[pschweitzer] 73362: [FASTFAT] In IRP_MJ_QUERY_INFORMATION/IRP_MJ_SET_INFORMATION, handle the case when we receive buggy FO without FCB. This fixes bugchecks when using FileSpy. CORE-12448

Author: pschweitzer
Date: Wed Nov 23 18:21:03 2016
New Revision: 73362

URL: http://svn.reactos.org/svn/reactos?rev=73362&view=rev
Log:
[FASTFAT]
In IRP_MJ_QUERY_INFORMATION/IRP_MJ_SET_INFORMATION, handle the case when we receive buggy
FO without FCB.
This fixes bugchecks when using FileSpy.

CORE-12448

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

Modified: trunk/reactos/drivers/filesystems/fastfat/finfo.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/filesystems/fastfa…
==============================================================================
--- trunk/reactos/drivers/filesystems/fastfat/finfo.c	[iso-8859-1] (original)
+++ trunk/reactos/drivers/filesystems/fastfat/finfo.c	[iso-8859-1] Wed Nov 23 18:21:03
2016
@@ -1444,6 +1444,12 @@
     DPRINT("VfatQueryInformation is called for '%s'\n",
            FileInformationClass >= FileMaximumInformation - 1 ? "????" :
FileInformationClassNames[FileInformationClass]);
 
+    if (FCB == NULL)
+    {
+        DPRINT1("IRP_MJ_QUERY_INFORMATION without FCB!\n");
+        IrpContext->Irp->IoStatus.Information = 0;
+        return STATUS_INVALID_PARAMETER;
+    }
 
     SystemBuffer = IrpContext->Irp->AssociatedIrp.SystemBuffer;
     BufferLength = IrpContext->Stack->Parameters.QueryFile.Length;
@@ -1569,6 +1575,13 @@
     DPRINT("FileInformationClass %d\n", FileInformationClass);
     DPRINT("SystemBuffer %p\n", SystemBuffer);
 
+    if (FCB == NULL)
+    {
+        DPRINT1("IRP_MJ_SET_INFORMATION without FCB!\n");
+        IrpContext->Irp->IoStatus.Information = 0;
+        return STATUS_INVALID_PARAMETER;
+    }
+
     /* Special: We should call MmCanFileBeTruncated here to determine if changing
        the file size would be allowed.  If not, we bail with the right error.
        We must do this before acquiring the lock. */