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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][BAT] igt@i915_selftest@live_mman - dmesg-warn - BUG drm_i915_gem_object: Poison overwritten"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111037#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [CI][BAT] igt@i915_selftest@live_mman - dmesg-warn - BUG drm_i915_gem_object: Poison overwritten"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111037">bug 111037</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>If I am not mistaken, that is a stray 64b write of 1, 144 bytes into a
i915_gem_object
On my kernel that would put it around:
offsetof(drm_gem_object.vma_node)=24
offsetofend(drm_gem_object.vma_node)=208
...
offsetof(drm_gem_object.vma_node.vm_node.rb_hole_addr)=144
That doesn't seem particularly valid for a rbtree_node.parent, so either it's a
completely stray write, my counting is wrong and its not 144 bytes in, or
there's a massive layout difference between my kernel and CI.</pre>
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