[tfaber] 65276: [FASTFAT] - Fix incorrect referencing in VfatCreateFile. vfatGetFCBForFile expects a reference on ParentFcb (and may release it), and also returns a referenced parent FCB. CORE-8756...

Author: tfaber
Date: Wed Nov  5 23:23:52 2014
New Revision: 65276

URL: http://svn.reactos.org/svn/reactos?rev=65276&view=rev
Log:
[FASTFAT]
- Fix incorrect referencing in VfatCreateFile. vfatGetFCBForFile expects a reference on
ParentFcb (and may release it), and also returns a referenced parent FCB.
CORE-8756 #resolve

Modified:
    trunk/reactos/drivers/filesystems/fastfat/create.c
    trunk/reactos/drivers/filesystems/fastfat/direntry.c
    trunk/reactos/drivers/filesystems/fastfat/dirwr.c

Modified: trunk/reactos/drivers/filesystems/fastfat/create.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/fastfa…
==============================================================================
--- trunk/reactos/drivers/filesystems/fastfat/create.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/fastfat/create.c	[iso-8859-1] Wed Nov  5 23:23:52
2014
@@ -565,11 +565,14 @@
         LONG idx, FileNameLen;
 
         ParentFcb = (FileObject->RelatedFileObject != NULL) ?
FileObject->RelatedFileObject->FsContext : NULL;
+        if (ParentFcb)
+        {
+            vfatGrabFCB(DeviceExt, ParentFcb);
+        }
         Status = vfatGetFCBForFile(DeviceExt, &ParentFcb, &TargetFcb,
&PathNameU);
 
-        if (Status == STATUS_SUCCESS)
-        {
-            vfatGrabFCB(DeviceExt, ParentFcb);
+        if (NT_SUCCESS(Status))
+        {
             vfatReleaseFCB(DeviceExt, TargetFcb);
             Irp->IoStatus.Information = FILE_EXISTS;
         }
@@ -623,6 +626,7 @@
         if (NT_SUCCESS(Status))
         {
             pFcb = FileObject->FsContext;
+            ASSERT(pFcb == ParentFcb);
 
             if (pFcb->OpenHandleCount == 0)
             {
@@ -640,7 +644,6 @@
                                             FALSE);
                 if (!NT_SUCCESS(Status))
                 {
-                    vfatReleaseFCB(DeviceExt, ParentFcb);
                     VfatCloseFile(DeviceExt, FileObject);
                     return Status;
                 }

Modified: trunk/reactos/drivers/filesystems/fastfat/direntry.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/fastfa…
==============================================================================
--- trunk/reactos/drivers/filesystems/fastfat/direntry.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/fastfat/direntry.c	[iso-8859-1] Wed Nov  5 23:23:52
2014
@@ -201,12 +201,6 @@
             CcUnpinData(*pContext);
         }
 
-        if (!pDirFcb->FileObject)
-        {
-            DPRINT1("Buggy FCB (cleaned up)! %S (%d / %u)\n",
pDirFcb->PathNameBuffer, pDirFcb->RefCount, pDirFcb->OpenHandleCount);
-            return STATUS_NO_MORE_ENTRIES;
-        }
-
         if (FileOffset.u.LowPart >= pDirFcb->RFCB.FileSize.u.LowPart ||
             !CcMapData(pDirFcb->FileObject, &FileOffset, PAGE_SIZE, TRUE,
pContext, pPage))
         {

Modified: trunk/reactos/drivers/filesystems/fastfat/dirwr.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/fastfa…
==============================================================================
--- trunk/reactos/drivers/filesystems/fastfat/dirwr.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/fastfat/dirwr.c	[iso-8859-1] Wed Nov  5 23:23:52
2014
@@ -166,11 +166,6 @@
             if (Context)
             {
                 CcUnpinData(Context);
-            }
-            if (!pDirFcb->FileObject)
-            {
-                DPRINT1("Buggy FCB (cleaned up)! %S (%d / %u)\n",
pDirFcb->PathNameBuffer, pDirFcb->RefCount, pDirFcb->OpenHandleCount);
-                return FALSE;
             }
             if (!CcPinRead(pDirFcb->FileObject, &FileOffset,
DeviceExt->FatInfo.BytesPerCluster,
                       TRUE, &Context, (PVOID*)&pFatEntry))