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SubjectRe: linux-kernel-digest V1 #922
On Fri, 30 May 1997, Daniel G. Linder wrote:

> >From: "Richard B. Johnson" <root@analogic.com>
> >Date: Thu, 29 May 1997 20:15:59 -0400 (EDT)
> >Subject: 2.1.41 <not SMP>
> >
> >A kernel crash, "Unable to handle NULL Pointer dereference at 000000"...
> >will be caused by::
> >
> ># od -x /dev/kmem
> >
> >I used to be able to __READ__ page zero. I think you can't do that anymore.
> >If so, /dev/kmem should not access the restricted page. Users can crash
> >the machine with simple commands.
> >
> >Cheers,
> > Dick
>
> Not a big point, but your command shows a "#" implying root did this.
> Can a normal user cause a crash, also?
> I'm going to try this on my 2.1.40 box after sending this letter.
>
> Dan

Depends upon the "file" protection. Normally no, don't want users looking
for passwords, etc.


Cheers,
DJ
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Richard B. Johnson
Analogic Corporation
Email : rjohnson@analogic.com, johnson@analogic.com
Penguin : Linux version 2.1.41 on an i586 machine (66.15 BogoMips).
Warning : It's hard to stay on the trailing edge of technology.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-


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