[PATCH 01/16] ACPICA: Fix possible memory leak for module-level code execution

[Lin Ming]

An object can be leaked for each block of executed module-level
code if the interpreter slack mode is enabled. The change deletes
any implicitly returned object in this case.

Signed-off-by: Lin Ming <ming.m.lin@xxxxxxxxx>
Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx>
---
 drivers/acpi/acpica/nseval.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/acpica/nseval.c b/drivers/acpi/acpica/nseval.c
index f771e97..65e0d1a 100644
--- a/drivers/acpi/acpica/nseval.c
+++ b/drivers/acpi/acpica/nseval.c
@@ -415,6 +415,12 @@ acpi_ns_exec_module_code(union acpi_operand_object *method_obj,
 	ACPI_DEBUG_PRINT((ACPI_DB_INIT, "Executed module-level code at %p\n",
 			  method_obj->method.aml_start));
 
+	/* Delete a possible implicit return value (in slack mode) */
+
+	if (info->return_object) {
+		acpi_ut_remove_reference(info->return_object);
+	}
+
 	/* Detach the temporary method object */
 
 	acpi_ns_detach_object(parent_node);