<ul>
<li>avoid crash by fixing "first" and "last" pointers of of the ts_entry_t after ts_urecord_t deletion</li>
</ul>


<h4>Pre-Submission Checklist</h4>



<ul class="contains-task-list">
<li class="task-list-item"><input checked="" class="task-list-item-checkbox" disabled="" id="" type="checkbox"> Commit message has the format required by CONTRIBUTING guide</li>
<li class="task-list-item"><input checked="" class="task-list-item-checkbox" disabled="" id="" type="checkbox"> Commits are split per component (core, individual modules, libs, utils, ...)</li>
<li class="task-list-item"><input checked="" class="task-list-item-checkbox" disabled="" id="" type="checkbox"> Each component has a single commit (if not, squash them into one commit)</li>
<li class="task-list-item"><input checked="" class="task-list-item-checkbox" disabled="" id="" type="checkbox"> No commits to README files for modules (changes must be done to docbook files<br>
in <code>doc/</code> subfolder, the README file is autogenerated)</li>
</ul>
<h4>Type Of Change</h4>
<ul class="contains-task-list">
<li class="task-list-item"><input checked="" class="task-list-item-checkbox" disabled="" id="" type="checkbox"> Small bug fix (non-breaking change which fixes an issue)</li>
<li class="task-list-item"><input class="task-list-item-checkbox" disabled="" id="" type="checkbox"> New feature (non-breaking change which adds new functionality)</li>
<li class="task-list-item"><input class="task-list-item-checkbox" disabled="" id="" type="checkbox"> Breaking change (fix or feature that would change existing functionality)</li>
</ul>
<h4>Checklist:</h4>

<ul class="contains-task-list">
<li class="task-list-item"><input checked="" class="task-list-item-checkbox" disabled="" id="" type="checkbox"> PR should be backported to stable branches</li>
<li class="task-list-item"><input checked="" class="task-list-item-checkbox" disabled="" id="" type="checkbox"> Tested changes locally</li>
<li class="task-list-item"><input class="task-list-item-checkbox" disabled="" id="" type="checkbox"> Related to issue #XXXX (replace XXXX with an open issue number)</li>
</ul>
<h4>Description</h4>

<p>tsilo module didn't reset "<strong>first</strong>" and "<strong>last</strong>" pointers of a doubly linked list of <strong>ts_urecord_t</strong> objects. It worked correctly only when there were no hash collisions and each ts_entry slot had only one <strong>ts_urecord_t</strong> object. To faster reproduce the problem one can set <strong>modparam("tsilo", "hash_size", 2)</strong> and run a light load test (5...10 simultaneous call setups).</p>

<hr>

<h4>You can view, comment on, or merge this pull request online at:</h4>
<p>  <a href='https://github.com/kamailio/kamailio/pull/1302'>https://github.com/kamailio/kamailio/pull/1302</a></p>

<h4>Commit Summary</h4>
<ul>
  <li>tsilo: fix internal data structures</li>
</ul>

<h4>File Changes</h4>
<ul>
  <li>
    <strong>M</strong>
    <a href="https://github.com/kamailio/kamailio/pull/1302/files#diff-0">src/modules/tsilo/ts_hash.c</a>
    (8)
  </li>
</ul>

<h4>Patch Links:</h4>
<ul>
  <li><a href='https://github.com/kamailio/kamailio/pull/1302.patch'>https://github.com/kamailio/kamailio/pull/1302.patch</a></li>
  <li><a href='https://github.com/kamailio/kamailio/pull/1302.diff'>https://github.com/kamailio/kamailio/pull/1302.diff</a></li>
</ul>

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