[PATCH] hid: elo: fix memory leak in elo_probe

[Dongliang Mu]

From: Dongliang Mu <mudongliangabcd@xxxxxxxxx>

When hid_parse in elo_probe fails, it forgets to call usb_put_dev to
decrease the refcount.

Fix this by adding usb_put_dev in the error handling code of elo_probe

Fixes: fbf42729d0e9 ("HID: elo: update the reference count of the usb device structure")
Reported-by: syzkaller <syzkaller@xxxxxxxxxxxxxxxx>
Signed-off-by: Dongliang Mu <mudongliangabcd@xxxxxxxxx>
---
 drivers/hid/hid-elo.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hid/hid-elo.c b/drivers/hid/hid-elo.c
index 8e960d7b233b..9b42b0cdeef0 100644
--- a/drivers/hid/hid-elo.c
+++ b/drivers/hid/hid-elo.c
@@ -262,6 +262,7 @@ static int elo_probe(struct hid_device *hdev, const struct hid_device_id *id)
 
 	return 0;
 err_free:
+	usb_put_dev(udev);
 	kfree(priv);
 	return ret;
 }
-- 
2.25.1