+sanity check of NULL IoGetCurrentIrpStackLocation(Irp)->FileObject

diff --git a/ntoskrnl/io/irp.c b/ntoskrnl/io/irp.c
index e967145..8b54d39 100644 (file)
--- a/ntoskrnl/io/irp.c
+++ b/ntoskrnl/io/irp.c
@@ -348,6 +348,8 @@ IoIsOperationSynchronous(IN PIRP Irp)
 
   /* Check the FILE_OBJECT's flags first. */
   FileObject = IoGetCurrentIrpStackLocation(Irp)->FileObject;
+  if (FileObject == NULL)
+    KeBugCheck(0);
   if (!(FO_SYNCHRONOUS_IO & FileObject->Flags))
     {
       /* Check IRP's flags. */