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