MiDereferenceExtendInfo

VOID __stdcall MiDereferenceExtendInfo(_MMVAD *Vad, _CONTROL_AREA *ControlArea){
  _ETHREAD *CurrentThread; 
  void *v3; 
  unsigned int SessionId; 
  _ETHREAD *v7; 
  char v8; 
  int v9; 
  bool v10; 
  __int64 v11; 
  unsigned __int64 v12; 
  __int64 v13; 
  int v14; 
  CurrentThread = (_ETHREAD *)KeGetCurrentThread();
  v3 = 0i64;
  --*((_WORD *)CurrentThread + 243);
  ExAcquirePushLockExclusiveEx((UINT64)&qword_140C4C6D0, 0i64);
  SessionId = -1;
  if( !--*(_DWORD *)(*((_QWORD *)Vad + 15) + 8i64) )
  {
    v3 = (void *)*((_QWORD *)Vad + 15);
    *(_QWORD *)(*(_QWORD *)ControlArea + 32i64) = 0i64;
  }
  if( (_InterlockedExchangeAdd64((volatile signed __int64 *)&qword_140C4C6D0, 0xFFFFFFFFFFFFFFFFui64) & 6) == 2 )
    ExfTryToWakePushLock((volatile INT64 *)&qword_140C4C6D0);
  v14 = 0;
  v7 = (_ETHREAD *)KeGetCurrentThread();
  if( (unsigned int)MiGetSystemRegionType((UINT64)&qword_140C4C6D0) == 1 )
    SessionId = MmGetSessionIdEx(*((_QWORD *)v7 + 23));
  --*((_WORD *)v7 + 243);
  v8 = ++*((_BYTE *)v7 + 794);
  v9 = (*((char *)v7 + 792) | *((char *)v7 + 870)) ^ 0x3F;
  while( 1 )
  {
    v10 = !_BitScanReverse((unsigned int *)&v11, v9);
    if( v10 )
      break;
    v12 = *((_QWORD *)v7 + 100) + 96 * v11;
    v9 &= ~(1 << v11);
    if( (*(_BYTE *)(v12 + 26) & 1) != 0
      && (*(_DWORD *)(v12 + 32) & 1) == 0
      && (*(_QWORD *)(v12 + 32) & 0x7FFFFFFFFFFFFFFCi64) == ((unsigned __int64)&qword_140C4C6D0 & 0x7FFFFFFFFFFFFFFCi64)
      && *(_DWORD *)(v12 + 40) == SessionId )
    {
      *(_BYTE *)(v12 + 26) &= ~1u;
      if( *(_QWORD *)(v12 + 32) )
      {
        if( v12 )
        {
          *(_BYTE *)(v12 + 32) |= 2u;
          if( *(__int64 *)(v12 + 32) < 0 )
            KiAbEntryRemoveFromTree(v12);
          v14 = *(_DWORD *)(v12 + 88) & 0x1FFFF;
          *(_DWORD *)(v12 + 88) &= 0xFFFE0000;
          *(_BYTE *)(v12 + 25) &= ~1u;
          *(_QWORD *)(v12 + 32) = 0i64;
          v13 = (__int64)(v12 - *((_QWORD *)v7 + 100)) / 96;
          if( v8 == 1 )
            *((_BYTE *)v7 + 792) |= 1 << v13;
          else
            _InterlockedOr8((volatile signed __int8 *)v7 + 870, 1 << v13);
          goto LABEL_19;
        }
        break;
      }
    }
  }
  if( (*((_DWORD *)v7 + 30) & 0x10000) == 0 )
    KeBugCheckEx(0x162u, (ULONG_PTR)v7, (ULONG_PTR)&qword_140C4C6D0, SessionId, 0i64);
LABEL_19:
  --*((_BYTE *)v7 + 794);
  KiAbThreadRemoveBoosts((ULONG_PTR)v7, (__int64)&qword_140C4C6D0, (unsigned int *)&v14);
  v10 = (*((_WORD *)v7 + 243))++ == 0xFFFF;
  if( v10 && *((_ETHREAD **)v7 + 19) != (_ETHREAD *)((char *)v7 + 152) )
    KiCheckForKernelApcDelivery();
  KiLeaveGuardedRegionUnsafe((__int64)CurrentThread);
  if( v3 )
    ExFreePoolWithTag(v3, 0);
}

Referenced by: