linux-kernel - Re: WARNING: at drivers/tty/tty

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Message-ID: <20130211024412.GA7623@concordia>
Date:	Mon, 11 Feb 2013 13:44:12 +1100
From:	Michael Ellerman <michael@...erman.id.au>
To:	Peter Hurley <peter@...leysoftware.com>
Cc:	Jiri Slaby <jslaby@...e.cz>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Dave Jones <davej@...hat.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: WARNING: at drivers/tty/tty_buffer.c:476  (tty is NULL)

On Wed, Jan 30, 2013 at 01:33:57PM -0500, Peter Hurley wrote:
> On Sat, 2013-01-19 at 22:00 +0100, Jiri Slaby wrote:
> > On 01/18/2013 10:07 PM, Greg Kroah-Hartman wrote:
> > > Jiri, was there anything on the mailing list that I missed that should
> > > have resolved this issue?  I thought it was being worked on, but I can't
> > > seem to find any resolution at the moment.
> > 
> > Somebody had a patchset and promised to repost IIRC. I forgot his name
> > though.
> > 
> > /me back from digging in the mail history.
> > 
> > Peter Hurley is the name.
> > 
> > Peter, what happened with your patches in the end, please?
> 
> The tty subsystem is very resilient to fixing :)
> 
> The thing I'm working on right now -- which hopefully is the last issue
> with the line discipline logic -- occurs with parallel __tty_hangup()
> and tty_release().
> 
> At the moment, I'm trying to narrow the conditions when this happens.

If it helps I seem to be able to reproduce this in just a few seconds by
running trinity and hitting Ctrl-C to quit the watchdog.

cheers
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