ACPICA: Fix to handle NULL package elements correctly

Fixed problem where NULL package elements were not returned to
the AcpiEvaluateObject interface correctly. Instead of returning a
NULL ACPI_OBJECT package element, the element was simply ignored,
potentially causing a buffer overflow and/or confusing the caller
who expected a fixed number of elements.

http://bugzilla.kernel.org/show_bug.cgi?id=10132

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/drivers/acpi/utilities/utobject.c b/drivers/acpi/utilities/utobject.c
index 1eccd3db876f..cdb8ff5b92d1 100644
--- a/drivers/acpi/utilities/utobject.c
+++ b/drivers/acpi/utilities/utobject.c
@@ -470,9 +470,8 @@ acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
         case ACPI_TYPE_PROCESSOR:
         case ACPI_TYPE_POWER:
 
-                /*
-                 * No extra data for these types
-                 */
+                /* No extra data for these types */
+
                 break;
 
         case ACPI_TYPE_LOCAL_REFERENCE: