Commit d53d8207 authored Sep 23, 2013 by Bob Moore Committed by Rafael J. Wysocki Sep 24, 2013

ACPICA: Validate start object for acpi_walk_namespace.

Perform a sanity check on the start object to prevent problems
later. ACPICA BZ 1025.
This patch only adds additional input parameter validation, no actual
kernel suffering has been discovered.

Buglink: http://bugs.acpica.org/show_bug.cgi?id=1025


Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Reviewed-by: Len Brown <len.brown@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

parent 1f5210a1

drivers/acpi/acpica/nsxfeval.c

+8 −0

Original line number	Diff line number	Diff line
		@@ -605,11 +605,19 @@ acpi_walk_namespace(acpi_object_type type,
		goto unlock_and_exit;
		}

		/* Now we can validate the starting node */

		if (!acpi_ns_validate_handle(start_object)) {
		status = AE_BAD_PARAMETER;
		goto unlock_and_exit2;
		}

		status = acpi_ns_walk_namespace(type, start_object, max_depth,
		ACPI_NS_WALK_UNLOCK,
		descending_callback, ascending_callback,
		context, return_value);

		unlock_and_exit2:
		(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);

		unlock_and_exit: