From 60f5fc07fcacb7403aaaabc100525138c1548507 Mon Sep 17 00:00:00 2001
From: Pierre Schweitzer <pierre@reactos.org>
Date: Thu, 14 Apr 2016 20:42:12 +0000
Subject: [PATCH] [FREELDR] Cherrypick r71159

svn path=/trunk/; revision=71160
---
 reactos/boot/freeldr/freeldr/lib/fs/ntfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/reactos/boot/freeldr/freeldr/lib/fs/ntfs.c b/reactos/boot/freeldr/freeldr/lib/fs/ntfs.c
index e8a5745cbe7..8aa5ea4d243 100644
--- a/reactos/boot/freeldr/freeldr/lib/fs/ntfs.c
+++ b/reactos/boot/freeldr/freeldr/lib/fs/ntfs.c
@@ -302,8 +302,8 @@ static ULONG NtfsReadAttribute(PNTFS_VOLUME_INFO Volume, PNTFS_ATTR_CONTEXT Cont
 
     ReadLength = (ULONG)min(DataRunLength * Volume->ClusterSize - (Offset - CurrentOffset), Length);
     if (DataRunStartLCN == -1)
-    RtlZeroMemory(Buffer, ReadLength);
-    if (NtfsDiskRead(Volume, DataRunStartLCN * Volume->ClusterSize + Offset - CurrentOffset, ReadLength, Buffer))
+        RtlZeroMemory(Buffer, ReadLength);
+    if (DataRunStartLCN == -1 || NtfsDiskRead(Volume, DataRunStartLCN * Volume->ClusterSize + Offset - CurrentOffset, ReadLength, Buffer))
     {
         Length -= ReadLength;
         Buffer += ReadLength;