linux-kernel - Re: tty, vt: lockdep warnings

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Message-ID: <CA+1xoqdEesjh1EZvR_r7Hn0GUc7741EDWn59qagngcxg4=9bjQ@mail.gmail.com>
Date:	Mon, 5 Nov 2012 12:26:43 -0500
From:	Sasha Levin <levinsasha928@...il.com>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Sasha Levin <sasha.levin@...cle.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jslaby@...e.cz>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Dave Jones <davej@...hat.com>, linux-fbdev@...r.kernel.org,
	florianSchandinat@....de
Subject: Re: tty, vt: lockdep warnings

Ping? Should I bisect it?

On Fri, Oct 26, 2012 at 9:37 AM, Alan Cox <alan@...rguk.ukuu.org.uk> wrote:
> On Thu, 25 Oct 2012 15:37:43 -0400
> Sasha Levin <sasha.levin@...cle.com> wrote:
>
>> Hi all,
>>
>> While fuzzing with trinity inside a KVM tools (lkvm) guest running latest -next kernel,
>> I've stumbled on the following spew:
>
> Looks real enough but its not a tty/vt layer spew. This is all coming out
> of the core framebuffer code which doesn't seem to be able to decide what
> the locking rules at the invocation of fb_notifier_call_chain are.
>
> It might need some console layer tweaking to provide 'register console
> and I already hold the locks' or similar but that notifier needs some
> kind of sanity applying as well.
>
> Cc'ing the fbdev folks
>
> Alan
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