diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 8b0c8e631324..cfaed01c7b97 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -2887,6 +2887,8 @@ int hci_abort_conn(struct hci_conn *conn, u8 reason)
 	 */
 	if (conn->abort_reason)
 		return 0;
+	if (!reason)
+		return -EINVAL;
 
 	bt_dev_dbg(hdev, "handle 0x%2.2x reason 0x%2.2x", conn->handle, reason);