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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [i915] oops in intel_update_cursor_plane(): "BUG: unable to handle kernel NULL pointer dereference""
href="https://bugs.freedesktop.org/show_bug.cgi?id=100725#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [i915] oops in intel_update_cursor_plane(): "BUG: unable to handle kernel NULL pointer dereference""
href="https://bugs.freedesktop.org/show_bug.cgi?id=100725">bug 100725</a>
from <span class="vcard"><a class="email" href="mailto:krisman@collabora.co.uk" title="krisman@collabora.co.uk">krisman@collabora.co.uk</a>
</span></b>
<pre>(In reply to David H. Gutteridge from <a href="show_bug.cgi?id=100725#c0">comment #0</a>)
<span class="quote">> Created <span class=""><a href="attachment.cgi?id=130919" name="attach_130919" title="Log of dmesg with drm.debug enabled from boot to oops">attachment 130919</a> <a href="attachment.cgi?id=130919&action=edit" title="Log of dmesg with drm.debug enabled from boot to oops">[details]</a></span>
> Log of dmesg with drm.debug enabled from boot to oops
>
> I've been encountering a recurring kernel oops since I upgraded a (rather
> old) laptop to the 4.10 kernel series. These happen pretty consistently
> after the machine has been up for a few hours, and after a series of
> warnings are logged.
> I reproduced this with Fedora's 4.10.11-200.fc25.i686 kernel last evening.
> This is a regression against the 4.9 kernel.</span >
<span class="quote">> I've attached a dmesg log from boot to the oops, with drm.debug output
> enabled.</span >
Sorry for the delay. Is this still reproducible with a recent kernel?
The log has some high order allocation failure in GEM immediately preceding the
WARN_ON and oops, so this is likely a mishandling of the allocation error path.
Since you observed this on a 4.10 distro kernel, can you please confirm it
still occur with the tip of drm-intel-nightly mainline branch and provide the
logs?
Thanks.</pre>
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