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      <base href="https://llvm.org/bugs/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <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>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>REGRESSION: clang-3.8+ do not work well with _FORTIFY_SOURCE and struct socket with addresses > 14 bytes
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>3.8
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>-New Bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>jeremyhu@apple.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvm-bugs@lists.llvm.org
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <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>
        </div>
      </p>
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