Bluetooth: mgmt: Don't allow to set invalid value to DeviceID source

Reply with MGMT_STATUS_INVALID_PARAMS when userspace is trying to set
source with out-of-scope value.
Signed-off-by: Szymon Janc <szymon.janc@tieto.com>
Acked-by: Gustavo Padovan <gustavo@padovan.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

net/bluetooth/mgmt.c

@@ -2532,12 +2532,19 @@ static int set_device_id(struct sock *sk, struct hci_dev *hdev, void *data,
 {
 	struct mgmt_cp_set_device_id *cp = data;
 	int err;
+	__u16 source;
 
 	BT_DBG("%s", hdev->name);
 
+	source = __le16_to_cpu(cp->source);
+
+	if (source > 0x0002)
+		return cmd_status(sk, hdev->id, MGMT_OP_SET_DEVICE_ID,
+				  MGMT_STATUS_INVALID_PARAMS);
+
 	hci_dev_lock(hdev);
 
-	hdev->devid_source = __le16_to_cpu(cp->source);
+	hdev->devid_source = source;
 	hdev->devid_vendor = __le16_to_cpu(cp->vendor);
 	hdev->devid_product = __le16_to_cpu(cp->product);
 	hdev->devid_version = __le16_to_cpu(cp->version);