From: "Dmitry V. Levin" <ldv@alt-linux.org>
To: Linux-Mandrake RE Mailing List <mandrake-russian@altlinux.ru>
Subject: Re: [mdk-re] SH
Date: Thu May 3 13:41:00 2001
Message-ID: <20010503134847.F1020@ldv.office.alt-linux.org> (raw)
In-Reply-To: <OFE7862F16.1FC86284-ONC6256A3D.00239AF0@novosoft.ru>; from denf@novosoft.ru on Sun, Apr 29, 2001 at 01:41:51PM +0700
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On Sun, Apr 29, 2001 at 01:41:51PM +0700, denf@novosoft.ru wrote:
>
> >> >Это баг или фича?
> >> >
> >> >#!/bin/sh
> >> >$0 &
> >> >exec $0
> >> фича. fork-bomb называется.
> >
> >Так значит вообще любой локальный пользователь может завалить машину?
> >Ну и ну я такого не ожидал от многопользовательской операционной системы.
> >Нужно же покрайней мере оставлять для рута пару свободных процесов.
> >И то не решение.
> 1. руту отводится несколько последних процессов ( 4, кажется, обычно )
В наших ядрах - 62 (точнее см. в файле /usr/include/linux/tasks.h).
> 2. шелл у юзера - уже большая дыра в безопасности
> 3. man bash на предмет ulimit
См. /etc/security/limits.conf на тему штатного метода настройки лимитов
для пользователей.
Regards,
Dmitry
+-------------------------------------------------------------------------+
Dmitry V. Levin mailto://ldv@alt-linux.org
ALT Linux Team http://www.altlinux.ru/
Fandra Project http://www.fandra.org/
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UNIX is user friendly. It's just very selective about who its friends are.
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next prev parent reply other threads:[~2001-05-03 13:41 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-29 10:40 denf
2001-05-03 13:41 ` Dmitry V. Levin [this message]
2001-05-07 8:51 ` Maxim Savrilov
2001-05-07 10:22 ` Dmitry V. Levin
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