1 files changed, 7 insertions, 3 deletions

diff --git a/clientloop.c b/clientloop.c
index 170155442..2590962b1 100644
--- a/clientloop.c
+++ b/clientloop.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: clientloop.c,v 1.337 2020/01/29 08:17:49 djm Exp $ */
+/* $OpenBSD: clientloop.c,v 1.338 2020/01/30 07:20:57 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -1392,8 +1392,12 @@ client_loop(struct ssh *ssh, int have_pty, int escape_char_arg,
                  * Send as much buffered packet data as possible to the
                  * sender.
                  */
-                if (FD_ISSET(connection_out, writeset))
-                        ssh_packet_write_poll(ssh);
+                if (FD_ISSET(connection_out, writeset)) {
+                        if ((r = ssh_packet_write_poll(ssh)) != 0) {
+                                sshpkt_fatal(ssh, r,
+                                    "%s: ssh_packet_write_poll", __func__);
+                        }
+                }
 
                 /*
                  * If we are a backgrounded control master, and the