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From: Andrew Morton <akpm@osdl.org>
To: Nikita Danilov <Nikita@Namesys.COM>
Cc: linux-kernel@vger.kernel.org, ltp-list@lists.sourceforge.net,
	error27@email.com
Subject: Re: [Announce] Strace Test
Date: Thu, 19 Feb 2004 02:59:39 -0800	[thread overview]
Message-ID: <20040219025939.3cdc52b5.akpm@osdl.org> (raw)
In-Reply-To: <16436.38183.533759.45718@laputa.namesys.com>

Nikita Danilov <Nikita@Namesys.COM> wrote:
>
>  Andrew Morton writes:
>   > Nikita Danilov <Nikita@Namesys.COM> wrote:
>   > >
>   > >  > Strace Test uses a modified version of strace 4.5.1.  
>   > >   > Instead of printing out information about system calls, 
>   > >   > the modified version calls the syscalls with improper 
>   > >   > values.
>   > > 
>   > >  It immediately DoSes kernel by calling sys_sysctl() with huge nlen:
>   > >  printk() consumes all CPU.
>   > 
>   > Something like this?
> 
>  On slow console (serial kgdb) this still would be problematic. I think
>  printk_ratelimit() is needed. But why this loop is needed at all? It
>  seems strange that syscall prints its arguments instead of just
>  returning -EINVAL.

It is kindly telling the user that the sysctl is obsolete.

I'll kill it.

  reply	other threads:[~2004-02-19 10:59 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-02-16  5:22 dan carpenter
2004-02-16  6:59 ` Anton Blanchard
2004-03-11  9:53   ` Chris Wedgwood
2004-02-16 15:46 ` [LTP] " Robert Williamson
2004-02-19 10:07 ` Nikita Danilov
2004-02-19 10:38   ` Andrew Morton
2004-02-19 10:51     ` Nikita Danilov
2004-02-19 10:59       ` Andrew Morton [this message]
2004-02-19 10:29 ` David Weinehall

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