From a860c39644b50288a54d12b8eefadc8cd7dfac73 Mon Sep 17 00:00:00 2001
From: brueffer <brueffer@FreeBSD.org>
Date: Fri, 14 Feb 2014 20:34:24 +0000
Subject: In chat_UpdateSet(), initialize the input buffer to prevent stale
 data from previous timed out commands.

PR:		186530
Submitted by:	Alexander Zagrebin <alexz at visp.ru>
Reviewed by:	brian
MFC after:	1 week
---
 usr.sbin/ppp/chat.c | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'usr.sbin/ppp')

diff --git a/usr.sbin/ppp/chat.c b/usr.sbin/ppp/chat.c
index 04b2679..daa52cd 100644
--- a/usr.sbin/ppp/chat.c
+++ b/usr.sbin/ppp/chat.c
@@ -154,6 +154,11 @@ chat_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
     else {
       /* c->state = CHAT_EXPECT; */
       c->argptr = &arg_term;
+      /*
+	We have to clear the input buffer, because it contains output
+	from the previous (timed out) command.
+      */
+      c->bufstart = c->bufend;
     }
     c->TimedOut = 0;
   }
-- 
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