The debian-private mailing list leak, part 1. Volunteers have complained about Blackmail. Lynchings. Character assassination. Defamation. Cyberbullying. Volunteers who gave many years of their lives are picked out at random for cruel social experiments. The former DPL's girlfriend Molly de Blanc is given volunteers to experiment on for her crazy talks. These volunteers never consented to be used like lab rats. We don't either. debian-private can no longer be a safe space for the cabal. Let these monsters have nowhere to hide. Volunteers are not disposable. We stand with the victims.
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Heads up about YAPB (Yet Another Pentium Bug)

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I can say that this did lock up the one Intel Pentium Box I tried it on
but didn't do anything to the AMD or Cyrix systems I've got.

Darren
- -- 
<torin@daft.com> <http://www.daft.com/~torin> <torin@debian.org> <torin@io.com>
Darren Stalder/2608 Second Ave, @282/Seattle, WA 98121-1212/USA/+1-800-921-4996
@ Sysadmin, webweaver, postmaster for hire.  C/Perl/CGI programmer and tutor. @
@		     Make a little hot-tub in your soul.		      @

- ---------- Forwarded message ----------
Date: Fri, 7 Nov 1997 16:04:57 -0500 (EST)
From: Disconnect <dis@sigkill.dyn.ml.org>
Reply-To: fantek@obscure.org
To: fantek@obscure.org
Subject: Something of amusement..

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..at least for those of us who have been advocating anti-Intel clones for
a while..  They have discovered a bug, 4 perfectly legal instructions,
that allows anyone Under Any OS to lock up an Intel Pentium (I not II).
Doesn't matter how the operating system handles it (virtual-86 mode, real,
protected, etc) it will freeze solid.  (Maybe Wintel will keep screwing up
their chips and it'll become WinAMD? ;) ..)

All the appropriate postings are below, including a snippit of source (at
the way way bottom) for anyone who has GCC (ie Linux) and a Pentium and
feels like locking it up...

- - --- Disconnect ---
- - --- Cut Here   ---

Article: 143907 of comp.sys.intel
From: tzs@halcyon.com (Tim Smith)
Newsgroups: comp.os.linux.advocacy,comp.sys.intel
Subject: Re: This code will lock up any P5 machine, even usermode Linux!  (F0 0F C7 C8)

[Added comp.sys.intel]

In article <3462ADCD.135B@noname.com>,  <noname@noname.com> wrote:
>	Check this out.  If you execute F0 0F C7 C8 on a P5 it will lock the
>machine up.  This is true for any operating system including usermode
>Linux.  It's pretty cool.  Basically, the opcodes are an invalid form of
>cmpxchg8b eax with a lock prefix.  Has anyone seen this before?  The
>problem doesn't show itself for the Pentium Pro or Pentium 2.

Cool.  It also works (sic) from V86 mode, so if you want to play around, just
use DOS debug under whatever DOS emulator the OS you are using provides.
Anyone try it on a Pentium MMX?

- - --Tim Smith


Date: 7 Nov 1997 07:17:44 GMT
From: set-usenet-878887265@reality.samiam.org (Sam Trenholme)
Newsgroups: comp.os.linux.advocacy,comp.sys.intel
Subject: F0 0F C7 C8 looks worse than FPIV

>Cool.  It also works (sic) from V86 mode, so if you want to play around, just
>use DOS debug under whatever DOS emulator the OS you are using provides.
>Anyone try it on a Pentium MMX?

This bug looks far worse that FPIV.  Intel will probably be forced to
undergo an expensive recall, although I wonder just how Intel plans on
getting the broken Pentium on my IBM thinkpad fixed.  I like to let
co-workers access my machine when it is hooked up to the network at work,
and will have to now severely restrict any such access.

- - - Sam

- - -------------------------================================---------------
Code snippit - put this into any ANSI C compiler and it just might do
the trick.

	char x [5] = { 0xf0, 0x0f, 0xc7, 0xc8 };
	main () {
	        void (*f)() = x;
	        f();
	}

Enjoy ;)





- - ---
- - -=<Disconnect>=-
|dis@sigkill.dyn.ml.org|      And Remember...
    \dis@fantek.org/           He who controls Purple controls the Universe..
PGP Key available upon Request Or at least the Purple parts!

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