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-rw-r--r--drivers/acpi/acpica/nsxfeval.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/nsxfeval.c b/drivers/acpi/acpica/nsxfeval.c
index b38b4b07f86e..481a6b4a9b2f 100644
--- a/drivers/acpi/acpica/nsxfeval.c
+++ b/drivers/acpi/acpica/nsxfeval.c
@@ -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: