ACPICA: Utilities: Fix memory leak in acpi_ut_copy_iobject_to_iobject

Adds return status check on copy routines to delete the allocated destination
object if either copy fails. Reported by Colin Ian King on bugs.acpica.org,
Bug 1087.
The last applicable commit:
 Commit: 3371c19c294a4cb3649aa4e84606be8a1d999e61
 Subject: ACPICA: Remove ACPI_GET_OBJECT_TYPE macro

Link: https://bugs.acpica.org/show_bug.cgi?id=1087
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Cc: 3.9+ <stable@vger.kernel.org> # 3.9+
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

diff --git a/drivers/acpi/acpica/utcopy.c b/drivers/acpi/acpica/utcopy.c
index 270c164..ff601c0 100644 (file)
--- a/drivers/acpi/acpica/utcopy.c
+++ b/drivers/acpi/acpica/utcopy.c
@@ -1001,5 +1001,11 @@ acpi_ut_copy_iobject_to_iobject(union acpi_operand_object *source_desc,
                status = acpi_ut_copy_simple_object(source_desc, *dest_desc);
        }
 
+       /* Delete the allocated object if copy failed */
+
+       if (ACPI_FAILURE(status)) {
+               acpi_ut_remove_reference(*dest_desc);
+       }
+
        return_ACPI_STATUS(status);
 }