Re: local DDOS? Kernel panic when accessing /proc/ioports

[Martin Loschwitz <madkiss@madkiss.org>]

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On Fri, Aug 05, 2005 at 12:50:56PM -0700, Chris Wright wrote:
> * Martin Loschwitz (madkiss@madkiss.org) wrote:
> > I just ran into the following problem: Having updated my box to 2.6.12.3, 
> > I tried to start YaST2 and noticed a kernel panic (see below). Some quick
> > debugging brought the result that the kernel crashes while some user (not
> > even root ...) tries to access /proc/ioports. Is this a known problem and
> > if so, is a fix available?
> 
> First I've heard of it.  I can't trigger here with simple cat
> /proc/ioports.  Must be specific to your setup.  What was the last
> working kernel, and what's that ioport output look like?
> 

The situation in this case is somewhat obscene ... Originally, I had exactly
this problem while using the Knoppix standard kernel (2.6.11 vanilla SMP). I
then went to compile 2.6.12.3, also with SMP, and it showed exactly the same
problem. I disable SMP, tried again -- voila, it worked.

The kernel that I am encountering this error again now is 2.6.12.3 -- without
SMP or whatsoever. I'm just out of ideas on how to fix it this time.

> thanks,
> -chris

-- 
  .''`.   Martin Loschwitz           Debian GNU/Linux developer
 : :'  :  madkiss@madkiss.org        madkiss@debian.org
 `. `'`   http://www.madkiss.org/    people.debian.org/~madkiss/
   `-     Use Debian GNU/Linux 3.0!  See http://www.debian.org/

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