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[NTOS:MM:X64] On x64 allocate a VAD for the shared user page

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This commit is contained in:
Timo Kreuzer 2020-03-07 19:35:15 +01:00
parent a5d47ff72b
commit 48d1bd2c88
1 changed files with 66 additions and 0 deletions
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66
ntoskrnl/mm/ARM3/procsup.c
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@ -840,6 +840,62 @@ MmCreateTeb(IN PEPROCESS Process,
return Status;
}
#ifdef _M_AMD64
static
NTSTATUS
MiInsertSharedUserPageVad(VOID)
{
PMMVAD_LONG Vad;
ULONG_PTR BaseAddress;
NTSTATUS Status;
/* Allocate a VAD */
Vad = ExAllocatePoolWithTag(NonPagedPool, sizeof(MMVAD_LONG), 'ldaV');
if (Vad == NULL)
{
DPRINT1("Failed to allocate VAD for shared user page\n");
return STATUS_INSUFFICIENT_RESOURCES;
}
/* Setup the primary flags with the size, and make it private, RO */
Vad->u.LongFlags = 0;
Vad->u.VadFlags.CommitCharge = 0;
Vad->u.VadFlags.NoChange = TRUE;
Vad->u.VadFlags.VadType = VadNone;
Vad->u.VadFlags.MemCommit = FALSE;
Vad->u.VadFlags.Protection = MM_READONLY;
Vad->u.VadFlags.PrivateMemory = TRUE;
Vad->u1.Parent = NULL;
/* Setup the secondary flags to make it a secured, readonly, long VAD */
Vad->u2.LongFlags2 = 0;
Vad->u2.VadFlags2.OneSecured = TRUE;
Vad->u2.VadFlags2.LongVad = TRUE;
Vad->u2.VadFlags2.ReadOnly = FALSE;
Vad->ControlArea = NULL; // For Memory-Area hack
Vad->FirstPrototypePte = NULL;
/* Insert it into the process VAD table */
BaseAddress = MM_SHARED_USER_DATA_VA;
Status = MiInsertVadEx((PMMVAD)Vad,
&BaseAddress,
PAGE_SIZE,
(ULONG_PTR)MM_HIGHEST_VAD_ADDRESS,
PAGE_SIZE,
MEM_TOP_DOWN);
if (!NT_SUCCESS(Status))
{
DPRINT1("Failed to insert shared user VAD\n");
ExFreePoolWithTag(Vad, 'ldaV');
return Status;
}
/* Success */
return STATUS_SUCCESS;
}
#endif
VOID
NTAPI
MiInitializeWorkingSetList(IN PEPROCESS CurrentProcess)
@ -957,6 +1013,16 @@ MmInitializeProcessAddressSpace(IN PEPROCESS Process,
/* Release PFN lock */
MiReleasePfnLock(OldIrql);
#ifdef _M_AMD64
/* On x64 we need a VAD for the shared user page */
Status = MiInsertSharedUserPageVad();
if (!NT_SUCCESS(Status))
{
DPRINT1("MiCreateSharedUserPageVad() failed: 0x%lx\n", Status);
return Status;
}
#endif
/* Check if there's a Section Object */
if (SectionObject)
{