Bugtraq mailing list archives
Re: WARNING: Linux Intel Pentium Bug
From: seifried () LEXIE V-WAVE COM (Kurt Seifried)
Date: Fri, 7 Nov 1997 11:55:07 -0700
This Program was distributed in the newsgroups and on irc so i thought i would post it here.... (prog attached) 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
Ran it on my P166, kaboom, ran it on my new P166MMX, kaboom. I guess that would be a yes. This is kind of scary, is there any possibility of a kernel patch that can take care of this? -seifried
Current thread:
- Re: Intel Pentium Bug, (continued)
- Re: Intel Pentium Bug Dean Gaudet (Nov 07)
- Re: Intel Pentium Bug Colin Jenkins (Nov 07)
- Re: Intel Pentium Bug George Imburgia (Nov 07)
- Re: Intel Pentium Bug Travis Hassloch (Nov 11)
- Re: WARNING: Linux Intel Pentium Bug Alan Cox (Nov 08)
- Re: WARNING: Linux Intel Pentium Bug Roger Espel Llima (Nov 09)
- solaris (fwd) Rob Hagopian (Nov 09)
- Re: solaris (fwd) Corey Lindsly (Nov 09)
- Re: solaris (fwd) James Lockwood (Nov 09)
- Re: solaris (fwd) Dalvenjah FoxFire (Nov 09)
- Re: WARNING: Linux Intel Pentium Bug Kurt Seifried (Nov 07)
- Re: WARNING: Linux Intel Pentium Bug Tim Newsham (Nov 07)
- Re: WARNING: Linux Intel Pentium Bug Alan Cox (Nov 08)
- Outdated DNS and syslog Aaron Schultz (Nov 07)