File ntp-sntp-assert.patch of Package ntp

--- sntp/main.c.orig
+++ sntp/main.c
@@ -981,6 +981,7 @@ void sntp_addremove_fd(
 		return;
 	}
 
+	make_socket_nonblocking(fd);
 	ev = event_new(base, fd, EV_READ | EV_PERSIST,
 		       &worker_resp_cb, c);
 	if (NULL == ev) {