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Wysocki" CC: LKML , Andy Shevchenko , Mika Westerberg , Lorenzo Pieralisi , Hanjun Guo , Sudeep Holla , , Ard Biesheuvel , Ilias Apalodimas , , Will Deacon , Robin Murphy , "Joerg Roedel (AMD)" , Mark Pearson , "Derek J. Clark" , Hans de Goede , =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= , , "David Rhodes" , Richard Fitzgerald , Jaroslav Kysela , Takashi Iwai , , Shenghao Ding , Kevin Lu , Baojun Xu , Sen Wang , Vijendar Mukunda , Venkata Prasad Potturu , Liam Girdwood , "Mark Brown" , Peter Ujfalusi , Bard Liao , Kai Vehmanen , Pierre-Louis Bossart , Binbin Zhou , Andreas Noever , Mika Westerberg , Yehezkel Bernat , Linux ACPI References: <7995179.EvYhyI6sBW@rafael.j.wysocki> <15844908.tv2OnDr8pf@rafael.j.wysocki> Content-Language: en-US From: Cezary Rojewski In-Reply-To: <15844908.tv2OnDr8pf@rafael.j.wysocki> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: WA2PEPF000008B6.POLP291.PROD.OUTLOOK.COM (2603:10a6:1d8::689) To PH7PR11MB6006.namprd11.prod.outlook.com (2603:10b6:510:1e1::13) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH7PR11MB6006:EE_|PH8PR11MB9856:EE_ X-MS-Office365-Filtering-Correlation-Id: 00a02361-d465-46b6-bba4-08df187fd0b5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|7416014|23010399003|376014|11063799006|56012099006|4143699003|10067099003|18002099003|22082099003; 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Wysocki wrote: > From: "Rafael J. Wysocki" > > Replace acpi_get_first_physical_node() that is slated for removal > with acpi_bus_get_primary_device() that takes a reference to the > device it is about to return. > > This addresses a potential use-after-free that may occur if the > device returned by acpi_get_first_physical_node() is removed right > after dropping its ACPI companion's physical_node_lock in that > function. > > Signed-off-by: Rafael J. Wysocki Acked-by: Cezary Rojewski