[reactos] 02/72: [NTFS] Add fixes to WriteAttribute(): -Remove erroneous check for end of run (before writing to the last run returned) -Properly dereference RealLengthWritten pointer, as reported in CR-90

[Trevor Thompson]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=ea6b9622c4328b1d3c5119...

commit ea6b9622c4328b1d3c51196edf004febb12dd68b
Author: Trevor Thompson [e-mail]
AuthorDate: Sun Jun 12 04:02:52 2016 +0000

[NTFS]
    Add fixes to WriteAttribute():
    -Remove erroneous check for end of run (before writing to the last run returned)
    -Properly dereference RealLengthWritten pointer, as reported in CR-90

svn path=/branches/GSoC_2016/NTFS/; revision=71616
---
 drivers/filesystems/ntfs/mft.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/drivers/filesystems/ntfs/mft.c b/drivers/filesystems/ntfs/mft.c
index 43b38ef2ab..1294264e69 100644
--- a/drivers/filesystems/ntfs/mft.c
+++ b/drivers/filesystems/ntfs/mft.c
@@ -517,17 +517,6 @@ WriteAttribute(PDEVICE_EXTENSION Vcb,
         }
         else
             DataRunStartLCN = -1;
-
-        if (*DataRun == 0)
-        {
-            if (Length == 0)
-                return STATUS_SUCCESS;
-
-            // This code shouldn't execute, because we should have extended the allocation size
-            // or failed the request by now. It's just a sanity check.
-            DPRINT1("Encountered EOF before expected!\n");
-            return STATUS_END_OF_FILE;
-        }
     }

// Do we have more data to write?
@@ -556,7 +545,7 @@ WriteAttribute(PDEVICE_EXTENSION Vcb,

Length -= WriteLength;
         SourceBuffer += WriteLength;
-        RealLengthWritten += WriteLength;
+        *RealLengthWritten += WriteLength;

// We finished this request, but there's still data in this data run. 
         if (Length == 0 && WriteLength != DataRunLength * Vcb->NtfsInfo.BytesPerCluster)