[quote=FreeBSD-SA-05:09.htt.asc]
NOTE: For users that are certain that their environment is not affected
by this vulnerability, such as single-user systems, Hyper-Threading
Technology may be re-enabled by setting the tunable
"machdep.hyperthreading_allowed".
[/quote]
----- Original Message -----
From: "Alex de Kruijff" <[EMAIL PROTECTED]>
On Fri, Jun 10, 2005 at 03:06:51PM -0500, Stephen Montgomery-Smith wrote:
Steven Hartland wrote:
>Have a read /usr/src/UPDATING it explains.
>
It should be in /usr/src/UPDATING, but I don't see it there myself.
I got bitten by the same problem. The other guy who gave
ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-05:09.htt.asc
provided the right answer, but it should be also mentioned in UPDATING.
Now it is. But its a bit vage. (i.e. what is a knob)
20050513: p1 FreeBSD-SA-05:09.htt
Add a knob for disabling/enabling HTT. Default off due to
information
disclosure on multi-user systems.
I assume it can be turned on by
echo 'kern.sched.ipiwakeup.htt2=1' >> /etc/sysctl.conf
--
Alex
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