linux-kernel - Re: [Devel] [patch i2o 5/6] i2o

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Date:	Wed, 16 May 2007 02:27:01 -0700
From:	Greg KH <greg@...ah.com>
To:	Vasily Averin <vvs@...ru>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	devel@...nvz.org, Markus Lidel <Markus.Lidel@...dowconnect.com>
Subject: Re: [Devel] [patch i2o 5/6] i2o_proc files permission

On Tue, May 15, 2007 at 04:59:49PM +0400, Vasily Averin wrote:
> I would add:
> I've reported about this issue some time ago to security@...nel.org
> How this lockup can be reproduced:
> - boot the kernel,
> - load i2o_proc module
> - login as user and read all entries in /proc/i2o/ directory
> 
> My testnode hangs when I try to read any file from /proc/i2o/iop0/030/
> directory: I have the shell prompt and even can try to start any new command
> which hangs due exec is not works.
> Node is pingable, but I cannot login to it nor via ssh neither from local
> console. Magic Sysrq keys are works. Kernel space software watchdog module
> works OK. But all the new commnds hangs, looks like i2o controller is in coma.
> 
> Greg KH wrote:
> And I'd classify this a "low" security issue, as you have to be root to
> load the i2o_proc module, and I doubt that the distros automatically
> load it.

Yeah, I said it as I didn't see a "simple" way to fix it at the time.
If you have solved this now with this patch, I have no objection to it.

thanks,

greg k-h
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