From 757ff359b58c15d66807d3183606ee73d97d728d Mon Sep 17 00:00:00 2001
From: Art Yerkes <art.yerkes@gmail.com>
Date: Sun, 15 Feb 2004 07:04:45 +0000
Subject: [PATCH] Fixed a bug in AppendUnicodeStringToString which could cause
 a null to be placed one position after the end of a completely full string.

svn path=/trunk/; revision=8191
---
 reactos/lib/ntdll/rtl/unicode.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/reactos/lib/ntdll/rtl/unicode.c b/reactos/lib/ntdll/rtl/unicode.c
index 42ae9d20682..f182f7f55d8 100644
--- a/reactos/lib/ntdll/rtl/unicode.c
+++ b/reactos/lib/ntdll/rtl/unicode.c
@@ -1,4 +1,4 @@
-/* $Id: unicode.c,v 1.36 2004/02/03 14:37:35 ekohl Exp $
+/* $Id: unicode.c,v 1.37 2004/02/15 07:04:45 arty Exp $
  *
  * COPYRIGHT:       See COPYING in the top level directory
  * PROJECT:         ReactOS kernel
@@ -203,7 +203,8 @@ RtlAppendUnicodeStringToString(
 
 	memcpy((PVOID)Destination->Buffer + Destination->Length, Source->Buffer, Source->Length);
         Destination->Length += Source->Length;
-	Destination->Buffer[Destination->Length / sizeof(WCHAR)] = 0;
+	if( Destination->MaximumLength > Destination->Length )
+	    Destination->Buffer[Destination->Length / sizeof(WCHAR)] = 0;
 
 	return STATUS_SUCCESS;
 }