linux-kernel - Re: [PATCH 24/24] debugfs: Restrict debugfs when the kernel is locked down

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Message-ID: <20180510110113.GA6977@amd>
Date:   Thu, 10 May 2018 13:01:13 +0200
From:   Pavel Machek <pavel@....cz>
To:     David Howells <dhowells@...hat.com>
Cc:     torvalds@...ux-foundation.org, linux-man@...r.kernel.org,
        linux-api@...r.kernel.org, jmorris@...ei.org,
        linux-kernel@...r.kernel.org, linux-security-module@...r.kernel.org
Subject: Re: [PATCH 24/24] debugfs: Restrict debugfs when the kernel is
 locked down

On Thu 2018-04-19 15:35:47, David Howells wrote:
> Pavel Machek <pavel@....cz> wrote:
> 
> > >  (1) chmod and chown are disallowed on debugfs objects (though the root dir
> > >      can be modified by mount and remount, but I'm not worried about that).
> > 
> > This has nothing to do with the lockdown goals, right? I find chown of
> > such files quite nice, to allow debugging without doing sudo all the time.
> 
> It allows someone to give everyone access to files that should perhaps only be
> accessible by root.  Besides, if you disable lockdown then you can do this if
> you want.

As I said this has nothing to do with lockdown, so does not belong in
this series. (And besides, it is bad idea.)

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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