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/
I have a a minifilter-driver and in the DriverEntry() I am calling IoCreateDevice() giving it a name in a form of \Device\Blabla. After this I create a symbolic link and make the device accessible for UM. This device is later used for UM --> KM communication, mainly for sending IOCTLs.
There is one thing I am trying to achieve additionally:
What if I wanted to obtain a device handle but in the kernel mode? So i am calling ZwCreateFile or NtCreateFile using different device name formats. But this always fails. So far I have tried:
Also: ObOpenObjectByPointer() worked on the device object but the handle I got was bogus.
Any help would be appreciated.
|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!|
|Writing WDF Drivers||12 September 2022||Live, Online|
|Internals & Software Drivers||23 October 2022||Live, Online|
|Kernel Debugging||14 November 2022||Live, Online|
|Developing Minifilters||5 December 2022||Live, Online|