linux-kernel - Re: WARN_ON() and X session lost from i915 on 3.14-rc6

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Message-ID: <20140313084002.GB8902@amd.pavel.ucw.cz>
Date:	Thu, 13 Mar 2014 09:40:02 +0100
From:	Pavel Machek <pavel@....cz>
To:	Chris Wilson <chris@...is-wilson.co.uk>, daniel.vetter@...ll.ch,
	jani.nikula@...ux.intel.com, intel-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	kernel list <linux-kernel@...r.kernel.org>
Subject: Re: WARN_ON() and X session lost from i915 on 3.14-rc6

On Wed 2014-03-12 23:52:09, Chris Wilson wrote:
> On Thu, Mar 13, 2014 at 12:30:39AM +0100, Pavel Machek wrote:
> > Hi!
> > 
> > This cost me two half-written mails...
> > 
> > So far it happened once, so it may be very infrequent; but I do not
> > think I seen similar failure from i915 before, so it may be an
> > regression. Well...
> 
> It's a userspace use-after-free bug. Please file a bug on
> bugs.freedesktop.org.

Could we get some better messages from the kernel? Userspace should
not be able to produce WARN_ON()s.

(This is debian 6.0.8; do you think it is worth reporting? I don't
think I should go to bugs.freedesktop.org...)

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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