From a46ee7dafe39defcecdf812aed8d09cfab6f5e4e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Gardou?= <jerome.gardou@reactos.org>
Date: Mon, 1 Feb 2021 10:42:37 +0100
Subject: [PATCH] [KMTEST:NTOS_CC] Fix buffer size calculation

---
 modules/rostests/kmtests/ntos_cc/CcSetFileSizes_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/rostests/kmtests/ntos_cc/CcSetFileSizes_drv.c b/modules/rostests/kmtests/ntos_cc/CcSetFileSizes_drv.c
index 241312c12c5..89bc3973cfb 100644
--- a/modules/rostests/kmtests/ntos_cc/CcSetFileSizes_drv.c
+++ b/modules/rostests/kmtests/ntos_cc/CcSetFileSizes_drv.c
@@ -467,7 +467,7 @@ TestIrpHandler(
 
             if (Length > (Fcb->Header.FileSize.QuadPart - Offset.QuadPart))
             {
-                RtlFillMemory(Buffer, Length - Fcb->Header.FileSize.QuadPart, 0xBD);
+                RtlFillMemory(Buffer, Length - (Fcb->Header.FileSize.QuadPart - Offset.QuadPart), 0xBD);
             }
         }
         else