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

Greg Kroah-Hartman
2018-05-28T11:40:24Z

From: Bob Moore <robert.moore@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.moore@intel.com>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@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;