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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 - Crash when absinfo_x/y is nil"
href="https://bugs.freedesktop.org/show_bug.cgi?id=86993">86993</a>
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<th>Summary</th>
<td>Crash when absinfo_x/y is nil
</td>
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<th>Product</th>
<td>Wayland
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>critical
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>libinput
</td>
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<th>Assignee</th>
<td>wayland-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>starxforever@live.com
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=110439" name="attach_110439" title="temporary patch to solve this issue">attachment 110439</a> <a href="attachment.cgi?id=110439&action=edit" title="temporary patch to solve this issue">[details]</a></span>
temporary patch to solve this issue
libinput, SRCREV = 56b5f846ac7f8243da4ba2f288654becf1014c46
issue:
Weston will crash when plugin a mouse device.
precondition:
Define "LIBINPUT_CALIBRATION_MATRIX" in udev rules;
crash point:
crash happens in function "evdev_device_calibrate()" when calculate x/y
scaler:
sx = device->abs.absinfo_x->maximum - device->abs.absinfo_x->minimum + 1;
sy = device->abs.absinfo_y->maximum - device->abs.absinfo_y->minimum + 1;
inside this calculation, maybe the absinfo_x/y is nil, then the access to
maximum & minimum value will aborted.
even it is caused by the driver, i thin libinput need to focus this case.
see the attached patch for a temporary solution.</pre>
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