netdev - Re: tty_register_device NULL pointer dereference in 2.6.31-rc4

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Message-ID: <20090725115011.7ddf8d00@lxorguk.ukuu.org.uk>
Date:	Sat, 25 Jul 2009 11:50:11 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Oliver Hartkopp <oliver@...tkopp.net>
Cc:	Marcel Holtmann <marcel@...tmann.org>,
	Linux Netdev List <netdev@...r.kernel.org>,
	linux-bluetooth@...r.kernel.org
Subject: Re: tty_register_device NULL pointer dereference in 2.6.31-rc4

On Sat, 25 Jul 2009 12:01:43 +0200
Oliver Hartkopp <oliver@...tkopp.net> wrote:

> Hello Alan and Marcel,
> 
> this morning i got a NULL pointer dereference in tty_register_device() that
> looked similar to the one, i posted here on 03-jun-2009:
> 
> http://marc.info/?l=linux-bluetooth&m=124404919324542&w=2
> 
> As the boot sequence stopped after this point, i was only able to take a
> picture of it - see attached jpg.
> 
> I was able to shut down the system gracefully by pressing the power button.
> 
> The problem emerges really seldom.
> 
> Any idea?

tty_register_device appears to have been called with a NULL pointer. Not
sure why however.
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