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Fix MmMapHalMemory() not using the ReturnAddress for calculating virtual address
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This commit is contained in:
Rafal Kupiec 2024-05-26 10:50:31 +02:00
parent 4a275b3dec
commit a7c4f6c2aa
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
1 changed files with 4 additions and 4 deletions
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8
xtoskrnl/mm/hlpool.c
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@ -186,14 +186,14 @@ MmMapHalMemory(IN PHYSICAL_ADDRESS PhysicalAddress,
} }
/* Get PTE pointer and advance to next page */ /* Get PTE pointer and advance to next page */
PtePointer = (PHARDWARE_PTE)MmpGetPteAddress(VirtualAddress); PtePointer = (PHARDWARE_PTE)MmpGetPteAddress(ReturnAddress);
VirtualAddress = (PVOID)(ULONG_PTR)VirtualAddress + MM_PAGE_SIZE; ReturnAddress = (PVOID)(ULONG_PTR)ReturnAddress + MM_PAGE_SIZE;
/* Check if PTE is valid */ /* Check if PTE is valid */
if(PtePointer->Valid) if(PtePointer->Valid)
{ {
/* PTE is not available, go to the next one */ /* PTE is not available, go to the next one */
BaseAddress = VirtualAddress; BaseAddress = ReturnAddress;
MappedPages = 0; MappedPages = 0;
continue; continue;
} }
@ -203,7 +203,7 @@ MmMapHalMemory(IN PHYSICAL_ADDRESS PhysicalAddress,
} }
/* Take the actual base address with an offset */ /* Take the actual base address with an offset */
VirtualAddress = (PVOID)(ULONG_PTR)(BaseAddress + PAGE_OFFSET(PhysicalAddress.LowPart)); ReturnAddress = (PVOID)(ULONG_PTR)(BaseAddress + PAGE_OFFSET(PhysicalAddress.LowPart));
/* Check if base address starts at the beginning of the heap */ /* Check if base address starts at the beginning of the heap */
if(BaseAddress == MmpHalHeapStart) if(BaseAddress == MmpHalHeapStart)