From a8a97091fe3875b589db3612bec8377e30ad4199 Mon Sep 17 00:00:00 2001
From: Aleksey Bragin <aleksey@reactos.org>
Date: Fri, 26 Dec 2008 23:52:25 +0300
Subject: [PATCH] ntdll: Fix memory corruption in RtlSetBits.

---
 dlls/ntdll/rtlbitmap.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/ntdll/rtlbitmap.c b/dlls/ntdll/rtlbitmap.c
index 3656d24f1c4..ef033b22848 100644
--- a/dlls/ntdll/rtlbitmap.c
+++ b/dlls/ntdll/rtlbitmap.c
@@ -170,7 +170,8 @@ VOID WINAPI RtlSetBits(PRTL_BITMAP lpBits, ULONG ulStart, ULONG ulCount)
   }
 
   /* Set remaining bits, if any */
-  *lpOut |= NTDLL_maskBits[ulCount & 0x7];
+  if (ulCount & 0x7)
+    *lpOut |= NTDLL_maskBits[ulCount & 0x7];
 }
 
 /*************************************************************************
-- 
2.11.4.GIT