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<body><span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW - [Regression BDW] kernel panic in Intel i915 module, complete system freeze in 4.10-rc2"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99295">bug 99295</a>
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<td>NEEDINFO
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<td>NEW
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [Regression BDW] kernel panic in Intel i915 module, complete system freeze in 4.10-rc2"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99295#c8">Comment # 8</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [Regression BDW] kernel panic in Intel i915 module, complete system freeze in 4.10-rc2"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99295">bug 99295</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>(In reply to Chris Wilson from <a href="show_bug.cgi?id=99295#c7">comment #7</a>)
<span class="quote">> From <a class="bz_bug_link
bz_status_NEW "
title="NEW - XVMC on nv43 class card broken with recent mesa + kernel."
href="show_bug.cgi?id=99584">bug 99584</a>:
>
> It looks like we are hitting a use-after-free in
> gen8_ppgtt_alloc_page_directories with some pdp state. One possible theory
> from looking at the log is that the shrinker kicks in and starts swinging
> its axe, evicting one or more vma's, which results in said pdp being freed,</span >
Confirmed with a kselftest that is exactly what is happening here. Or at least
we have a bug exactly like that. The patches to adjust used_pte accounting
fixes my kselftest.</pre>
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