linux-kernel - Re: [kernel-hardening] Re: [PATCH v3 1/2] modules:capabilities: automatic module loading restriction

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Message-ID: <CAGXu5j+L9=tGH2xCKJ53NDYRM8PVVYyC2R8w7uahBO88cftZNg@mail.gmail.com>
Date:   Thu, 20 Apr 2017 14:28:59 -0700
From:   Kees Cook <keescook@...omium.org>
To:     Djalal Harouni <tixxdz@...il.com>
Cc:     Ben Hutchings <ben@...adent.org.uk>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Andy Lutomirski <luto@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        "kernel-hardening@...ts.openwall.com" 
        <kernel-hardening@...ts.openwall.com>,
        LSM List <linux-security-module@...r.kernel.org>,
        Linux API <linux-api@...r.kernel.org>,
        Dongsu Park <dpark@...teo.net>,
        Casey Schaufler <casey@...aufler-ca.com>,
        James Morris <james.l.morris@...cle.com>,
        Paul Moore <paul@...l-moore.com>,
        Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jonathan Corbet <corbet@....net>, Jessica Yu <jeyu@...hat.com>,
        Rusty Russell <rusty@...tcorp.com.au>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Ingo Molnar <mingo@...nel.org>, Zendyani <zendyani@...il.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [kernel-hardening] Re: [PATCH v3 1/2] modules:capabilities:
 automatic module loading restriction

On Thu, Apr 20, 2017 at 1:39 PM, Djalal Harouni <tixxdz@...il.com> wrote:
> On Thu, Apr 20, 2017 at 5:02 PM, Ben Hutchings <ben@...adent.org.uk> wrote:
>> On Thu, 2017-04-20 at 14:44 +0200, Djalal Harouni wrote:
>>> > On Thu, Apr 20, 2017 at 4:22 AM, Ben Hutchings <ben@...adent.org.uk> wrote:
>>> > On Thu, 2017-04-20 at 00:20 +0200, Djalal Harouni wrote:
>>> > [...]
> [...]
>>> modules_disabled is too restrictive and once set it can't be changed,
>>> maybe that's why not all users use it.
>>>
>>> With modules_disabled=0 and modules_autoload=2
>> [...]
>>
>> Hmm, OK.  How about naming this modules_autoload_mode, then, so that
>> it's obviously not a boolean?
>
> Yes that's fine by me, kees already suggested to rename it to
> "modules_autoload" I can change it to that if it's the best
> suggestion!

That's fine by me.

-Kees

-- 
Kees Cook
Pixel Security