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

Home NTFSD

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: https://www.osr.com/osr-learning-library/


BSOD: BAD_POOL_HEADER

Igal_Kroyter-2Igal_Kroyter-2 Member Posts: 30
edited July 2020 in NTFSD

Hi,

during Verifier activation I have tested a few mounting and un-mounting of the FS. The Memory Dump is attached. The function is also attached.

Why the OS does not allow me to release the memory, is there another way to verify that the pointer was properly allocated prior to release? or is it something else?

Comments

  • Scott_Noone_(OSR)Scott_Noone_(OSR) Administrator Posts: 3,494

    Something has corrupted the pool. You're hitting it when you free ffs_super_block down an error path. Maybe freed it twice? Overran the buffer? Too bad the Verifier crash isn't very useful but you need to do some debugging. Try treating it like debugging a heap corruption in user mode.

    -scott
    OSR

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!
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