[Bug 87568] WebGL can cause GPU reset

[Bug 87568] WebGL can cause GPU reset

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https://bugs.freedesktop.org/show_bug.cgi?id=87568

            Bug ID: 87568
           Summary: WebGL can cause GPU reset
           Product: Mesa
           Version: 10.3
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: aaalmosss@gmail.com

I was given this link: http://hunger.hu/webgl.html which was supposed to crash
any video driver, and it really did a hiccup. Fortunately, after 1 second the
kernel detected GPU lockup, and reinitialized everything just fine.

As far as I can tell that javascript doesn't do anything sinister, just tries
to render 200k triangles with a single glDrawElements() call. Shouldn't there
be a protection against such simple overflows somewhere?

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[Bug 87568] WebGL can cause GPU reset

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https://bugs.freedesktop.org/show_bug.cgi?id=87568

--- Comment #1 from Ian Romanick <idr@freedesktop.org> ---
It can be impossible to tell the difference between a draw that will take a
very long time and a draw that will never complete, so possibly not.  See also
http://en.wikipedia.org/wiki/Halting_problem.

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[Bug 87568] WebGL can cause GPU reset

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https://bugs.freedesktop.org/show_bug.cgi?id=87568

--- Comment #2 from Marek Olšák <maraeo@gmail.com> ---
Did you set your lockup timeout to 1s? I recommend reverting to the default
timeout (10s).

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[Bug 87568] WebGL can cause GPU reset

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https://bugs.freedesktop.org/show_bug.cgi?id=87568

--- Comment #3 from almos <aaalmosss@gmail.com> ---
(In reply to Ian Romanick from comment #1)
> It can be impossible to tell the difference between a draw that will take a
> very long time and a draw that will never complete, so possibly not.  See
> also http://en.wikipedia.org/wiki/Halting_problem.

That's why WebGL was a bad idea in the first place.

As far as I can remember the timeout was 1 second, but since then I upgraded my
system, kernel included, and when I tried now the timeout was 10s.

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[Bug 87568] WebGL can cause GPU reset

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https://bugs.freedesktop.org/show_bug.cgi?id=87568

GitLab Migration User <gitlab-migration@fdo.invalid> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |MOVED

--- Comment #4 from GitLab Migration User <gitlab-migration@fdo.invalid> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/537.

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