From: Andy Lutomirski <luto@xxxxxxxxxx>
We have two memory leaks. If guid_already_parsed returned true, we leak
the wmi_block. If wmi_create_device failed, we leak the device.
Simplify the logic and fix both of them.
Signed-off-by: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx>
Cc: Mario Limonciello <mario_limonciello@xxxxxxxx>
Cc: Pali Rohár <pali.rohar@xxxxxxxxx>
Cc: Rafael Wysocki <rjw@xxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: platform-driver-x86@xxxxxxxxxxxxxxx
Cc: linux-acpi@xxxxxxxxxxxxxxx
Signed-off-by: Darren Hart (VMware) <dvhart@xxxxxxxxxxxxx>
---
drivers/platform/x86/wmi.c | 28 +++++++++++++++-------------
1 file changed, 15 insertions(+), 13 deletions(-)
diff --git a/drivers/platform/x86/wmi.c b/drivers/platform/x86/wmi.c
index f06b7c0..31c317f 100644
--- a/drivers/platform/x86/wmi.c
+++ b/drivers/platform/x86/wmi.c
@@ -757,6 +757,15 @@ static int parse_wdg(struct device *wmi_bus_dev, struct acpi_device *device)
if (debug_dump_wdg)
wmi_dump_wdg(&gblock[i]);
+ /*
+ * Some WMI devices, like those for nVidia hooks, have a
+ * duplicate GUID. It's not clear what we should do in this
+ * case yet, so for now, we'll just ignore the duplicate
+ * for device creation.
+ */
+ if (guid_already_parsed(device, gblock[i].guid))
+ continue;
+
wblock = kzalloc(sizeof(struct wmi_block), GFP_KERNEL);
if (!wblock)
return -ENOMEM;
@@ -764,19 +773,12 @@ static int parse_wdg(struct device *wmi_bus_dev, struct acpi_device *device)
wblock->acpi_device = device;
wblock->gblock = gblock[i];
- /*
- Some WMI devices, like those for nVidia hooks, have a
- duplicate GUID. It's not clear what we should do in this
- case yet, so for now, we'll just ignore the duplicate
- for device creation.
- */
- if (!guid_already_parsed(device, gblock[i].guid)) {
- retval = wmi_create_device(wmi_bus_dev, &gblock[i],
- wblock, device);
- if (retval) {
- wmi_free_devices(device);
- goto out_free_pointer;
- }
+ retval = wmi_create_device(wmi_bus_dev, &gblock[i],
+ wblock, device);
+ if (retval) {
+ put_device(&wblock->dev.dev);
+ wmi_free_devices(device);
+ goto out_free_pointer;
}
list_add_tail(&wblock->list, &wmi_block_list);
--
2.9.4
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