What is cmpxchg8b.com and why would I trust this "harmless" demonstration not to root my machine as well as running calc.exe? Edit: Well, the link is from http

What is cmpxchg8b.com and why would I trust this "harmless" demonstration not to root my machine as well as running calc.exe? Edit: Well, the link is from http://seclists.org/fulldisclosure/2010/Apr/119 http://seclists.org/fulldisclosure/2010/Apr/119