Index: vsftpd-3.0.2/utility.c
===================================================================
--- vsftpd-3.0.2.orig/utility.c
+++ vsftpd-3.0.2/utility.c
@@ -104,11 +104,13 @@ bug(const char* p_text)
   {
     if (s_p_sess->ssl_slave_active)
     {
+      /* Write error through ssl_slave process */
       priv_sock_send_cmd(s_p_sess->ssl_consumer_fd, PRIV_SOCK_WRITE_USER_RESP);
       priv_sock_send_buf(s_p_sess->ssl_consumer_fd, text_buffer, text_len);
     }
-    else
+    else if (s_p_sess->p_control_ssl)
     {
+      /* From ssl_slave write the message directly */
       (void)ssl_write(s_p_sess->p_control_ssl, text_buffer, text_len);
     }
   }