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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - REGRESSION: clang-3.8+ do not work well with _FORTIFY_SOURCE and struct socket with addresses > 14 bytes"
href="https://llvm.org/bugs/show_bug.cgi?id=30346">30346</a>
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<th>Summary</th>
<td>REGRESSION: clang-3.8+ do not work well with _FORTIFY_SOURCE and struct socket with addresses > 14 bytes
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>3.8
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>jeremyhu@apple.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=17237" name="attach_17237" title="reproduction test case">attachment 17237</a> <a href="attachment.cgi?id=17237&action=edit" title="reproduction test case">[details]</a></span>
reproduction test case
If _FORTIFY_SOURCE is on, strncpy() will abort incorrectly when dealing with a
`sa_data` field in `struct sockaddr` that is larger than 14 bytes. clang
incorrectly determines the size of the field to be statically 14.
This was noticed in X11 with the logic in libxtrans. I've prepared a
simplified test case.</pre>
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