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Shenoy" To: Mario Limonciello , "Rafael J . Wysocki" , Viresh Kumar , K Prateek Nayak CC: , , "Gautham R. Shenoy" , Mario Limonciello Subject: [PATCH v4 01/12] amd-pstate: Fix memory leak in amd_pstate_epp_cpu_init() Date: Thu, 26 Mar 2026 17:17:45 +0530 Message-ID: <20260326114756.20374-2-gautham.shenoy@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260326114756.20374-1-gautham.shenoy@amd.com> References: <20260326114756.20374-1-gautham.shenoy@amd.com> 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-ClientProxiedBy: satlexmb07.amd.com (10.181.42.216) To satlexmb07.amd.com (10.181.42.216) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS3PEPF000099DF:EE_|SJ0PR12MB6711:EE_ X-MS-Office365-Filtering-Correlation-Id: 64425196-1fa7-4825-fc83-08de8b2d93ea X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|82310400026|1800799024|376014|18002099003|22082099003|56012099003|13003099007; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:satlexmb07.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(36860700016)(82310400026)(1800799024)(376014)(18002099003)(22082099003)(56012099003)(13003099007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: vkmPseAYN0KfLhP+rcVcVd1Ukv0jJaamDpr+DVCG4HxTMGF7nO3oFJ6V0mgJ0INn51YGacasnTO/ljiRqiw2X5BGtLtT/my0IT9sW9Gb+ctWH1kqRVnDCLDsiG24DQRh2LpvYibBSx5vhIhRF0aZLluqD5IgA0j7gnk0Y8QERemh/1Ws9/HsY57Iv0NGPdWvNku7IvFFlmDWvcMqRxbpacDr0i5ypV1wqGb0/oAPbW4NfSGQyzwsmahndXzpgUuZQmP4KlqwneJzD+wy14fpaaauV1hVjgYCM+rTGmR6/7HFSBkm137U8xZ6fbkNyXttX9SM0Y+7zL/qRVwoB8noo4SmJvqp+AaL/gseGDE1jmQnyt0ldnNdwjFt3b5Jg3iAPhk3X1bndZbY7fxWjJ/TvsCyz6YLAKv+ur5/sh5Tvqh+0Sq1uDOnYIvLsVKZF1pL X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 26 Mar 2026 11:48:20.4057 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 64425196-1fa7-4825-fc83-08de8b2d93ea X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: DS3PEPF000099DF.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB6711 Content-Type: text/plain; charset="utf-8" On failure to set the epp, the function amd_pstate_epp_cpu_init() returns with an error code without freeing the cpudata object that was allocated at the beginning of the function. Ensure that the cpudata object is freed before returning from the function. This memory leak was discovered by Claude Opus 4.6 with the aid of Chris Mason's AI review-prompts (https://github.com/masoncl/review-prompts/tree/main/kernel). Assisted-by: Claude:claude-opus-4.6 review-prompts/linux Fixes: f9a378ff6443 ("cpufreq/amd-pstate: Set different default EPP policy = for Epyc and Ryzen") Reviewed-by: Mario Limonciello (AMD) Signed-off-by: Gautham R. Shenoy --- drivers/cpufreq/amd-pstate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/cpufreq/amd-pstate.c b/drivers/cpufreq/amd-pstate.c index 5aa9fcd80cf5..d57969c72c9d 100644 --- a/drivers/cpufreq/amd-pstate.c +++ b/drivers/cpufreq/amd-pstate.c @@ -1533,7 +1533,7 @@ static int amd_pstate_epp_cpu_init(struct cpufreq_pol= icy *policy) =20 ret =3D amd_pstate_set_epp(policy, cpudata->epp_default); if (ret) - return ret; + goto free_cpudata1; =20 current_pstate_driver->adjust_perf =3D NULL; =20 --=20 2.34.1