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Isolation filters are manufactured using mini filters. After fixing a bug in which the file size changes according to the PageSize when saving, this time, a notification that the file has been changed externally appears every time the file is saved.
File write time changes after IRP_MJ_WRITE and Paging I/O, but there is no trace of additional change in file write time since then. I don't know why the process perceives that it has changed externally.
full IRP list was attched.
my code : https://github.com/jgh0721/Win-IO-Monitor , 0afd16a204ab8bb2e6950f580cd37f3ea9518895
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