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[NTOS:MM] Fix remnants of CORE-17587

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Jérôme Gardou 2021-06-01 10:32:12 +02:00 • committed by Jérôme Gardou
parent 4ddc66f224
commit a5ea259b28
2 changed files with 18 additions and 10 deletions
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26
ntoskrnl/mm/i386/page.c
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@ -540,6 +540,10 @@ MmCreateVirtualMappingUnsafe(PEPROCESS Process,
/* Make sure our PDE is valid, and that everything is going fine */ /* Make sure our PDE is valid, and that everything is going fine */
if (Process == NULL) if (Process == NULL)
{ {
/* We don't support this in legacy Mm for kernel mappings */
ASSERT(ProtectionMask != MM_WRITECOPY);
ASSERT(ProtectionMask != MM_EXECUTE_WRITECOPY);
if (Address < MmSystemRangeStart) if (Address < MmSystemRangeStart)
{ {
DPRINT1("NULL process given for user-mode mapping at %p\n", Address); DPRINT1("NULL process given for user-mode mapping at %p\n", Address);
@ -567,14 +571,7 @@ MmCreateVirtualMappingUnsafe(PEPROCESS Process,
PointerPte = MiAddressToPte(Address); PointerPte = MiAddressToPte(Address);
if (Address >= MmSystemRangeStart) MI_MAKE_HARDWARE_PTE(&TempPte, PointerPte, ProtectionMask, Page);
{
MI_MAKE_HARDWARE_PTE_KERNEL(&TempPte, PointerPte, ProtectionMask, Page);
}
else
{
MI_MAKE_HARDWARE_PTE_USER(&TempPte, PointerPte, ProtectionMask, Page);
}
Pte = InterlockedExchangePte(PointerPte, TempPte.u.Long); Pte = InterlockedExchangePte(PointerPte, TempPte.u.Long);
/* There should not have been anything valid here */ /* There should not have been anything valid here */
@ -710,7 +707,18 @@ MmSetPageProtect(PEPROCESS Process, PVOID Address, ULONG flProtect)
PointerPte = MiAddressToPte(Address); PointerPte = MiAddressToPte(Address);
MI_MAKE_HARDWARE_PTE_USER(&TempPte, PointerPte, ProtectionMask, PFN_FROM_PTE(PointerPte)); /* Sanity check */
ASSERT(PointerPte->u.Hard.Owner == 1);
TempPte.u.Long = 0;
TempPte.u.Hard.PageFrameNumber = PointerPte->u.Hard.PageFrameNumber;
TempPte.u.Long |= MmProtectToPteMask[ProtectionMask];
TempPte.u.Hard.Owner = 1;
/* Only set valid bit if we have to */
if ((ProtectionMask != MM_NOACCESS) && !FlagOn(ProtectionMask, MM_GUARDPAGE))
TempPte.u.Hard.Valid = 1;
/* Keep dirty & accessed bits */ /* Keep dirty & accessed bits */
TempPte.u.Hard.Accessed = PointerPte->u.Hard.Accessed; TempPte.u.Hard.Accessed = PointerPte->u.Hard.Accessed;
TempPte.u.Hard.Dirty = PointerPte->u.Hard.Dirty; TempPte.u.Hard.Dirty = PointerPte->u.Hard.Dirty;

2
ntoskrnl/mm/section.c
View file

@ -1474,7 +1474,7 @@ MmAlterViewAttributes(PMMSUPPORT AddressSpace,
* If we doing COW for this segment then check if the page is * If we doing COW for this segment then check if the page is
* already private. * already private.
*/ */
if (DoCOW && MmIsPagePresent(Process, Address)) if (DoCOW && (MmIsPagePresent(Process, Address) || MmIsDisabledPage(Process, Address)))
{ {
LARGE_INTEGER Offset; LARGE_INTEGER Offset;
ULONG_PTR Entry; ULONG_PTR Entry;