1 files changed, 9 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/components/namespace/nsxfeval.c b/sys/contrib/dev/acpica/components/namespace/nsxfeval.c
index 2ec6418..984ee64 100644
--- a/sys/contrib/dev/acpica/components/namespace/nsxfeval.c
+++ b/sys/contrib/dev/acpica/components/namespace/nsxfeval.c
@@ -654,10 +654,19 @@ AcpiWalkNamespace (
         goto UnlockAndExit;
     }
 
+    /* Now we can validate the starting node */
+
+    if (!AcpiNsValidateHandle (StartObject))
+    {
+        Status = AE_BAD_PARAMETER;
+        goto UnlockAndExit2;
+    }
+
     Status = AcpiNsWalkNamespace (Type, StartObject, MaxDepth,
                 ACPI_NS_WALK_UNLOCK, DescendingCallback,
                 AscendingCallback, Context, ReturnValue);
 
+UnlockAndExit2:
     (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
 
 UnlockAndExit: