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<base href="https://bugs.documentfoundation.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_UNCONFIRMED "
title="UNCONFIRMED - Missing NSS libs in the chroot cause loolforkit to segfault on PDF export"
href="https://bugs.documentfoundation.org/show_bug.cgi?id=121429">121429</a>
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<th>Summary</th>
<td>Missing NSS libs in the chroot cause loolforkit to segfault on PDF export
</td>
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<th>Product</th>
<td>LibreOffice Online
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Status</th>
<td>UNCONFIRMED
</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>LibreOffice
</td>
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<th>Assignee</th>
<td>libreoffice-bugs@lists.freedesktop.org
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<th>Reporter</th>
<td>guilhem@fripost.org
</td>
</tr></table>
<p>
<div>
<pre>On Debian systems, extra libraries have to be copied to the systemplate chroot,
namely /usr/lib/$TRIPLET/nss/*.so and /usr/lib/$TRIPLET/libsqlite3.so.* (where
$TRIPLET is the architecture triplet, typically "x86_64-linux-gnu").
These libraries don't show up in `ldd /path/to/xpdfimport`, but omitting them
in the chroot (partially) breaks NSS. In particular, exporting a document to
PDF, either directly in LOOL or using its API with `curl -F
data=@/path/to/doc.odt <a href="http://127.0.0.1:9980/lool/convert-to/pdf">http://127.0.0.1:9980/lool/convert-to/pdf</a>`, causes
loolforkit to segfault. AFAICT from a debug trace, this is because the PDF
writer calls ::comphelper::Hash which in turns triggers a null pointer
dereference in libnss's HASH_Begin.
Making loolwsd-systemplate-setup copy these libraries to the chroot fixed the
PDF export issue on our instance. The problem might be Debian-specific as
RedHat-based distros don't have that "nss" sub-directory (instead libfreebl3.so
and friends are copied directly in /lib; not sure if on these systems the
chroot has a crippled libnss or not).
System info: LOOLWSD 6.1.3, LOKit 6.1.3.2</pre>
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