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[NTOSKRNL] Add a few asserts when mapping a VACB in kernel space

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Also, reset VACB content when returning it to the lookaside list

CORE-14478
This commit is contained in:
Pierre Schweitzer 2018-03-24 18:02:20 +01:00
parent 8aff426af0
commit dea9c291ab
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GPG key ID: 7545556C3D585B0B
1 changed files with 11 additions and 1 deletions
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12
ntoskrnl/cc/view.c
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@ -624,17 +624,20 @@ CcRosMapVacbInKernelSpace(
ULONG i;
NTSTATUS Status;
ULONG_PTR NumberOfPages;
PVOID BaseAddress = NULL;
/* Create a memory area. */
MmLockAddressSpace(MmGetKernelAddressSpace());
Status = MmCreateMemoryArea(MmGetKernelAddressSpace(),
0, // nothing checks for VACB mareas, so set to 0
&Vacb->BaseAddress,
&BaseAddress,
VACB_MAPPING_GRANULARITY,
PAGE_READWRITE,
(PMEMORY_AREA*)&Vacb->MemoryArea,
0,
PAGE_SIZE);
ASSERT(Vacb->BaseAddress == NULL);
Vacb->BaseAddress = BaseAddress;
MmUnlockAddressSpace(MmGetKernelAddressSpace());
if (!NT_SUCCESS(Status))
{
@ -644,6 +647,7 @@ CcRosMapVacbInKernelSpace(
ASSERT(((ULONG_PTR)Vacb->BaseAddress % PAGE_SIZE) == 0);
ASSERT((ULONG_PTR)Vacb->BaseAddress > (ULONG_PTR)MmSystemRangeStart);
ASSERT((ULONG_PTR)Vacb->BaseAddress + VACB_MAPPING_GRANULARITY - 1 > (ULONG_PTR)MmSystemRangeStart);
/* Create a virtual mapping for this memory area */
NumberOfPages = BYTES_TO_PAGES(VACB_MAPPING_GRANULARITY);
@ -659,6 +663,11 @@ CcRosMapVacbInKernelSpace(
KeBugCheck(MEMORY_MANAGEMENT);
}
ASSERT(BaseAddress == Vacb->BaseAddress);
ASSERT(i * PAGE_SIZE < VACB_MAPPING_GRANULARITY);
ASSERT((ULONG_PTR)Vacb->BaseAddress + (i * PAGE_SIZE) >= (ULONG_PTR)BaseAddress);
ASSERT((ULONG_PTR)Vacb->BaseAddress + (i * PAGE_SIZE) > (ULONG_PTR)MmSystemRangeStart);
Status = MmCreateVirtualMapping(NULL,
(PVOID)((ULONG_PTR)Vacb->BaseAddress + (i * PAGE_SIZE)),
PAGE_READWRITE,
@ -951,6 +960,7 @@ CcRosInternalFreeVacb (
ASSERT(Vacb->PinCount == 0);
ASSERT(Vacb->ReferenceCount == 0);
RtlFillMemory(Vacb, sizeof(Vacb), 0xfd);
ExFreeToNPagedLookasideList(&VacbLookasideList, Vacb);
return STATUS_SUCCESS;
}