[pschweitzer] 67910: [NTFS] Acquire FCB resource (shared) before trying to attempt its data

Author: pschweitzer
Date: Mon May 25 17:06:00 2015
New Revision: 67910

URL: http://svn.reactos.org/svn/reactos?rev=67910&view=rev
Log:
[NTFS]
Acquire FCB resource (shared) before trying to attempt its data

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

Modified: trunk/reactos/drivers/filesystems/ntfs/finfo.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/ntfs/f…
==============================================================================
--- trunk/reactos/drivers/filesystems/ntfs/finfo.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/ntfs/finfo.c	[iso-8859-1] Mon May 25 17:06:00 2015
@@ -246,6 +246,12 @@
     SystemBuffer = Irp->AssociatedIrp.SystemBuffer;
     BufferLength = Stack->Parameters.QueryFile.Length;
 
+    if (!ExAcquireResourceSharedLite(&Fcb->MainResource,
+                                     (BOOLEAN)(IrpContext->Flags &
IRPCONTEXT_CANWAIT)))
+    {
+        return NtfsMarkIrpContextForQueue(IrpContext);
+    }
+
     switch (FileInformationClass)
     {
         case FileStandardInformation:
@@ -301,6 +307,8 @@
             Status = STATUS_INVALID_PARAMETER;
     }
 
+    ExReleaseResourceLite(&Fcb->MainResource);
+
     if (NT_SUCCESS(Status))
         Irp->IoStatus.Information =
             Stack->Parameters.QueryFile.Length - BufferLength;