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Tue, 11 Nov 2025 10:53:59 -0800 Date: Tue, 11 Nov 2025 10:53:58 -0800 From: Nicolin Chen To: "Gustavo A. R. Silva" CC: Jason Gunthorpe , Kevin Tian , "Joerg Roedel" , Will Deacon , Robin Murphy , Lu Baolu , , , Subject: Re: [PATCH] iommufd/driver: Fix counter initialization for counted_by annotation 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: BN2PEPF000055DF:EE_|DS7PR12MB5790:EE_ X-MS-Office365-Filtering-Correlation-Id: 1a90ac4c-1e84-43b7-b6f5-08de2153b0b8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|1800799024|82310400026|7416014|376014|7053199007; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?SmDdHWU158h8/NGlPNDHQrlXZZfWO8rn2YdmCTOR17ZKtpD2m/7DFldKHaDN?= =?us-ascii?Q?UAxrS+6LmcQWTHuIslTWVC0pY2UQ9oYuVUiew75GVdwTFsfjhqfE8wcpKUQI?= =?us-ascii?Q?zpSwCLZH4gLGoVFCxFSPmx05YQE7DMLab5KTgKKFnF1Ptr1XKp2aZyK7ohrO?= =?us-ascii?Q?fIXEapN5pArcsAMq9dzyF34/7FvbwTdc3QORqDadderZ3a24AEvHiYdemDl8?= =?us-ascii?Q?pisyg0T+GmxVnSS6gbysCOy1dRpG9xBfqLGGjdnfZGN8HYE7BxjgUHQweKNe?= =?us-ascii?Q?bBF8m1ff/+bunVe9a349L03EME3WJYQ8ZTc19y13hgRjBHHhU/hE2qnZgFYP?= =?us-ascii?Q?gu54evDvIwm7Udpnh3kNB14iKs4QN5z7bdh3IwfVmVNcu0U0UFUC50CiL7dY?= =?us-ascii?Q?BdnLWk7Tpf9AfSitKjn8CPQim9X5NYWvhoS9kZ+gXuluw8RhrhkGJkYWAP6d?= =?us-ascii?Q?yoLAK6DG8qRmdr36ys760z90O9TBZWPLIsKku9HcVEii1j8MJG2WqwCufgUc?= =?us-ascii?Q?779anYrIdBIzPxJHSGSECWuV56kXOFyDdSAXpyziHsD7jUnFSftlpbkWVLdW?= =?us-ascii?Q?s9Wux445Ul+z3GkTUrz3D3d62wHkwLvqcboBovBugTPfXxvekjb9RerqMLoR?= =?us-ascii?Q?WcOigg7KxUg7m5BGhjMAk7fQdLf3lopTa5lHRUq4tFOMtSEHSkD7zlo8l2kI?= =?us-ascii?Q?Sfmypsgw6CTzPjKdmpusS4M2etjid/KZNO6TtebVcOiykDr0Rk+S5jN0CreK?= =?us-ascii?Q?svcTV5XEGWiUkDxy0p3SI195l79D/N/Wng50wCgEQTUJDkOma6qBCmuEQj2k?= =?us-ascii?Q?DL4PTwn9NivFWnEWBYHoHm6nZ4lGKZF+svmRV18oB9x7CIC+SZYFLso8jffJ?= =?us-ascii?Q?JmRyS4wJMNBdiILfZwLEVc5BcZ5ZAkyCTLLHTtEdX12M/8qJQ2Ns2jsE50B2?= =?us-ascii?Q?4eTtYxqZ+4FAfpWNYLDi3BYY0Ap9WrzAsqnW9qPvHh9RtXZuTphHS9HSGnav?= =?us-ascii?Q?Qt8o5ZXiuOyaVPzjrvrDlzm4gw4lKg1iHo4ehkL/AnO0SvQyj1JEsJe8kADy?= =?us-ascii?Q?bcxPGHFlBAxZjeBeRVWaw2SGnisODhqcprnyqOV5H+GOjrHt9r82CpdJxZML?= =?us-ascii?Q?oZ9y58ki6Ej6YIyGx/JEeMrngTuusP2Nn6eZMZeVbSJNf+YlqaAjGlqG9+Tb?= =?us-ascii?Q?WIh9heZeMlTfCg+VeJHcETtptUBcUpbiQC9HDlurt6gUFC+wB0jIpxGcddUs?= =?us-ascii?Q?/KJvPpRhtWc6NM5wbH9a4eL8M61DdSFpWHtifk0c8OGtjJgiuKb1ozK1C7Et?= =?us-ascii?Q?7cOG6n0xhrWzgNkDmTqMsm9T7foq0y1Adu9riYIZsnACqbUAfKQ0OVCYV7po?= =?us-ascii?Q?cPOzyt19NN9tlW768gh37bs+lt0blrJvIbg4y7h0NWvK7rUHmZUCCVfSh4Fr?= =?us-ascii?Q?VIDECSHjKsDnxvF+GAwWr11UdMyY8fcUyXT085QQNKT27ZHylqM8JbbPPzyS?= =?us-ascii?Q?HlglhGb+5WZoquSil9sxmZEo5lFkV33qmcqsphEG/Fzrp5IooLJE5UPFQqRe?= =?us-ascii?Q?NTC3qJ/gd2HvxHHL3eQ=3D?= 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)(36860700013)(1800799024)(82310400026)(7416014)(376014)(7053199007);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Nov 2025 18:54:06.2369 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1a90ac4c-1e84-43b7-b6f5-08de2153b0b8 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: BN2PEPF000055DF.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB5790 On Tue, Nov 11, 2025 at 06:01:24PM +0900, Gustavo A. R. Silva wrote: > One of the requirements for counted_by annotations is that the counter > member must be initialized before the first reference to the > flexible-array member. > > Move the vevent->data_len = data_len; initialization to before the > first access to flexible array vevent->event_data. > > Cc: stable@vger.kernel.org > Fixes: e8e1ef9b77a7 ("iommufd/viommu: Add iommufd_viommu_report_event helper") > Signed-off-by: Gustavo A. R. Silva Reviewed-by: Nicolin Chen