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

Rafael J. Wysocki
2025-09-12T20:06:28Z

From: Dmitry Antipov <dmantipov@yandex.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@yandex.ru>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.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