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Mon, 30 Sep 2024 08:10:58 -0700 From: David Thompson To: , , , , , CC: , , David Thompson Subject: [PATCH v1 RESEND] EDAC/bluefield - fix potential integer overflow Date: Mon, 30 Sep 2024 11:10:56 -0400 Message-ID: <20240930151056.10158-1-davthompson@nvidia.com> X-Mailer: git-send-email 2.30.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH1PEPF0000A346:EE_|MN2PR12MB4158:EE_ X-MS-Office365-Filtering-Correlation-Id: d4cad371-0d7e-496a-4c51-08dce1621cad X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|376014|36860700013|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?aKTxxH3WWqYkcU0nQqNHnU7ZQwHpFzilzHHpDj9xSZ2ANsBWA+bbNGcu3sWD?= =?us-ascii?Q?LPcly2xeZ7KJ6hHyR1fiuR2ayNG03ENxGlPG2H2TAX6tqkGvLkKNjPeztR3s?= =?us-ascii?Q?eJbvSLmIvHxOHXEVTv9MUi7fZldHJuhwYWkY+uWS6F2qOdwXHYsVFjo8hLVB?= =?us-ascii?Q?SZVSDmA7XlTytJBYJbqzvIpPX0HDb/8OiELV+ZV0sV8FJCKvzaAnTwEGHZ/F?= =?us-ascii?Q?KsYd65ZZoNxt6LYVIOCVhBDD8stP7rEZL0I50M4dTS/ll/vyiFbj+PWZY3Yc?= =?us-ascii?Q?2ueYVD8dMA9okhIZT6Y+dWcTwN7GItRPCSTr7JaIvJeX8bq+/MZ+ZPqZfc1n?= =?us-ascii?Q?yv+rRBZRbatUeb65Si7zwc9DbBNI8RDisRjQv3KqMDWojB2tOTBg+h+1Xoww?= =?us-ascii?Q?4TYGmjTeQPPh/PIbimft+PplvkmpGG4aF+Zkc506pyCI+OxKT09+yC56906I?= =?us-ascii?Q?jR+lkX9Or63qu52F6NG2O5SWN8sH9sYrLiSu+AYfJgbQVva4YZnwyLdL/8qF?= =?us-ascii?Q?w1Q+BIvApZyLmmM6MXtGz8sWWKO0y/QvAY1Um0fO8GXNJs0HPdnRBzsVXbK1?= =?us-ascii?Q?HJLUbjypXaD0MQkgkkrYanRABv38iKCYJeEiPUX1qXkDgJuanWZY+BFt474i?= =?us-ascii?Q?UBvUGG5OoCQnbVYA88yESCb3xSzLmdpAgHINbz7HrOZ1cDUBB6k79oeNWp56?= =?us-ascii?Q?APGZt8a2VfJZC2W9xb5EDG8e5wOKXRZTff7ssspLYU4jzsh4+lCLfWjyNnQN?= =?us-ascii?Q?rcjv2Ti8tdddh6Trk4RQAU3d1lq+djeEHTX3wdZodcEMhI5eYxYHULrJfHn9?= =?us-ascii?Q?DvN1qs45bUm1I3engOF4gFocxwfRtDkGkigUtdmLsgiGXgg5p3bYZQxhGTj3?= =?us-ascii?Q?7svnCt7bViRuJnZ5FFq475nuHjrzvo5e+uIH1ThGTTUkTOJkE/BrU9i0sDkY?= =?us-ascii?Q?fmvRnAPRp1jKWqToCw14oSOgU/T+1dMB7RWaZIO+fP17QFoSVILZr4mWrfxt?= =?us-ascii?Q?NLwgDoiwLWH3NjXekAATjO9I7w1yUGQblAYKzbBx6jyg0cztHarv3U4aEAhE?= =?us-ascii?Q?KNM2QVPfzGZbHxTCliDRDrajN/i6rkxrII2M6dDaITWDaIqEfQOFB9zT28TF?= =?us-ascii?Q?sdZ8a8IAp77uJ+vWsz/1GvuJh3uQ7hD/utTYRgd0csXaYWYVcYSJiZrkDD08?= =?us-ascii?Q?GjKJOTGHHy1xECNpUMPQS0lv1tCgwQF/x3pTVvMfXixKA7Z9Mw2Q/4Wrt3zE?= =?us-ascii?Q?1ycetViSE8N9k57N/ifSLgpRkRMdHQfXtt+V5vdPC3j/Jvfg004VnbZVhign?= =?us-ascii?Q?fdYF9hKqW/v1YJw8R6auCk+J9GOZ84n+0UStOzK7TTJuE1aJjpB+bIbF+VZL?= =?us-ascii?Q?XgoPMQaT0GLSEdKxpR5b9e1jo0HdQBwx8oJU2PoK5ZgFr+/8xyASwEuWUNLU?= =?us-ascii?Q?yl3lgJeYAgLLO/veJQC8Vnx1O9EQK2l1?= 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)(82310400026)(376014)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Sep 2024 15:11:08.2369 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d4cad371-0d7e-496a-4c51-08dce1621cad 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: CH1PEPF0000A346.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MN2PR12MB4158 Content-Type: text/plain; charset="utf-8" The 64-bit argument for the "get DIMM info" SMC call consists of "mem_ctrl_idx" left-shifted 16 bits and OR-ed with DIMM index. With "mem_ctrl_idx" defined as 32-bits wide the left-shift operation truncates the upper 16 bits of information during the calculation of the SMC argument. The "mem_ctrl_idx" stack variable must be defined as 64-bits wide to prevent any potential integer overflow, i.e. loss of data from upper 16 bits. Fixes: 82413e562ea6 ("EDAC, mellanox: Add ECC support for BlueField DDR4") Reviewed-by: Shravan Kumar Ramani Signed-off-by: David Thompson --- drivers/edac/bluefield_edac.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/edac/bluefield_edac.c b/drivers/edac/bluefield_edac.c index 5b3164560648..0e539c107351 100644 --- a/drivers/edac/bluefield_edac.c +++ b/drivers/edac/bluefield_edac.c @@ -180,7 +180,7 @@ static void bluefield_edac_check(struct mem_ctl_info *m= ci) static void bluefield_edac_init_dimms(struct mem_ctl_info *mci) { struct bluefield_edac_priv *priv =3D mci->pvt_info; - int mem_ctrl_idx =3D mci->mc_idx; + u64 mem_ctrl_idx =3D mci->mc_idx; struct dimm_info *dimm; u64 smc_info, smc_arg; int is_empty =3D 1, i; --=20 2.30.1