= =?us-ascii?Q?T5fTyXGbhxPnpoycait1LsLZkx8MPFojgf+S7kDkvEmjgr+Hb/zO3Gddlkk5?= =?us-ascii?Q?+Ijs/UfRBUKVvjzniz3K4Sq7Y49gDeviFyfUUt8d/49MgNFeK983GMaJTrJz?= =?us-ascii?Q?2TvmuS3Sg8KcyaxYBGzXDnE0u4XM4SSnJzxfXnF9hDuVcs/gP7vV+ePGS/71?= =?us-ascii?Q?UTThoOm7QsKv+0vhvhyYtLLHW+VjLLUOQP2fc39F1Qk55Cm9MACpRkUD2nQv?= =?us-ascii?Q?UvK7Ta5caEu3Z05HtU005hTnrGj8aKY5aONXylqBrLZSp4ZVAP+hswiihYmF?= =?us-ascii?Q?ajxnHazgnePJMVWZTdBUa//cXOi+opeHblyXUGrDDHTZvzobUMpecjsB5AWl?= =?us-ascii?Q?OwDlUVIJHXidz92CFZc/Ih49rcVkhhd2+7ltjo5Ytkes6tnqy7bGbXMXvKi5?= =?us-ascii?Q?G0gvx+W10eLUkg9NhsxuzapWpjV5yicklLi3DfwwfewuTwJOWH4x0tlRHiHf?= =?us-ascii?Q?E/0Hym9f2/iRXAtKXhZN1bKLn/msvBPT57em8gRcEKVbiGCWdEFoEE3QSIwq?= =?us-ascii?Q?Gk0+RBBye8zJUNqiLMIcJ1/nIeWtoE3t75xYj45JKNNCyGlJBWYB8ZaOoal3?= =?us-ascii?Q?qcAWmaWjl8HMOTXYFmU=3D?= X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230040)(82310400026)(36860700013)(7416014)(376014)(1800799024)(7053199007);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Nov 2025 19:45:48.7072 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 80a96d0a-3ccf-4645-157d-08de1e36403e 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: CY4PEPF0000E9DA.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB8796 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251107_114557_568901_E311EBFA X-CRM114-Status: GOOD ( 10.42 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Nov 07, 2025 at 11:09:17AM -0800, Ryan Huang wrote: > In arm_smmu_alloc_cd_tables(), the error check following the > dma_alloc_coherent() for cd_table->l2.l1tab incorrectly tests > cd_table->l2.l2ptrs. > > This means an allocation failure for l1tab goes undetected, causing > the function to return 0 (success) erroneously. > > Correct the check to test cd_table->l2.l1tab. > > Fixes: e3b1be2e73db ("iommu/arm-smmu-v3: Reorganize struct arm_smmu_ctx_desc_cfg") > Signed-off-by: Daniel Mentz > Signed-off-by: Ryan Huang Reviewed-by: Nicolin Chen