linux-kernel - [PATCH v1 13/16] ACPICA: Fix largest possible resource descriptor index

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Message-ID: <878863953.0ifERbkFSE@rafael.j.wysocki>
Date: Fri, 12 Sep 2025 22:03:16 +0200
From: "Rafael J. Wysocki" <rafael@...nel.org>
To: Linux ACPI <linux-acpi@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
 "Dumbre, Saket" <saket.dumbre@...el.com>
Subject:
 [PATCH v1 13/16] ACPICA: Fix largest possible resource descriptor index

From: Dmitry Antipov <dmantipov@...dex.ru>

ACPI_RESOURCE_NAME_LARGE_MAX should be equal to the last actually
used resource descriptor index (ACPI_RESOURCE_NAME_CLOCK_INPUT).

Otherwise 'resource_index' in 'acpi_ut_validate_resource()' may be
clamped incorrectly and resulting value may issue an out-of-bounds
access for 'acpi_gbl_resource_types' array. Compile tested only.

Fixes: 520d4a0ee5b6 ("ACPICA: add support for ClockInput resource (v6.5)")
Link: https://github.com/acpica/acpica/commit/cf00116c
Link: https://marc.info/?l=linux-acpi&m=175449676131260&w=2
Signed-off-by: Dmitry Antipov <dmantipov@...dex.ru>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 drivers/acpi/acpica/aclocal.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index 0c41f0097e8d..f98640086f4e 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -1141,7 +1141,7 @@ struct acpi_port_info {
 #define ACPI_RESOURCE_NAME_PIN_GROUP_FUNCTION   0x91
 #define ACPI_RESOURCE_NAME_PIN_GROUP_CONFIG     0x92
 #define ACPI_RESOURCE_NAME_CLOCK_INPUT          0x93
-#define ACPI_RESOURCE_NAME_LARGE_MAX            0x94
+#define ACPI_RESOURCE_NAME_LARGE_MAX            0x93

 /*****************************************************************************
  *
-- 
2.51.0