Re: [PATCH v6 2/8] debugfs: prevent access to removed files' private data

[Sasha Levin]

On 05/18/2016 11:01 AM, Nicolai Stange wrote:
> Thanks a million for reporting!
> 
> 1.) Do you have lockdep enabled?

Yup, nothing there.

> 2.) Does this happen before or after userspace init has been spawned,
>     i.e. does the lockup happen at debugfs file creation time or
>     possibly at usage time?

So I looked closer, and it seems to happen after starting syzkaller, which
as far as I know tries to open many different debugfs files.

Is there debug code I can add it that'll help us figure out what's up?


Thanks,
Sasha