ACPICA API Test Suite detects the next problem.

There is incomplete cleanup branch in the code of the
function AcpiUtUpdateObjectReference (file utilities/utdelete.c):

            for (i = 0; i < Object->Package.Count; i++)
            {
                /*
                 * Push each element onto the stack for later processing.
                 * Note: There can be null elements within the package,
                 * these are simply ignored
                 */
                Status = AcpiUtCreateUpdateStateAndPush (
                            Object->Package.Elements[i], Action, &StateList);
                if (ACPI_FAILURE (Status))
                {
                    goto ErrorExit;
                }
            }
...
ErrorExit:

    ACPI_EXCEPTION ((AE_INFO, Status,
        "Could not update object reference count"));

    return_ACPI_STATUS (Status);

On testing conditions when the AcpiUtCreateUpdateStateAndPush 
returns the AE_NO_MEMORY due to memory allocation problems,
the AcpiUtUpdateObjectReference is leaved without the Update
States deletion that leads to memory leak.

Perhaps, the AcpiUtUpdateObjectReference code could be updated
to something like following:

ErrorExit:

    ACPI_EXCEPTION ((AE_INFO, Status,
        "Could not update object reference count"));

+    /* Free allocated Update States */
+    while (StateList)
+    {
+        State = AcpiUtPopGenericState (&StateList);
+        AcpiUtDeleteGenericState (State);
+    }

    return_ACPI_STATUS (Status);


INTERNAL API TS BUG NUMBER:

             28