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Date:      Mon, 16 Jun 2008 22:27:40 +0400
From:      Stanislav Sedov <stas@FreeBSD.org>
To:        "Rui Paulo" <rpaulo@FreeBSD.org>
Cc:        current@freebsd.org, Peter Jeremy <peterjeremy@optushome.com.au>, Stanislav Sedov <stas@freebsd.org>, Poul-Henning Kamp <phk@phk.freebsd.dk>, kib@freebsd.org, Coleman Kane <cokane@freebsd.org>
Subject:   Re: cpuctl(formely devcpu) patch test request
Message-ID:  <20080616222740.5cdd9490.stas@FreeBSD.org>
In-Reply-To: <e1309ba60806161110x5f774fcdic2f5c7b2e7bcb83e@mail.gmail.com>
References:  <20080606020927.8d6675e1.stas@FreeBSD.org> <10261.1212703949@critter.freebsd.dk> <20080606025533.8322ee08.stas@FreeBSD.org> <1212758604.1904.33.camel@localhost> <20080615230250.7f3efae4.stas@FreeBSD.org> <1213557999.1816.15.camel@localhost> <20080616204433.48ad9879.stas@FreeBSD.org> <e1309ba60806161110x5f774fcdic2f5c7b2e7bcb83e@mail.gmail.com>

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On Mon, 16 Jun 2008 19:10:17 +0100
"Rui Paulo" <rpaulo@FreeBSD.org> mentioned:

> There's no security issue here.
> If the system administrator is concerned about "security" of cpuctl,
> he/she just has to compile-out cpuctl or remove the module from the
> file system.
>=20

Well, in this case it would be possible to load that again. Setting
a non-zero securelevel or implementing a specific MAC policy might
be a more correct solution. cpuctl(4) won't allow any MSR operations
if securelevel is above zero.

--=20
Stanislav Sedov
ST4096-RIPE

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