HID: winwing: Add NULL check in winwing_init_led()

devm_kasprintf() can return a NULL pointer on failure,but this
returned value in winwing_init_led() is not checked.
Add NULL check in winwing_init_led(), to handle kernel NULL
pointer dereference error.

Fixes: 266c990debad ("HID: Add WinWing Orion2 throttle support")
Signed-off-by: Charles Han <hanchunchao@inspur.com>
Signed-off-by: Jiri Kosina <jkosina@suse.com>

diff --git a/drivers/hid/hid-winwing.c b/drivers/hid/hid-winwing.c
index 831b760c66ea7273abfc8134861c20caa45d56a6..d4afbbd2780797fecee4338e1c0f33e13fded2b5 100644 (file)
--- a/drivers/hid/hid-winwing.c
+++ b/drivers/hid/hid-winwing.c
@@ -106,6 +106,8 @@ static int winwing_init_led(struct hid_device *hdev,
                                                "%s::%s",
                                                dev_name(&input->dev),
                                                info->led_name);
+               if (!led->cdev.name)
+                       return -ENOMEM;
 
                ret = devm_led_classdev_register(&hdev->dev, &led->cdev);
                if (ret)