linux-kernel - [PATCH v2 1/7] ACPI: processor: idle: Mark the state as invalid if its entry method is illegal

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20251103084244.2654432-2-lihuisong@huawei.com>
Date: Mon, 3 Nov 2025 16:42:38 +0800
From: Huisong Li <lihuisong@...wei.com>
To: <rafael@...nel.org>, <lenb@...nel.org>
CC: <linux-acpi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<Sudeep.Holla@....com>, <linuxarm@...wei.com>, <jonathan.cameron@...wei.com>,
	<zhanjie9@...ilicon.com>, <zhenglifeng1@...wei.com>, <yubowen8@...wei.com>,
	<lihuisong@...wei.com>
Subject: [PATCH v2 1/7] ACPI: processor: idle: Mark the state as invalid if its entry method is illegal

According to ACPI spec, entry method in LPI sub-package must be buffer
or integer. And the entry method is very key in cpuidle. So mark the state
as invalid.

Fixes: a36a7fecfe60 ("ACPI / processor_idle: Add support for Low Power Idle(LPI) states")
Signed-off-by: Huisong Li <lihuisong@...wei.com>
---
 drivers/acpi/processor_idle.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 341825e8ac63..9f1040eac051 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -956,6 +956,9 @@ static int acpi_processor_evaluate_lpi(acpi_handle handle,
 			lpi_state->entry_method = ACPI_CSTATE_INTEGER;
 			lpi_state->address = obj->integer.value;
 		} else {
+			pr_debug("Entry method of state-%d is illegal, disable it.\n",
+				 state_idx);
+			lpi_state->flags = 0;
 			continue;
 		}
 
-- 
2.33.0