Re: [uml-devel] mm->dumpable issue (was: Re: /proc/mm patches)

[Michael Richardson <mcr@marajade.sandelman.ottawa.on.ca>]

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Paolo, I applied the fix-dumpable-handling patch to 2.4.27, specifically
the patch to proc_mm.c. The ptrace.c patch didn't apply to 2.4.27,
probably due to 2.4/2.6 differences, but I realized that this just
fixed ptrace to be safe.

%ps ax | grep linux
  778 pts/1    S+     0:02 /0i/sandboxes/pool/aggr/east/linux 
  780 pts/1    T+     0:00 [linux]
  785 pts/1    S+     0:00 /0i/sandboxes/pool/aggr/east/linux 
  786 pts/1    S+     0:00 /0i/sandboxes/pool/aggr/east/linux 
  787 pts/1    S+     0:00 /0i/sandboxes/pool/aggr/east/linux 

gimli-[/0i/sandboxes/aggr] mcr 1011 %ls -l /proc/{778,780,785,786,787}/environ
- -r--------  1 mcr mcr 0 Nov 20 14:57 /proc/778/environ
- -r--------  1 mcr mcr 0 Nov 20 14:57 /proc/780/environ
- -r--------  1 mcr mcr 0 Nov 20 14:57 /proc/785/environ
- -r--------  1 mcr mcr 0 Nov 20 14:57 /proc/786/environ
- -r--------  1 mcr mcr 0 Nov 20 14:57 /proc/787/environ

So, I think that this worked to fix the ownership.
Whether or not it is safe, I can't say. But, at least, you know that
it has a positive effect.

]       ON HUMILITY: to err is human. To moo, bovine.           |  firewalls  [
]   Michael Richardson,    Xelerance Corporation, Ottawa, ON    |net architect[
] mcr@xelerance.com      http://www.sandelman.ottawa.on.ca/mcr/ |device driver[
] panic("Just another Debian GNU/Linux using, kernel hacking, security guy"); [
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