mceusb: fix NULL-deref at probe

Make sure to check for the required out endpoint to avoid dereferencing a NULL-pointer in mce_request_packet should a malicious device lack such an endpoint. Note that this path it hit during probe.

---

Found through inspection, compile tested only.

Johan

 drivers/media/rc/mceusb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

index 238d8eaf7d94..93b16fe3ab38 100644
@@ -1288,8 +1288,8 @@ static int mceusb_dev_probe(struct usb_interface *intf,
 			}
 		}
 	}
-	if (ep_in == NULL) {
-		dev_dbg(&intf->dev, "inbound and/or endpoint not found");
+	if (!ep_in || !ep_out) {
+		dev_dbg(&intf->dev, "required endpoints not found\n");
 		return -ENODEV;
 	}
 

2.12.0