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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - mpv segfaults in brw_bo_unreference () at /usr/lib/xorg/modules/dri/i965_dri.so when spamming fullscreen key"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104301">104301</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>mpv segfaults in brw_bo_unreference () at /usr/lib/xorg/modules/dri/i965_dri.so when spamming fullscreen key
</td>
</tr>
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<th>Product</th>
<td>Mesa
</td>
</tr>
<tr>
<th>Version</th>
<td>17.3
</td>
</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>Drivers/DRI/i965
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>fdbugs@fratti.ch
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - mpv segfaults in brw_bo_unreference () at /usr/lib/xorg/modules/dri/i965_dri.so when spamming fullscreen key"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104301#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - mpv segfaults in brw_bo_unreference () at /usr/lib/xorg/modules/dri/i965_dri.so when spamming fullscreen key"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104301">bug 104301</a>
from <span class="vcard"><a class="email" href="mailto:fdbugs@fratti.ch" title="fdbugs@fratti.ch">fdbugs@fratti.ch</a>
</span></b>
<pre>I've done some further testing and this seems to only crash reliably when
playing back 60 fps content; this seems to imply a race condition of some sort
that's more likely to lead to a crash in mesa the higher mpv's framerate is.</pre>
</div>
<div>
<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - mpv segfaults in brw_bo_unreference () at /usr/lib/xorg/modules/dri/i965_dri.so when spamming fullscreen key"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104301#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - mpv segfaults in brw_bo_unreference () at /usr/lib/xorg/modules/dri/i965_dri.so when spamming fullscreen key"
href="https://bugs.freedesktop.org/show_bug.cgi?id=104301">bug 104301</a>
from <span class="vcard"><a class="email" href="mailto:fdbugs@fratti.ch" title="fdbugs@fratti.ch">fdbugs@fratti.ch</a>
</span></b>
<pre>Correction: I'm not sure if it's a Skylake. It's whatever the Intel(R) Core(TM)
i7-7500U is. (So 7th Gen, I guess)</pre>
</div>
<div>
<pre>When I watch a video with mpv (git HEAD) on mesa 17.3.0, and spam the
fullscreen key, I get a segfault with the following backtrace:
(gdb) bt
#0 0x00007fff9bce2f73 in brw_bo_unreference () at
/usr/lib/xorg/modules/dri/i965_dri.so
#1 0x00007fff9bd1401d in intel_destroy_image () at
/usr/lib/xorg/modules/dri/i965_dri.so
#2 0x00007fff9aea5365 in dri3_free_render_buffer.isra () at
/usr/lib/libEGL_mesa.so.0
#3 0x00007fff9aea62e9 in dri3_get_buffer.isra () at /usr/lib/libEGL_mesa.so.0
#4 0x00007fff9aea6e90 in loader_dri3_get_buffers () at
/usr/lib/libEGL_mesa.so.0
#5 0x00007fff9bce8fd6 in intel_update_renderbuffers ()
at /usr/lib/xorg/modules/dri/i965_dri.so
#6 0x00007fff9bce9301 in intel_prepare_render () at
/usr/lib/xorg/modules/dri/i965_dri.so
#7 0x00007fff9bce4c9c in brw_clear () at /usr/lib/xorg/modules/dri/i965_dri.so
#8 0x000055555579e9cd in gl_clear (ra=<optimized out>, dst=<optimized out>,
color=0x7fffbdffa3c0, scissor=0x7fffbdffa380) at
../video/out/opengl/ra_gl.c:636
#9 0x000055555579928d in gl_video_render_frame (p=0x7fffac64ff60,
frame=frame@entry=0x5555575e0460, fbo=...) at ../video/out/gpu/video.c:3016
#10 0x00005555557ac5e5 in draw_frame (vo=0x555557462190, frame=0x5555575e0460)
at ../video/out/vo_gpu.c:87
#11 0x00005555557a90d2 in vo_render_frame_external (vo=vo@entry=0x555557462190)
at ../video/out/vo.c:870
#12 0x00005555557a9978 in vo_thread (ptr=0x555557462190) at
../video/out/vo.c:1016
#13 0x00007fffefeba08a in start_thread () at /usr/lib/libpthread.so.0
#14 0x00007ffff06e142f in clone () at /usr/lib/libc.so.6
mpv configuration doesn't appear to matter, since it also happens with
--no-config.
Using a Skylake.</pre>
</div>
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