netdev - Re: DoS by cat /proc/net/ip

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Message-ID: <20080308144426.GB3378@ami.dom.local>
Date:	Sat, 8 Mar 2008 15:44:26 +0100
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Denys Fedoryshchenko <denys@...p.net.lb>
Cc:	Krzysztof Oledzki <olel@....pl>, netdev@...r.kernel.org
Subject: Re: DoS by cat /proc/net/ip_conntrack ?

On Sat, Mar 08, 2008 at 04:24:34PM +0200, Denys Fedoryshchenko wrote:
> For me personally, i think must be as a rule, that _READING_ must not hang 
> whole system by consuming all resources (router becoming completely 
> unreachable and blocking all traffic passing thru it). It can hang console, 
> current program, but not crash router.

IMHO you're right, and it's a bug. Only calling this DOS isn't probably
very right if only root can do this, but maybe I'm wrong.

Jarek P.
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