Xenix Crash? Trivial...

[Ihnat]

In article <831 at mulga.OZ> of net.unix-wizards, Anthony Tang responds to
my comment in <518 at aicchi.UUCP> :

>>Gosh, you have to go into a program?  I just discovered tonight, while
>>'adb'ing a stripped object (DON'T ask why I would want to do it--object
>>licensees have to do many things a respectable source licensee wouldn't
>>*dream* of), that I can trash the kernel by simply trying to single-step
>>through a system call!

with:

>In the manual of XENIX 1.0 for the AT, it read  : "System calls cannot
>be single-stepped"

Mmmm-hmmmm.  No argument; they (syscalls) shouldn't be.  BUT--should any
random, non-priviliged user--malicious or not--be able to trash the system
with such a trivial mistake?  I think not...oh, well...
-- 
	Dave Ihnat
	Analysts International Corporation
	(312) 882-4673
	ihnp4!aicchi!ignatz