[PATCH V31 25/25] debugfs: Disable open() when kernel is locked down

Greg KH gregkh at linuxfoundation.org
Wed Mar 27 18:29:47 UTC 2019

On Wed, Mar 27, 2019 at 10:42:18AM -0700, Matthew Garrett wrote:
> On Wed, Mar 27, 2019 at 10:40 AM Andy Lutomirski <luto at kernel.org> wrote:
> > As far as I'm concerned, preventing root from crashing the system
> > should not be a design goal of lockdown at all.  And I think that the
> > "integrity" mode should be as non-annoying as possible, so I think we
> > should allow reading from debugfs.
> I have no horse in this game - I'm happy to bring back the previous
> approach for integrity mode and block reads entirely in
> confidentiality mode, but I'd rather not spend another release cycle
> arguing about it.

I really do not care either way about any of this :)

greg k-h

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