linux-kernel - Re: [rfc 3/3] prctl: Add PR_SET_MM codes to tune up mm

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Date:	Wed, 30 Nov 2011 00:47:35 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Kees Cook <keescook@...omium.org>
Cc:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>, Andrew Vagin <avagin@...nvz.org>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	Pavel Emelyanov <xemul@...allels.com>,
	Vasiliy Kulikov <segoon@...nwall.com>
Subject: Re: [rfc 3/3] prctl: Add PR_SET_MM codes to tune up mm_struct entires

On Tue, Nov 29, 2011 at 12:40:57PM -0800, Kees Cook wrote:
> 
> Right, if you verify that the addresses are actually inside valid
> userspace vmas, that is likely to be right, though there are probably
> other things I haven't thought of. The trouble is avoiding vdso, stack
> guard page, vsyscall, and anything else that isn't meant for the mm to
> have direct access to.

Yeah, these service area should not be messed up, I'll add such tests.
Thanks a lot for comments, Kees!
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