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Fish:
  If PcdNullPointerDetectionPropertyMask BIT7 is set, it will be disabled =
on EndOfDxe. Do you mean to always turn off it on ExitBootServices? But, af=
ter ExitBootSerivces, there should be no memory allocation.=20

Thanks
Liming
> -----=E9=82=AE=E4=BB=B6=E5=8E=9F=E4=BB=B6-----
> =E5=8F=91=E4=BB=B6=E4=BA=BA: bounce+27952+64665+4905953+8761045@groups.i=
o
> <bounce+27952+64665+4905953+8761045@groups.io> =E4=BB=A3=E8=A1=A8 Andrew=
 Fish
> via groups.io
> =E5=8F=91=E9=80=81=E6=97=B6=E9=97=B4: 2020=E5=B9=B48=E6=9C=8827=E6=97=A5=
 8:34
> =E6=94=B6=E4=BB=B6=E4=BA=BA: edk2-devel-groups-io <devel@edk2.groups.io>
> =E4=B8=BB=E9=A2=98: [edk2-devel]
> gEfiMdeModulePkgTokenSpaceGuid.PcdNullPointerDetectionPropertyMask
> and ExitBootServices
>=20
> I think I might have found a case when grub calls ExitBootServices,
> PcdNullPointerDetectionPropertyMask is TRUE, and grub decided to allocat=
e
> memory in the guard area=E2=80=A6.
>=20
> Is there any code to turn off PcdNullPointerDetectionPropertyMask at
> ExitBootServices time?
>=20
> Seems like MemoryProtectionExitBootServicesCallback() should also turn o=
ff
> PcdNullPointerDetectionPropertyMask?
>=20
> Thanks,
>=20
> Andrew Fish
>=20