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[NTOSKRNL] When checking for byte offset alignment, tolerate some magic values

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This commit is contained in:
Pierre Schweitzer 2018-10-04 07:53:12 +02:00
parent fd33402104
commit 1bd25c5c24
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1 changed files with 9 additions and 3 deletions
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12
ntoskrnl/io/iomgr/iofunc.c
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@ -3656,9 +3656,15 @@ NtWriteFile(IN HANDLE FileHandle,
if ((DeviceObject->SectorSize != 0) &&
(ByteOffset->QuadPart % DeviceObject->SectorSize != 0))
{
/* Release the file object and and fail */
ObDereferenceObject(FileObject);
return STATUS_INVALID_PARAMETER;
/* Only if that's not specific values for synchronous IO */
if ((ByteOffset->QuadPart != FILE_WRITE_TO_END_OF_FILE) &&
(ByteOffset->QuadPart != FILE_USE_FILE_POINTER_POSITION ||
!BooleanFlagOn(FileObject->Flags, FO_SYNCHRONOUS_IO)))
{
/* Release the file object and and fail */
ObDereferenceObject(FileObject);
return STATUS_INVALID_PARAMETER;
}
}
}
}