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Wed, 18 Mar 2026 13:04:48 -0700 Date: Wed, 18 Mar 2026 13:04:46 -0700 From: Nicolin Chen To: "Tian, Kevin" CC: "will@kernel.org" , "robin.murphy@arm.com" , "joro@8bytes.org" , "bhelgaas@google.com" , "jgg@nvidia.com" , "rafael@kernel.org" , "lenb@kernel.org" , "praan@google.com" , "baolu.lu@linux.intel.com" , "xueshuai@linux.alibaba.com" , "linux-arm-kernel@lists.infradead.org" , "iommu@lists.linux.dev" , "linux-kernel@vger.kernel.org" , "linux-acpi@vger.kernel.org" , "linux-pci@vger.kernel.org" , Vikram Sethi Subject: Re: [PATCH v2 0/7] iommu/arm-smmu-v3: Quarantine device upon ATC invalidation timeout Message-ID: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM2PEPF00003FC8:EE_|BY5PR12MB4275:EE_ X-MS-Office365-Filtering-Correlation-Id: a4051207-c669-4da0-f276-08de8529a828 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|82310400026|376014|7416014|1800799024|22082099003|18002099003|56012099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: JClN7nPNlrPdvECuRnCietkcwBzm3Xq1zKt6flnoxvBS2GR6i9kVIJl+S49lvoSNgs4tAGorPD+0Zn7uHhzccYVpORYc53q5KsR+YYTlNf6/SUglrIzVGjz7bCV9uV6ZjXDOhfTXH/pqzXGH1bqte/0LkOu58lVFGGefnr8IxBS3fWB78OsIaxNNxkIkc/9MXBpVNijKzlKOwGI6B/MO8Rc74JVD5FoESK7L2HIRdELMwUKXREr/dLBdOE+oXGo9ozcCB7FGDJoYV0uarkrigTjy0P0CLbyqnDWs7Xmm4VZ/7J/OBGniDeByWor7ya5+J5jaRC1/9oHZlDmTrPJG2bWa8NFfcO257dOCkzslgqfx95FrHBbq5Pada3Q+QRDGripcGz8gdxzEy5Ocv6Nrj3dY3mqzw/qP5qNWCp+zGsaQXMFxMa58i/uHaKtjtEFA X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Mar 2026 20:05:09.3118 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: a4051207-c669-4da0-f276-08de8529a828 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DM2PEPF00003FC8.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BY5PR12MB4275 On Wed, Mar 18, 2026 at 07:47:18AM +0000, Tian, Kevin wrote: > > From: Nicolin Chen > > Sent: Wednesday, March 18, 2026 3:16 AM > > > > Hi all, > > > > This series addresses a critical vulnerability and stability issue where an > > unresponsive PCIe device failing to process ATC (Address Translation Cache) > > invalidation requests leads to silent data corruption and continuous SMMU > > CMDQ error spam. > > > > None of the patches in this series contains a Fixed tag and cc stable. Hmm, I guess AI overly polished the cover letter so it sounds too strong? This is essentially a vulnerability (potential memory corruption). And none of these patches actually fixes any regression. The PATCH 7 even requires the arm_smmu_invs series which has not been merged yet :-/ Nicolin