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[NTOS] Implement support for opting out of NX policy

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Fixes crash in ntdll_winetest info on x64.
This commit is contained in:
Timo Kreuzer 2023-01-01 18:11:26 +01:00
parent 6133cc016d
commit 8227c5d380
1 changed files with 12 additions and 0 deletions
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12
ntoskrnl/mm/ARM3/pagfault.c
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@ -2333,14 +2333,26 @@ UserFault:
}
}
#if _MI_HAS_NO_EXECUTE
/* Check for execution of non-executable memory */
if (MI_IS_INSTRUCTION_FETCH(FaultCode) &&
!MI_IS_PAGE_EXECUTABLE(&TempPte))
{
/* Check if execute enable was set */
if (CurrentProcess->Pcb.Flags.ExecuteEnable)
{
/* Fix up the PTE to be executable */
TempPte.u.Hard.NoExecute = 0;
MI_UPDATE_VALID_PTE(PointerPte, TempPte);
MiUnlockProcessWorkingSet(CurrentProcess, CurrentThread);
return STATUS_SUCCESS;
}
/* Return the status */
MiUnlockProcessWorkingSet(CurrentProcess, CurrentThread);
return STATUS_ACCESS_VIOLATION;
}
#endif
/* The fault has already been resolved by a different thread */
MiUnlockProcessWorkingSet(CurrentProcess, CurrentThread);