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Fix critical memory corruption bug caused by overwriting active page tables marked as free memory
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This commit is contained in:
Aiken Harris
2026-03-12 19:02:58 +01:00
parent 5fe0740c2e
commit 21b3b269a7
8 changed files with 304 additions and 156 deletions
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8
boot/xtldr/modules/xtos_o/includes/xtos.hh
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@@ -38,6 +38,7 @@ class Xtos
IN PVOID PhysicalAddress,
IN UINT NumberOfPages,
IN LOADER_MEMORY_TYPE MemoryType);
STATIC XTCDECL EFI_STATUS BuildPageMap(IN PXTBL_PAGE_MAPPING PageMap);
STATIC XTCDECL LOADER_MEMORY_TYPE ConvertEfiMemoryType(IN EFI_MEMORY_TYPE EfiMemoryType);
STATIC XTCDECL BOOLEAN DetermineMappingStrategy();
STATIC XTCDECL ULONG DeterminePagingLevel(IN CONST PWCHAR Parameters);
@@ -47,10 +48,13 @@ class Xtos
IN PULONG_PTR FrameBufferSize,
IN PXTBL_FRAMEBUFFER_MODE_INFORMATION FrameBufferModeInfo);
STATIC XTCDECL EFI_STATUS GetMemoryDescriptorList(IN PXTBL_PAGE_MAPPING PageMap,
IN PVOID *VirtualAddress,
IN EFI_PHYSICAL_ADDRESS PhysicalBase,
IN PVOID VirtualBase,
OUT PLIST_ENTRY MemoryDescriptorList);
STATIC XTCDECL EFI_STATUS GetSystemResourcesList(IN PXTBL_PAGE_MAPPING PageMap,
IN PVOID *VirtualAddress,
IN EFI_PHYSICAL_ADDRESS PhysicalBase,
IN PVOID VirtualBase,
IN PVOID FrameBufferVirtualBase,
OUT PLIST_ENTRY SystemResourcesList);
STATIC XTCDECL EFI_STATUS GetVirtualAddress(IN PLIST_ENTRY MemoryMappings,
IN PVOID PhysicalAddress,