Windows System Software -- Consulting, Training, Development -- Unique Expertise, Guaranteed Results


Before Posting...

Please check out the Community Guidelines in the Announcements and Administration Category.

More Info on Driver Writing and Debugging

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:

Unloading a Windows Driver

SteveSelvaSteveSelva Member Posts: 4

I am creating a Network driver using Windows KMDF Driver and Windows Filtering Platform(WFP) API.

While unloading the driver, I should deallocate all the memory allocated by the driver to avoid memory leaks.

I have an object X which gets allocated and deallocated within Driver itself. There is no problem with that object.

I have another object Y which is getting allocated in Driver using ExAllocatePoolWithTag() and I am setting that address in localRedirectContext of FWPS_CONNECT_REQUEST0 struct.

And then I am fetching that data using WSAIoctl and using it in the User-mode application. Should I need to handle the deallocation of object Y. But if I deallocate the object Y, it throws an error in WinDbg, so I assumed that it should not be deallocated.

Am I doing it correct or not?


Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. Sign in or register to get started.

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!
Kernel Debugging 13-17 May 2024 Live, Online
Developing Minifilters 1-5 Apr 2024 Live, Online
Internals & Software Drivers 11-15 Mar 2024 Live, Online
Writing WDF Drivers 20-24 May 2024 Live, Online