Subject: Re: protecting against user changes in sigreturn()
To: None <brezak@ch.hp.com, port-i386@sun-lamp.cs.berkeley.edu>
From: Charles Hannum <mycroft>
List: port-i386
Date: 12/31/1993 17:54:55
I believe this is now the fourth time you've proposed such a `solution',
and the fourth time I'm going to tell you why it's not adequate.

Very simple, really.  You're thinking only of the case of trying to load
a more privileged selector.  That's all fine and dandy.  But if the user
tries to load a totally bogus selector, you still get a trap inside the
kernel.


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