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Wed, 17 Jun 2026 07:01:57 -0700 From: Tariq Toukan To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , , Paolo Abeni CC: Cosmin Ratiu , Eran Ben Elisha , Feng Liu , Haiyang Zhang , "Lama Kayal" , Leon Romanovsky , , , Mark Bloch , Nimrod Oren , Saeed Mahameed , Tariq Toukan Subject: [PATCH net V2 0/3] net/mlx5e: Fix crashes in dynamic per-channel stats and HV VHCA agent Date: Wed, 17 Jun 2026 17:01:24 +0300 Message-ID: <20260617140127.573117-1-tariqt@nvidia.com> X-Mailer: git-send-email 2.44.0 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ5PEPF00000204:EE_|SJ2PR12MB9086:EE_ X-MS-Office365-Filtering-Correlation-Id: b1b90407-6e93-4f2e-6e82-08decc79116e X-LD-Processed: 43083d15-7273-40c1-b7db-39efd9ccc17a,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|82310400026|23010399003|1800799024|376014|7416014|11063799006|56012099006|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge1.nvidia.com;CAT:NONE;SFS:(13230040)(36860700016)(82310400026)(23010399003)(1800799024)(376014)(7416014)(11063799006)(56012099006)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: XdAFAs9UzAYwLe8PJLScXEdIkZg7HgrT2WmphzIAq714Db/ENBRT541ZQV6IIqT7fLpvvt6PRW31DOw2OWeGnJKxY3IfveaN7FYUTHuUo0lDd+KIWBfCy9xKhWboBY1Mfk6/b4DeGFYjF4/Hu1I7ucfdq/YEG1DCbo2kuhDMSZpK7EwypV3/4J7SOEz5IGmqsqCJXrRNNLu4KZara3ArpX4ybtnOqaz7yWN3Siv0CWKEf3T+3O8WZuF/QVNJxLw/BCvwQU4O2QrR2En+BtPIMz8j7oShd3XL9ebWmRQKTN4jloqiq/wcx/ULAWmEt670nTSeMpo+3EWyRpHgDJDzbQ4pc1p1fQZJa2npFVDVxPo9vo4jitdqIHgzVe4+dEGPnYg5xZfde//HOl8hn8FBWLZXwTiHleB49S91t4fBG18qIUUbBqjYXoO0OU2JPhbN X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jun 2026 14:02:28.7316 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b1b90407-6e93-4f2e-6e82-08decc79116e X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ5PEPF00000204.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB9086 Hi, Since per-channel stats were converted to be allocated and published lazily at first channel open in commit fa691d0c9c08 ("net/mlx5e: Allocate per-channel stats dynamically at first usage"), priv->channel_stats[] and priv->stats_nch are filled in incrementally during interface bring-up. This opened a window in which the various stats readers - most of them reachable from userspace via netlink/netdev stats queries - can race with mlx5e_open_channel() on another CPU and observe partially initialized state. The HV VHCA stats agent, which is created before the channels are opened, hits related problems of its own. This series by Feng fixes the resulting crashes. Regards, Tariq V2: - Drop "Bounds-check stats_nch in mlx5e_get_queue_stats_rx()" (Jakub). V1: https://lore.kernel.org/all/20260604135041.455754-1-tariqt@nvidia.com Feng Liu (3): net/mlx5e: Fix HV VHCA stats zero-sized buffer allocation net/mlx5e: Fix HV VHCA stats agent registration race net/mlx5e: Fix publication race for priv->channel_stats[] drivers/net/ethernet/mellanox/mlx5/core/en.h | 12 ++++++ .../mellanox/mlx5/core/en/hv_vhca_stats.c | 38 +++++++++++++------ .../net/ethernet/mellanox/mlx5/core/en_main.c | 14 ++++--- .../ethernet/mellanox/mlx5/core/en_stats.c | 9 +++-- .../ethernet/mellanox/mlx5/core/ipoib/ipoib.c | 3 +- .../ethernet/mellanox/mlx5/core/lib/hv_vhca.c | 8 +++- .../ethernet/mellanox/mlx5/core/lib/hv_vhca.h | 6 ++- 7 files changed, 63 insertions(+), 27 deletions(-) base-commit: 406e8a651a7b854c41fecd5117bb282b3a6c2c6b -- 2.44.0