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<th>Priority</th>
<td>medium
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<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - memblockq: Assertion 'length % bq->base == 0' failed, pulseaudio aborts"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77595">77595</a>
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<th>CC</th>
<td>lennart@poettering.net
</td>
</tr>
<tr>
<th>Assignee</th>
<td>pulseaudio-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>memblockq: Assertion 'length % bq->base == 0' failed, pulseaudio aborts
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>pulseaudio-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
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<th>Reporter</th>
<td>fsateler@gmail.com
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</tr>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Component</th>
<td>daemon
</td>
</tr>
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<th>Product</th>
<td>PulseAudio
</td>
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<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=97540" name="attach_97540" title="A test program causing the daemon to abort">attachment 97540</a> <a href="attachment.cgi?id=97540&action=edit" title="A test program causing the daemon to abort">[details]</a></span>
A test program causing the daemon to abort
Forwarded from the debian bug tracker:
<span class="quote">> I found that pa_stream_write with an offset that's not a multiple of
> the base sample size causes pulseaudio to assert and abort. This is
> not the case for the nbytes parameter of how many bytes to write, that
> is allowed to not be a multiple of the sample size, but the seek
> offset parameter must be a multiple of the sample size or it asserts.</span >
And he provided a test program
<span class="quote">> I modified a test (attached) to
> demonstrate it is still a problem. There might be a shorter setup
> sequence, but it comes down to giving SEEK as something other than a
> multiple of the sample size.
> pa_stream_write(p, buffer, nbytes, NULL, SEEK, PA_SEEK_RELATIVE);</span >
David tested against pa 2.0, but I can reproduce the problem with 5.0 as well.
Please find attached the test program that causes the daemon to abort.</pre>
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