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<p style="margin-top: 0;">On April 11th, 2012, 3:34 p.m., <b>rmudgett</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1863/diff/1/?file=27151#file27151line3864" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/apps/app_voicemail.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int store_file(const char *dir, const char *mailboxuser, const char *mailboxcontext, int msgnum)</pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">ast_debug</span><span class="p">(</span><span class="mi">5</span><span class="p">,</span> <span class="s">"Length is %zd</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">fdlen</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;">fdlen is no longer a size_t so you just need to use %d or change fdlen to ssize_t.</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;">Or just get rid of the debug statement, which added very little value.</pre>
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<p style="margin-top: 0;">On April 11th, 2012, 3:34 p.m., <b>rmudgett</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1863/diff/1/?file=27153#file27153line8731" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/channels/chan_dahdi.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static struct ast_frame *__dahdi_exception(struct ast_channel *ast)</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">idx</span> <span class="o">=</span> <span class="n">dahdi_get_index</span><span class="p">(</span><span class="n">ast</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="mi"><span class="hl">1</span></span><span class="p"><span class="hl">);</span></span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="hl"> </span><span class="k"><span class="hl">if</span></span><span class="hl"> </span><span class="p"><span class="hl">((</span></span><span class="n">idx</span> <span class="o">=</span> <span class="n">dahdi_get_index</span><span class="p">(</span><span class="n">ast</span><span class="p">,</span> <span class="n">p</span><span class="p">,</span> <span class="mi"><span class="hl">0</span></span><span class="p"><span class="hl">))</span></span><span class="hl"> </span><span class="o"><span class="hl"><</span></span><span class="hl"> </span><span class="mi"><span class="hl">0</span></span><span class="p"><span class="hl">)</span></span><span class="hl"> </span><span class="p"><span class="hl">{</span></span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">f</span> <span class="o">=</span> <span class="o">&</span><span class="n">ast_null_frame</span><span class="p">;</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">return</span> <span class="n">f</span><span class="p">;</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <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;">This should do the same thing as analog_exception() in sig_analog.c.</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 saw that in sig_analog but wasn't sure if the same could safely be done here as well. Done.</pre>
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<p style="margin-top: 0;">On April 11th, 2012, 3:34 p.m., <b>rmudgett</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1863/diff/1/?file=27157#file27157line130" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/formats/format_gsm.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int gsm_write(struct ast_filestream *fs, struct ast_frame *f)</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span><span class="p">(</span><span class="n">whence</span> <span class="o">==</span> <span class="n">SEEK_SET</span><span class="p">)</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span><span class="p">(</span><span class="n">whence</span> <span class="o">==</span> <span class="n">SEEK_SET</span><span class="p">)</span><span class="hl"> </span><span class="p"><span class="hl">{</span></span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">offset</span> <span class="o">=</span> <span class="n">distance</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="n">offset</span> <span class="o">=</span> <span class="n">distance</span><span class="p">;</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">else</span> <span class="k">if</span><span class="p">(</span><span class="n">whence</span> <span class="o">==</span> <span class="n">SEEK_CUR</span> <span class="o">||</span> <span class="n">whence</span> <span class="o">==</span> <span class="n">SEEK_FORCECUR</span><span class="p">)</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="hl"> </span><span class="p"><span class="hl">}</span></span><span class="hl"> </span><span class="k">else</span> <span class="k">if</span><span class="p">(</span><span class="n">whence</span> <span class="o">==</span> <span class="n">SEEK_CUR</span> <span class="o">||</span> <span class="n">whence</span> <span class="o">==</span> <span class="n">SEEK_FORCECUR</span><span class="p">)</span><span class="hl"> </span><span class="p"><span class="hl">{</span></span></pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">offset</span> <span class="o">=</span> <span class="n">distance</span> <span class="o">+</span> <span class="n">cur</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="n">offset</span> <span class="o">=</span> <span class="n">distance</span> <span class="o">+</span> <span class="n">cur</span><span class="p">;</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">else</span> <span class="k">if</span><span class="p">(</span><span class="n">whence</span> <span class="o">==</span> <span class="n">SEEK_END</span><span class="p">)</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "><span class="hl"> </span><span class="p"><span class="hl">}</span></span><span class="hl"> </span><span class="k">else</span> <span class="k">if</span><span class="p">(</span><span class="n">whence</span> <span class="o">==</span> <span class="n">SEEK_END</span><span class="p">)</span><span class="hl"> </span><span class="p"><span class="hl">{</span></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;">Since you're formatting here, add a space between if(</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;">Done</pre>
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<p style="margin-top: 0;">On April 11th, 2012, 3:34 p.m., <b>rmudgett</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1863/diff/1/?file=27172#file27172line3634" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/main/manager.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int action_command(struct mansession *s, const struct message *m)</pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">lseek</span><span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">SEEK_SET</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="n">lseek</span><span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="mi">0</span><span class="p">,</span> <span class="n">SEEK_SET</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;">What about this lseek?</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;">Technically, not covered by this review because we don't use the value that it returns. Presumably, if that lseek failed then we would fail to set the position to the beginning fo the file. If that's the case, then the last successful lseek would have placed us at the end of the file. The subsequent read operation would read 0 bytes (EOF) and would presumably place nothing in the buffer. Eventually we'd end up trying to append a buffer filled with NULL characters to the manager response - which wouldn't cause a crash, but would probably be incorrect from the perspective of the receiver.
I'll just check for the return value of lseek as well.</pre>
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<p style="margin-top: 0;">On April 11th, 2012, 3:34 p.m., <b>rmudgett</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1863/diff/1/?file=27172#file27172line3635" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/main/manager.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static int action_command(struct mansession *s, const struct message *m)</pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="n">read</span><span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="n">buf</span><span class="p">,</span> <span class="n">l</span><span class="p">)</span> <span class="o"><</span> <span class="mi">0</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="k">if</span> <span class="p">(</span><span class="n">read</span><span class="p">(</span><span class="n">fd</span><span class="p">,</span> <span class="n">buf</span><span class="p">,</span> <span class="n">l</span><span class="p">)</span> <span class="o"><</span> <span class="mi">0</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="n">ast_log</span><span class="p">(</span><span class="n">LOG_WARNING</span><span class="p">,</span> <span class="s">"read() failed: %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">strerror</span><span class="p">(</span><span class="n">errno</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="n">ast_log</span><span class="p">(</span><span class="n">LOG_WARNING</span><span class="p">,</span> <span class="s">"read() failed: %s</span><span class="se">\n</span><span class="s">"</span><span class="p">,</span> <span class="n">strerror</span><span class="p">(</span><span class="n">errno</span><span class="p">));</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">astman_send_error</span><span class="p">(</span><span class="n">s</span><span class="p">,</span> <span class="n">m</span><span class="p">,</span> <span class="s">"Command response construction error"</span><span class="p">);</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">goto</span> <span class="n">action_command_cleanup</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="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="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;">buf is leaked here.</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;">Done</pre>
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<p style="margin-top: 0;">On April 11th, 2012, 3:34 p.m., <b>rmudgett</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1863/diff/1/?file=27174#file27174line1300" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/res/res_agi.c</a>
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(Diff revision 1)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static enum agi_result launch_asyncagi(struct ast_channel *chan, char *argv[], int *efd)</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">res</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">res</span><span class="hl"> </span><span class="o"><span class="hl">||</span></span><span class="hl"> </span><span class="n"><span class="hl">res</span></span><span class="hl"> </span><span class="o"><span class="hl"><</span></span><span class="hl"> </span><span class="mi"><span class="hl">0</span></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;">Why not just if (res <= 0)</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;">Changed</pre>
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<p style="margin-top: 0;">On April 11th, 2012, 3:34 p.m., <b>rmudgett</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1863/diff/1/?file=27174#file27174line1330" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/res/res_agi.c</a>
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(Diff revision 1)
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static enum agi_result launch_asyncagi(struct ast_channel *chan, char *argv[], int *efd)</pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">res</span><span class="p">)</span> <span class="p">{</span></pre></td>
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<td bgcolor="#fdfebc" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="n">res</span><span class="hl"> </span><span class="o"><span class="hl">||</span></span><span class="hl"> </span><span class="n"><span class="hl">res</span></span><span class="hl"> </span><span class="o"><span class="hl"><</span></span><span class="hl"> </span><span class="mi"><span class="hl">0</span></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;">Same here</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;">And here</pre>
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<p style="margin-top: 0;">On April 11th, 2012, 3:34 p.m., <b>rmudgett</b> wrote:</p>
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<a href="https://reviewboard.asterisk.org/r/1863/diff/1/?file=27175#file27175line645" style="color: black; font-weight: bold; text-decoration: underline;">/branches/1.8/res/res_musiconhold.c</a>
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<td colspan="4"><pre style="font-size: 8pt; line-height: 140%; margin: 0; ">static void *monmp3thread(void *data)</pre></td>
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<td bgcolor="#ffffff" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="n">pthread_testcancel</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="n">pthread_testcancel</span><span class="p">();</span></pre></td>
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<td bgcolor="#c5ffc4" width="50%"><pre style="font-size: 8pt; line-height: 140%; margin: 0; "> <span class="k">continue</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;">This pthread_testcancel() is now redundant.
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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;">Removed</pre>
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<p>- Matt</p>
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<p>On April 11th, 2012, 2:26 p.m., Matt Jordan wrote:</p>
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<div>Review request for Asterisk Developers.</div>
<div>By Matt Jordan.</div>
<p style="color: grey;"><i>Updated April 11, 2012, 2:26 p.m.</i></p>
<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;">Through a static analysis tool, a large number of errors were found that dealt with using potential negative return values in harmful ways. The following is a summary of the changes for the various affected files:
* app_voicemail
- a negative result from lseek is later passed into mmap as the size of the memory map
- a negative result from read closes the various file descriptors and unlinks the output file, but the next check against the return value only checks to see if its non-zero
* chan_agent - ast_channel_unlock returns a negative value if the item passed to it is NULL or an invalid ao2 object. strerror cannot accept a negative value.
* chan_dahdi - if dahdi_get_index returns a negative value, we index directly into an array
* format_* - various errors not checking return values of ftello and fseek, and passing the results into functions that expect non-negative values
* func_env - various places where the result of ftello was directly used as input to functions that expect non-negative values
* asterisk
- the request to read returns a negative value. This causes us to enter into the retry logic. If we attempt to reconnect and succeed, we would normally proceed in the for(;;) loop and attempt to index into buf using the negative return value from read. Instead, if we do reconnect, we immediately return to the beginning of the for(;;) loop and attempt a new read.
- similar situation - if a read fails, don't attempt to index into a buffer using the return value
* frame - if we can't determine a preferred codec using the provided values, don't attempt to use an index value that never got set
* manager
- various failures of mkstemp, lseek were not checked for and could be provided to methods that don't handle negative numbers
- passing a negative result from lseek into mmap as the size of the memory map
* translate - powerof can return a negative result if no bits are set, which would then be used as an index into an array
* res_agi - if read returns an error, we treated it as if bytes were read from the pipe
* res_musiconhold - if we fail to spawn spawn_mp3 returns a negative number, we wait a bit and attempt again later. However, the return 'file descriptor' srcfd is later passed into read.
* res_rtp_asterisk - ast_rtp_codecs_payload_code can return a negative value if no codecs are found that match between instance1 and the specified payload. If that's the case, the bridge should be broken, as there are no compatible formats between the two different endpoints (and we shouldn't index into an array using the return value)</pre>
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<h1 style="color: #575012; font-size: 10pt; margin-top: 1.5em;">Diffs</b> </h1>
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<li>/branches/1.8/main/translate.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/main/manager.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/main/frame.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/main/asterisk.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/funcs/func_env.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_wav_gsm.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_wav.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_vox.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_sln16.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_sln.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_siren7.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_siren14.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_pcm.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_h263.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_h264.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_ilbc.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_g729.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_gsm.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_g719.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/formats/format_g723.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/channels/chan_agent.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/channels/chan_dahdi.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/apps/app_voicemail.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/res/res_agi.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/res/res_musiconhold.c <span style="color: grey">(361945)</span></li>
<li>/branches/1.8/res/res_rtp_asterisk.c <span style="color: grey">(361945)</span></li>
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<p><a href="https://reviewboard.asterisk.org/r/1863/diff/" style="margin-left: 3em;">View Diff</a></p>
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