linux-kernel - Re: [patch 1/2] c/r: prctl: Add ability to set new mm_struct::exe

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Message-ID: <CAFLxGvwu_T04CYsUd33ZxuumvJ9hBHD+fGzS-ubS831jV8wqyg@mail.gmail.com>
Date:	Tue, 20 Mar 2012 00:23:06 +0100
From:	richard -rw- weinberger <richard.weinberger@...il.com>
To:	Cyrill Gorcunov <gorcunov@...nvz.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Oleg Nesterov <oleg@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Pavel Emelyanov <xemul@...allels.com>,
	Kees Cook <keescook@...omium.org>, Tejun Heo <tj@...nel.org>,
	Matt Helsley <matthltc@...ibm.com>
Subject: Re: [patch 1/2] c/r: prctl: Add ability to set new mm_struct::exe_file

On Tue, Mar 20, 2012 at 12:17 AM, Cyrill Gorcunov <gorcunov@...nvz.org> wrote:
>> So, why makes that one-short fashion the feature more secure?
>> Let the user change the exe symlink as often as he wants.
>> From a security point of view the exe symlink is anyway useless.
>
> Maybe better to call it 'predictable' then rather than 'secure'?

I'd say one-short makes it less confusing. :-)

-- 
Thanks,
//richard
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