ACPI: fix boot oops regression in thermal

Fix a memory overflow bug when copying
NULL internal package element object to external.

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

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/acpi/utilities/utobject.c b/drivers/acpi/utilities/utobject.c
index 76ee766c84f948ed2d8749f06486338a792f7e05..e08b3fa6639f593c0c1d4c893d591be26d36243c 100644 (file)
--- a/drivers/acpi/utilities/utobject.c
+++ b/drivers/acpi/utilities/utobject.c
@@ -432,7 +432,7 @@ acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
         * element -- which is legal)
         */
        if (!internal_object) {
-               *obj_length = 0;
+               *obj_length = sizeof(union acpi_object);
                return_ACPI_STATUS(AE_OK);
        }