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[FSTUB] Fix bugs from 8d2fe54188

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The buffer is now PUCHAR or PVOID everywhere
This commit is contained in:
Victor Perevertkin 2020-12-07 19:50:51 +03:00
parent 8d2fe54188
commit 29615feeb6
No known key found for this signature in database
GPG key ID: C750B7222E9C7830
3 changed files with 17 additions and 18 deletions
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14
ntoskrnl/fstub/disksup.c
View file

@ -1704,7 +1704,7 @@ xHalExamineMBR(IN PDEVICE_OBJECT DeviceObject,
if (NT_SUCCESS(Status))
{
/* Validate the MBR Signature */
if (((PUSHORT)Buffer)[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
if (*(PUINT16)&Buffer[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
{
/* Failed */
ExFreePoolWithTag(Buffer, TAG_FILE_SYSTEM);
@ -1885,7 +1885,7 @@ xHalIoReadPartitionTable(IN PDEVICE_OBJECT DeviceObject,
if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;
/* Make sure this is a valid MBR */
if (((PUSHORT)Buffer)[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
if (*(PUINT16)&Buffer[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
{
/* It's not, fail */
DPRINT1("FSTUB: (IoReadPartitionTable) No 0xaa55 found in "
@ -2279,7 +2279,7 @@ xHalIoSetPartitionInformation(IN PDEVICE_OBJECT DeviceObject,
if (IsEzDrive && (Offset.QuadPart == 512)) Offset.QuadPart = 0;
/* Make sure this is a valid MBR */
if (((PUSHORT)Buffer)[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
if (*(PUINT16)&Buffer[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
{
/* It's not, fail */
Status = STATUS_BAD_MASTER_BOOT_RECORD;
@ -2395,7 +2395,7 @@ xHalIoWritePartitionTable(IN PDEVICE_OBJECT DeviceObject,
PIRP Irp;
NTSTATUS Status = STATUS_SUCCESS;
ULONG BufferSize;
PUSHORT Buffer;
PUCHAR Buffer;
PPTE Entry;
PPARTITION_TABLE PartitionTable;
LARGE_INTEGER Offset, NextOffset, ExtendedOffset, SectorOffset;
@ -2515,7 +2515,7 @@ xHalIoWritePartitionTable(IN PDEVICE_OBJECT DeviceObject,
if (!IsSuperFloppy)
{
/* Set the boot record signature */
((PUSHORT)Buffer)[BOOT_SIGNATURE_OFFSET] = BOOT_RECORD_SIGNATURE;
*(PUINT16)&Buffer[BOOT_SIGNATURE_OFFSET] = BOOT_RECORD_SIGNATURE;
/* By default, don't require a rewrite */
DoRewrite = FALSE;
@ -2524,10 +2524,10 @@ xHalIoWritePartitionTable(IN PDEVICE_OBJECT DeviceObject,
if (!Offset.QuadPart)
{
/* Check if the signature doesn't match */
if (*(PUINT32)&Buffer[PARTITION_TABLE_OFFSET] != PartitionBuffer->Signature)
if (*(PUINT32)&Buffer[DISK_SIGNATURE_OFFSET] != PartitionBuffer->Signature)
{
/* Then write the signature and now we need a rewrite */
*(PUINT32)&Buffer[PARTITION_TABLE_OFFSET] = PartitionBuffer->Signature;
*(PUINT32)&Buffer[DISK_SIGNATURE_OFFSET] = PartitionBuffer->Signature;
DoRewrite = TRUE;
}
}

19
ntoskrnl/fstub/fstubex.c
View file

@ -19,7 +19,7 @@ typedef struct _DISK_INFORMATION
PDEVICE_OBJECT DeviceObject;
ULONG SectorSize;
DISK_GEOMETRY_EX DiskGeometry;
PUSHORT Buffer;
PUCHAR Buffer;
ULONGLONG SectorCount;
} DISK_INFORMATION, *PDISK_INFORMATION;
@ -122,7 +122,7 @@ NTAPI
FstubReadSector(IN PDEVICE_OBJECT DeviceObject,
IN ULONG SectorSize,
IN ULONGLONG StartingSector OPTIONAL,
OUT PUSHORT Buffer
OUT PVOID Buffer
);
NTSTATUS
@ -158,7 +158,7 @@ NTAPI
FstubWriteSector(IN PDEVICE_OBJECT DeviceObject,
IN ULONG SectorSize,
IN ULONGLONG StartingSector OPTIONAL,
IN PUSHORT Buffer
IN PVOID Buffer
);
VOID
@ -673,10 +673,9 @@ FstubDetectPartitionStyle(IN PDISK_INFORMATION Disk,
}
/* Get the partition descriptor array */
PartitionDescriptor = (PPARTITION_DESCRIPTOR)
&(Disk->Buffer[PARTITION_TABLE_OFFSET / sizeof(Disk->Buffer[0])]);
PartitionDescriptor = (PPARTITION_DESCRIPTOR)&Disk->Buffer[PARTITION_TABLE_OFFSET];
/* If we have not the 0xAA55 then it's raw partition */
if (Disk->Buffer[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
if (*(PUINT16)&Disk->Buffer[BOOT_SIGNATURE_OFFSET] != BOOT_RECORD_SIGNATURE)
{
*PartitionStyle = PARTITION_STYLE_RAW;
}
@ -865,7 +864,7 @@ FstubReadHeaderEFI(IN PDISK_INFORMATION Disk,
/* Then zero the one in EFI header. This is needed to compute header checksum */
EFIHeader->HeaderCRC32 = 0;
/* Compute header checksum and compare with the one present in partition table */
if (RtlComputeCrc32(0, (PUCHAR)Disk->Buffer, sizeof(EFI_PARTITION_HEADER)) != HeaderCRC32)
if (RtlComputeCrc32(0, Disk->Buffer, sizeof(EFI_PARTITION_HEADER)) != HeaderCRC32)
{
DPRINT("EFI::Not matching header checksum!\n");
return STATUS_DISK_CORRUPT_ERROR;
@ -1173,7 +1172,7 @@ NTAPI
FstubReadSector(IN PDEVICE_OBJECT DeviceObject,
IN ULONG SectorSize,
IN ULONGLONG StartingSector OPTIONAL,
OUT PUSHORT Buffer)
OUT PVOID Buffer)
{
PIRP Irp;
KEVENT Event;
@ -1721,7 +1720,7 @@ NTAPI
FstubWriteSector(IN PDEVICE_OBJECT DeviceObject,
IN ULONG SectorSize,
IN ULONGLONG StartingSector OPTIONAL,
IN PUSHORT Buffer)
IN PVOID Buffer)
{
PIRP Irp;
KEVENT Event;
@ -2220,7 +2219,7 @@ IoReadDiskSignature(IN PDEVICE_OBJECT DeviceObject,
else
{
/* Compute MBR checksum */
for (i = 0, CheckSum = 0; i < BytesPerSector / sizeof(UINT32); i++)
for (i = 0, CheckSum = 0; i < 512; i += sizeof(INT32))
{
CheckSum += *(PUINT32)&Buffer[i];
}

2
ntoskrnl/include/internal/hal.h
View file

@ -242,7 +242,7 @@ xKdUnmapVirtualAddress(
//
#define DISK_SIGNATURE_OFFSET 0x1B8
#define PARTITION_TABLE_OFFSET 0x1BE
#define BOOT_SIGNATURE_OFFSET ((0x200 / sizeof(INT16)) - 1)
#define BOOT_SIGNATURE_OFFSET (0x200 - 2)
#define BOOT_RECORD_SIGNATURE 0xAA55
#define NUM_PARTITION_TABLE_ENTRIES 4