linux-kernel - Re: [PATCH v6 0/3] security: Yama LSM

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Message-ID: <CAGXu5jJ4h+uCF50DqbLe1m6CRr_Mw3pWq4mEm8nRtDPKV9C2Rg@mail.gmail.com>
Date:	Fri, 18 Nov 2011 13:39:38 -0800
From:	Kees Cook <keescook@...omium.org>
To:	oleg@...hat.com
Cc:	linux-kernel@...r.kernel.org,
	linux-security-module@...r.kernel.org,
	James Morris <jmorris@...ei.org>, roland@...k.frob.com
Subject: Re: [PATCH v6 0/3] security: Yama LSM

On Thu, Nov 17, 2011 at 8:17 PM, James Morris <jmorris@...ei.org> wrote:
> On Wed, 26 Oct 2011, Kees Cook wrote:
>
>> As discussed at the Linux Security Summit, I'm resubmitting this
>> code. As an LSM, it has coherent policy around expanding specific DAC
>> behaviors. There is no need for it to be a full-blown MAC, since it is
>> not intended to be one, but rather to be a simplified expansion to DAC,
>> with system-wide knobs. See the specific patches for details...
>
> In principle, Yama can be merged, however there are features with
> unresolved upstream naks:
>
> - Handling symlinks in sticky directories
> - The ptrace tracker
>
> These still need to be resolved.

Oleg, Roland,

Do you have any objection to my LSM performing ptrace restrictions?
It's entirely self-contained, and all the major upstream crash
handlers are already using the prctl() interface it uses to declare
ptrace attach relationships.

Thanks,

-Kees

-- 
Kees Cook
ChromeOS Security
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