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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - amdgpu_vm_bo_invalidate NULL reference in amd-staging-drm-next"
href="https://bugs.freedesktop.org/show_bug.cgi?id=102666">102666</a>
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<th>Summary</th>
<td>amdgpu_vm_bo_invalidate NULL reference in amd-staging-drm-next
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>DRI git
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/AMDgpu
</td>
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<th>Assignee</th>
<td>dri-devel@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>bas@basnieuwenhuizen.nl
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=134171" name="attach_134171" title="dmesg">attachment 134171</a> <a href="attachment.cgi?id=134171&action=edit" title="dmesg">[details]</a></span>
dmesg
I'm getting a
[ 404.518419] BUG: unable to handle kernel NULL pointer dereference at
0000000000000220
[ 404.518445] IP: amdgpu_vm_bo_invalidate+0x71/0x150 [amdgpu]
when running vulkan cts with 32 processes (with tests that cause OOM removed).
Current linux tip:
commit 2dd9dc59c1419c090b084461165bd8b0adf1fecb (HEAD -> amd-staging-drm-next,
origin/amd-staging-drm-next)
Author: Harry Wentland <<a href="mailto:harry.wentland@amd.com">harry.wentland@amd.com</a>>
Date: Thu Aug 31 21:17:05 2017 -0400
drm/amdgpu: Remove unused flip_flags from amdgpu_crtc
It doesn't seem like there is a correlating hang: the card is clocked down and
/sys/kernel/debug/dri/0/amdgpu_fence_info shows no pending fences. However,
eventually some of the CTS processes get stuck, and I can't kill them gdb into
them etc. Probably a pagefault that gets stuck, since fence waiting doesn't
seem to get stuck easily? Either way, not sure if that is related yet.
AFAICT the issue is that vm->root.base.bo is NULL in
if (evicted && bo->tbo.resv == vm->root.base.bo->tbo.resv) {</pre>
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