[pschweitzer] 71159: [NTFS] Don't attempt to read a sparse run of the disk. Patch by Trevor Thompson CORE-10998

Author: pschweitzer
Date: Thu Apr 14 20:39:55 2016
New Revision: 71159

URL: http://svn.reactos.org/svn/reactos?rev=71159&view=rev
Log:
[NTFS]
Don't attempt to read a sparse run of the disk.

Patch by Trevor Thompson

CORE-10998

Modified:
    trunk/reactos/drivers/filesystems/ntfs/mft.c

Modified: trunk/reactos/drivers/filesystems/ntfs/mft.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/ntfs/m…
==============================================================================
--- trunk/reactos/drivers/filesystems/ntfs/mft.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/ntfs/mft.c	[iso-8859-1] Thu Apr 14 20:39:55 2016
@@ -243,13 +243,19 @@
 
     ReadLength = (ULONG)min(DataRunLength * Vcb->NtfsInfo.BytesPerCluster - (Offset -
CurrentOffset), Length);
     if (DataRunStartLCN == -1)
+    {
         RtlZeroMemory(Buffer, ReadLength);
-    Status = NtfsReadDisk(Vcb->StorageDevice,
-                          DataRunStartLCN * Vcb->NtfsInfo.BytesPerCluster + Offset -
CurrentOffset,
-                          ReadLength,
-                          Vcb->NtfsInfo.BytesPerSector,
-                          (PVOID)Buffer,
-                          FALSE);
+        Status = STATUS_SUCCESS;
+    }
+    else
+    {
+        Status = NtfsReadDisk(Vcb->StorageDevice,
+                              DataRunStartLCN * Vcb->NtfsInfo.BytesPerCluster + Offset
- CurrentOffset,
+                              ReadLength,
+                              Vcb->NtfsInfo.BytesPerSector,
+                              (PVOID)Buffer,
+                              FALSE);
+    }
     if (NT_SUCCESS(Status))
     {
         Length -= ReadLength;