Forwared from a Linux group, are we vulnerable as well? See attached
source code.

-------

Hi folks,

	I'm forwarding something that was posted by a friend to the
Seattle Linux Users mailing list.  FWIW, I tried it on my vanilla P200 as
a regular user and it froze my box solid.  I'm yanking the Pent now for a
Cyrix 6x86 to see if it has the problem also.  I heard a rumor that AMD
K6's were not affected.

thanks,
-bp
--
B. James Phillippe <bryan@Terran.ORG>
UNIX, Linux, networks, C, Perl, Java, etc.
NIC:BJP4 # http://w3.terran.org/~bryan

---------- Forwarded message ----------
Subject: Stops Pentiums dead
Date: Fri, 7 Nov 1997 16:54:46 -0800 (PST)
From: Liem Bahneman <roland@cobaltgroup.com>
To: Linux Mailing List <linux-list@ssc.com>


Horrible opcode bug on the pentiums. I hope none of you are pentium-based
ISPs:

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

--

apparent byte code: vx:cmpxchg

locks up any pentium cpu, even from user-space, on any OS.

yuck.

- liem




============================================================================
Liem Bahneman	                                      roland@cobaltgroup.com
Senior Systems Administrator	  	  http://www.cobaltgroup.com/~roland
The Cobalt Group					 (206) 269-6363 x300
Seattle, Washington					F(206) 269-6350

=========================================================================

-- 
Markus Illenseer