From 9844aa2521ccfb1a2d73745680327b79e0574445 Mon Sep 17 00:00:00 2001
From: "djm@openbsd.org" <djm@openbsd.org>
Date: Wed, 21 Feb 2024 05:57:34 +0000
Subject: [PATCH] upstream: fix proxy multiplexing mode, broken when keystroke
 timing

obfuscation was added. GHPR#463 from montag451

OpenBSD-Commit-ID: 4e412d59b3f557d431f1d81c715a3bc0491cc677
---
 clientloop.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/clientloop.c b/clientloop.c
index eb4902905fb..8ec36af94b3 100644
--- a/clientloop.c
+++ b/clientloop.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: clientloop.c,v 1.402 2023/11/24 00:31:30 dtucker Exp $ */
+/* $OpenBSD: clientloop.c,v 1.403 2024/02/21 05:57:34 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -517,7 +517,7 @@ send_chaff(struct ssh *ssh)
 {
 	int r;
 
-	if ((ssh->kex->flags & KEX_HAS_PING) == 0)
+	if (ssh->kex == NULL || (ssh->kex->flags & KEX_HAS_PING) == 0)
 		return 0;
 	/* XXX probabilistically send chaff? */
 	/*