[PATCH 4.16 152/272] ACPICA: Fix memory leak on unusual memory leak

[Greg Kroah-Hartman]

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bob Moore <robert.mo...@intel.com>

[ Upstream commit 1c29c372b2d1d2415601041532745ce859f24126 ]

Fixes a single-object memory leak on a store-to-reference method
invocation. ACPICA BZ 1439.

Signed-off-by: Bob Moore <robert.mo...@intel.com>
Signed-off-by: Erik Schmauss <erik.schma...@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
 drivers/acpi/acpica/psargs.c |    4 ++++
 1 file changed, 4 insertions(+)

--- a/drivers/acpi/acpica/psargs.c
+++ b/drivers/acpi/acpica/psargs.c
@@ -890,6 +890,10 @@ acpi_ps_get_next_arg(struct acpi_walk_st
                                                      
ACPI_POSSIBLE_METHOD_CALL);
 
                        if (arg->common.aml_opcode == AML_INT_METHODCALL_OP) {
+
+                               /* Free method call op and corresponding 
namestring sub-ob */
+
+                               acpi_ps_free_op(arg->common.value.arg);
                                acpi_ps_free_op(arg);
                                arg = NULL;
                                walk_state->arg_count = 1;