The free OSR Learning Library has more than 50 articles on a wide variety of topics about writing and debugging device drivers and Minifilters. From introductory level to advanced. All the articles have been recently reviewed and updated, and are written using the clear and definitive style you've come to expect from OSR over the years.
Check out The OSR Learning Library at: https://www.osr.com/osr-learning-library/
On my post IRP_MJ_CREATE callback, I create another handle by FltCreateFileEx2 with FILE_READ_ATTRIBUTES | SYNCHRONIZE, no share and OBJECT_ATTRIBUTES has OBJ_KERNEL_HANDLE.
If I close it just after the FltCreateFileEx2 everything turn well.
If i close it in the pre IRP_MJ_CLOSE callback of the original File, the system keep the file opened, and when I unload my minifilter, the file is released.
when I try !object on the FILE_OBJECT I have HandleCount: 0 PointerCount: 0
|Upcoming OSR Seminars|
|OSR has suspended in-person seminars due to the Covid-19 outbreak. But, don't miss your training! Attend via the internet instead!|
|Internals & Software Drivers||30 Nov 2020||LIVE ONLINE|
|Writing WDF Drivers||7 Dec 2020||LIVE ONLINE|
|Developing Minifilters||Early 2021||LIVE ONLINE|