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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>
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<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - UBSAN in ../drivers/gpu/drm/drm_modes.c:325:49"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98372">bug 98372</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - UBSAN in ../drivers/gpu/drm/drm_modes.c:325:49"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98372#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - UBSAN in ../drivers/gpu/drm/drm_modes.c:325:49"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98372">bug 98372</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>commit 8a5bbf327aa16025c78491266a6425807c7fbee0
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Fri Oct 21 15:15:40 2016 +0100
drm: Use u64 for intermediate dotclock calculations
We have reached the era where monitor bandwidths now exceed 31bits in
frequency calculations, though as we stored them in kHz units we are
safe from overflow in the modelines for some time.
[ 48.723720] UBSAN: Undefined behaviour in
../drivers/gpu/drm/drm_modes.c:325:49
[ 48.726943] signed integer overflow:
[ 48.728503] 2240 * 1000000 cannot be represented in type 'int'
Reported-by: Martin Liška <<a href="mailto:marxin.liska@gmail.com">marxin.liska@gmail.com</a>>
Bugzilla: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - UBSAN in ../drivers/gpu/drm/drm_modes.c:325:49"
href="show_bug.cgi?id=98372">https://bugs.freedesktop.org/show_bug.cgi?id=98372</a>
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Reviewed-by: Alex Deucher <<a href="mailto:alexander.deucher@amd.com">alexander.deucher@amd.com</a>>
Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Link:
<a href="http://patchwork.freedesktop.org/patch/msgid/20161021141540.26837-1-chris@chris-wilson.co.uk">http://patchwork.freedesktop.org/patch/msgid/20161021141540.26837-1-chris@chris-wilson.co.uk</a></pre>
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