Subject: Re: Hyper-Threading Vulnerability
From: "Richard F. Rebel" <rrebel@whenu.com>
To: Andi Kleen <ak@muc.de>
Cc: Gabor MICSKO <gmicsko@szintezis.hu>, linux-kernel@vger.kernel.org
In-Reply-To: <m164xnatpt.fsf@muc.de>
References: <1115963481.1723.3.camel@alderaan.trey.hu>
	 <m164xnatpt.fsf@muc.de>
Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-aIwwNgspopsjZyOKqsAK"
Organization: Whenu.com
Date: Fri, 13 May 2005 14:38:03 -0400
Message-Id: <1116009483.4689.803.camel@rebel.corp.whenu.com>
Mime-Version: 1.0
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1203
Lines: 43


--=-aIwwNgspopsjZyOKqsAK
Content-Type: text/plain
Content-Transfer-Encoding: quoted-printable

On Fri, 2005-05-13 at 20:03 +0200, Andi Kleen wrote:
> This is not a kernel problem, but a user space problem. The fix=20
> is to change the user space crypto code to need the same number of cache =
line
> accesses on all keys.=20
>=20
> Disabling HT for this would the totally wrong approach, like throwing
> out the baby with the bath water.
>=20
> -Andi

Why?  It's certainly reasonable to disable it for the time being and
even prudent to do so.

--=20
Richard F. Rebel

cat /dev/null > `tty`

--=-aIwwNgspopsjZyOKqsAK
Content-Type: application/pgp-signature; name=signature.asc
Content-Description: This is a digitally signed message part

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)

iD8DBQBChPQLx1ZaISfnBu0RApFDAJ463Y8gyul28akGqpcbIDv9bD2RiwCePGM4
tz2YQjNnUlrtZ0LKT00eEnE=
=NJs5
-----END PGP SIGNATURE-----

--=-aIwwNgspopsjZyOKqsAK--

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/