linux-kernel - Re: [PATCH 1/2] VM/SELinux: require CAP_SYS_RAWIO for all mmap

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Message-ID: <20090729150612.GF1534@ucw.cz>
Date:	Wed, 29 Jul 2009 17:06:12 +0200
From:	Pavel Machek <pavel@....cz>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Eric Paris <eparis@...hat.com>, linux-kernel@...r.kernel.org,
	selinux@...ho.nsa.gov, linux-security-module@...r.kernel.org,
	sds@...ho.nsa.gov, jmorris@...ei.org, spender@...ecurity.net,
	dwalsh@...hat.com, cl@...ux-foundation.org, arjan@...radead.org,
	kyle@...artin.ca, cpardy@...hat.com, arnd@...db.de
Subject: Re: [PATCH 1/2] VM/SELinux: require CAP_SYS_RAWIO for all
	mmap_zero operations

On Tue 2009-07-21 16:38:13, Alan Cox wrote:
> > turns it off for the whole system when you install WINE.  This patch
> > doesn't change that fact.  All it does is add that requirement to
> > SELinux systems that already exists on non-selinux systems.
> 
> Prior to this an SELinux system could implement sensible security. The
> fact Fedora didn't was paranoia and fear over a bad experience made what
> five years ago ?

OTOH enabling selinux previously only taken your rights away... which
is not the case with min_mmap_addr. Making it consistent seems useful.
								Pavel

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