ViZwCheckApcRequirement

VOID __stdcall ViZwCheckApcRequirement(VOID *Caller){
  ULONG_PTR v1; 
  unsigned __int8 CurrentIrql; 
  UINT64 v3; 

  v1 = (unsigned int)Caller;
  CurrentIrql = KeGetCurrentIrql();
  if( (MmVerifierData & 0x100) != 0 && (CurrentIrql || KeAreAllApcsDisabled()) )
    VerifierBugCheckIfAppropriate(0xC4ui64, 0xE6u, v1, CurrentIrql, KeGetCurrentThread()->SpecialApcDisable, v3);
}

Referenced by:

VfZwDeviceIoControlFile
VfZwFsControlFile
VfZwQueryDirectoryFile
VfZwReadFile
VfZwWriteFile