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This is an automatically generated e-mail. To reply, visit:
<a href="https://reviewboard.asterisk.org/r/3209/">https://reviewboard.asterisk.org/r/3209/</a>
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<p style="margin-top: 0;">On March 13th, 2014, 3:40 p.m. CDT, <b>Corey Farrell</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/3209/diff/2/?file=55881#file55881line1119" style="color: black; font-weight: bold; text-decoration: underline;">/branches/11/main/format.c</a>
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(Diff revision 2)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static void format_attr_shutdown(void)</pre></td>
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<th bgcolor="#f0f0f0" style="border-right: 1px solid #C0C0C0;" align="right"><font size="2">1116</font></th>
<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="k">if</span> <span class="p">(</span><span class="n">interfaces</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="tb"> </span><span class="k">if</span> <span class="p">(</span><span class="n">interfaces</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<pre style="white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I think this condition still needs !ast_undestroyed_channels(). If we have undestroyed channels then find_interface will be called many times per second. format_attr_shutdown could free interfaces after find_interface has already checked it, allowing ao2_find on either an already freed or NULL pointer.</pre>
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<pre style="margin-left: 1em; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">I think to resolve that properly would require a lock interaction between find_interfaces and shutdown, which would be a significant performance impact that should be avoided. I'm not in favor of just leaking the memory due to shutdown order either. I'll try Mark's suggestion of a ao2 global object instead.</pre>
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<p>- Scott</p>
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<p>On March 13th, 2014, 12:37 p.m. CDT, Scott Griepentrog wrote:</p>
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<div>Review request for Asterisk Developers, Corey Farrell and n8ideas.</div>
<div>By Scott Griepentrog.</div>
<p style="color: grey;"><i>Updated March 13, 2014, 12:37 p.m.</i></p>
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<b style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Bugs: </b>
<a href="https://issues.asterisk.org/jira/browse/ASTERISK-23103">ASTERISK-23103</a>
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<b style="color: #575012; font-size: 10pt;">Repository: </b>
Asterisk
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Description </h1>
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<pre style="margin: 0; padding: 0; white-space: pre-wrap; white-space: -moz-pre-wrap; white-space: -pre-wrap; white-space: -o-pre-wrap; word-wrap: break-word;">Alternate method to more safely shutdown interfaces container. Set interface global to null first to avoid possible race condition, and also double check interfaces prior to all uses.
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/branches/11/main/format.c <span style="color: grey">(410525)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/3209/diff/" style="margin-left: 3em;">View Diff</a></p>
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