Subject: Re: Is this kernel fault OK?
To: der Mouse <mouse@Rodents.Montreal.QC.CA>
From: Todd Vierling <firstname.lastname@example.org>
Date: 06/27/2003 09:02:38
On Thu, 26 Jun 2003, der Mouse wrote:
: > No, userland tools should never be able to crash the kernel (other
: > than root deliberately scribbling in kmem or something similar).
: I once tried to define what it is about things like
: dd if=/dev/zero of=/dev/mem
: that exempt them from the "userland should never be able to crash the
: kernel" dictum. I never really got anywhere. Any thoughts?
"Userland should never be able to crash a running kernel except when
accessing kernel memory space or raw filesystem data directly."
This becomes even more strict when securelevel >= 2, of course.
-- Todd Vierling <email@example.com>