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authorErik Schmauss <erik.schmauss@intel.com>2019-04-08 23:42:29 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2019-04-09 12:25:27 +0300
commitdf9271d69f4016c1169699de9a826745688103bd (patch)
treeee3f555533a0f80b3b32ffcf424bdc8049c91dac
parent985d5124bfb0773edb8353237e5e8ddb614c3442 (diff)
downloadlinux-df9271d69f4016c1169699de9a826745688103bd.tar.xz
ACPICA: Namespace: add check to avoid null pointer dereference
ACPICA commit 7586a625f9c34c3169efd88470192bf63119e31a Some ACPICA userspace tools call acpi_ut_subsystem_shutdown() during cleanup and dereference a null pointer when cleaning up the namespace. Link: https://github.com/acpica/acpica/commit/7586a625 Signed-off-by: Erik Schmauss <erik.schmauss@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
-rw-r--r--drivers/acpi/acpica/nsalloc.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/nsalloc.c b/drivers/acpi/acpica/nsalloc.c
index 5470213b8e64..6eb63db72249 100644
--- a/drivers/acpi/acpica/nsalloc.c
+++ b/drivers/acpi/acpica/nsalloc.c
@@ -74,6 +74,10 @@ void acpi_ns_delete_node(struct acpi_namespace_node *node)
ACPI_FUNCTION_NAME(ns_delete_node);
+ if (!node) {
+ return_VOID;
+ }
+
/* Detach an object if there is one */
acpi_ns_detach_object(node);