diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 9832f8445d43..e121e0bea0cc 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -1683,6 +1683,9 @@ int hci_get_auth_info(struct hci_dev *hdev, void __user *arg)
 	struct hci_auth_info_req req;
 	struct hci_conn *conn;
 
+	if ((!(&hdev->lock)) || (!hdev))
+		return -EBADFD;
+
 	if (copy_from_user(&req, arg, sizeof(req)))
 		return -EFAULT;