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<h3>
Tanu Kaskinen pushed to branch master
at <a href="https://gitlab.freedesktop.org/pulseaudio/pulseaudio">PulseAudio / pulseaudio</a>
</h3>
<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.freedesktop.org/pulseaudio/pulseaudio/commit/661b13d50d5af5c14f80e8678aaf942fbc5628ae">661b13d5</a></strong>
<div>
<span>by Frédéric Danis</span>
<i>at 2019-07-02T05:22:19Z</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">bluetooth: Fix crash in setup_stream()
setup_stream() crashes when calling set_nonblock() with an invalid
stream_fd.
On a new call, the ofono backend gets notified of a new connection.
The ofono backend sets the transport state to playing, and that triggers
a profile change, which sets up the stream for the first time.
Then module-bluetooth-policy sets up the loopbacks. The loopbacks get
fully initialized before the crash.
After module-bluetooth-policy has done its things, the execution
continues in the transport state change hook. The next hook user is
module-bluez5-device, whose handle_transport_state_change() function
gets called. It will then set up the stream again even though it's
already set up. I'm not sure if that's a some kind of a bug.
setup_stream() can handle the case where it's unnecessarily called,
though, so this second setup is not a big problem.
The crash happens, because the connection died due to POLLHUP in the IO
thread before the second setup_stream() call.
</pre>
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<h4>1 changed file:</h4>
<ul>
<li class="file-stats">
<a href="#b6a7b3a98a09917ae50ea68ef4e0e7a74bab249b">
src/modules/bluetooth/module-bluez5-device.c
</a>
</li>
</ul>
<h4>Changes:</h4>
<li id="b6a7b3a98a09917ae50ea68ef4e0e7a74bab249b">
<a href="https://gitlab.freedesktop.org/pulseaudio/pulseaudio/commit/661b13d50d5af5c14f80e8678aaf942fbc5628ae#b6a7b3a98a09917ae50ea68ef4e0e7a74bab249b"><strong>src/modules/bluetooth/module-bluez5-device.c</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -753,6 +753,8 @@ static void setup_stream(struct userdata *u) {</td>
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753
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753
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<pre style="margin: 0;"> <span id="LC753" class="line" lang="c"> <span class="k" style="font-weight: 600;">struct</span> <span class="n" style="color: #333;">pollfd</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">pollfd</span><span class="p">;</span></span>
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754
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754
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<pre style="margin: 0;"> <span id="LC754" class="line" lang="c"> <span class="kt" style="color: #458; font-weight: 600;">int</span> <span class="n" style="color: #333;">one</span><span class="p">;</span></span>
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755
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<pre style="margin: 0;"> <span id="LC755" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC756" class="line" lang="c"> <span class="n" style="color: #333;">pa_assert</span><span class="p">(</span><span class="n" style="color: #333;">u</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stream_fd</span> <span class="o" style="font-weight: 600;">>=</span> <span class="mi" style="color: #099;">0</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC757" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC758" class="line" lang="c"> <span class="cm" style="color: #998; font-style: italic;">/* return if stream is already set up */</span></span>
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757
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<pre style="margin: 0;"> <span id="LC759" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">u</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stream_setup_done</span><span class="p">)</span></span>
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758
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760
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<pre style="margin: 0;"> <span id="LC760" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span><span class="p">;</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="829" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="831" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -829,7 +831,17 @@ static int source_process_msg(pa_msgobject *o, int code, void *data, int64_t off</td>
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<pre style="margin: 0;"> <span id="LC831" class="line" lang="c"> <span class="p">}</span></span>
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832
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<pre style="margin: 0;"> <span id="LC832" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC833" class="line" lang="c"> <span class="k" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">PA_SOURCE_MESSAGE_SETUP_STREAM</span><span class="p">:</span></span>
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<pre style="margin: 0;">-<span id="LC832" class="line" lang="c"> <span class="n" style="color: #333;">setup_stream</span><span class="p">(</span><span class="n" style="color: #333;">u</span><span class="p">);</span></span>
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<pre style="margin: 0;">+<span id="LC834" class="line" lang="c"> <span class="cm" style="color: #998; font-style: italic;">/* Skip stream setup if stream_fd has been invalidated.</span></span>
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<pre style="margin: 0;">+<span id="LC835" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> This can occur if the stream has already been set up and</span></span>
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<pre style="margin: 0;">+<span id="LC836" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> then immediately received POLLHUP. If the stream has</span></span>
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<pre style="margin: 0;">+<span id="LC837" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> already been set up earlier, then this setup_stream()</span></span>
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<pre style="margin: 0;">+<span id="LC838" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> call is redundant anyway, but currently the code</span></span>
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<pre style="margin: 0;">+<span id="LC839" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> is such that this kind of unnecessary setup_stream()</span></span>
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<pre style="margin: 0;">+<span id="LC840" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> calls can happen. */</span></span>
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<pre style="margin: 0;">+<span id="LC841" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">u</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stream_fd</span> <span class="o" style="font-weight: 600;"><</span> <span class="mi" style="color: #099;">0</span><span class="p">)</span></span>
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842
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<pre style="margin: 0;">+<span id="LC842" class="line" lang="c"> <span class="n" style="color: #333;">pa_log_debug</span><span class="p">(</span><span class="s" style="color: #d14;">"Skip source stream setup while closing"</span><span class="p">);</span></span>
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843
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<pre style="margin: 0;">+<span id="LC843" class="line" lang="c"> <span class="k" style="font-weight: 600;">else</span></span>
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844
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<pre style="margin: 0;">+<span id="LC844" class="line" lang="c"> <span class="n" style="color: #333;">setup_stream</span><span class="p">(</span><span class="n" style="color: #333;">u</span><span class="p">);</span></span>
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833
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845
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<pre style="margin: 0;"> <span id="LC845" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span> <span class="mi" style="color: #099;">0</span><span class="p">;</span></span>
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846
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<pre style="margin: 0;"> <span id="LC846" class="line" lang="c"></span>
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847
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<pre style="margin: 0;"> <span id="LC847" class="line" lang="c"> <span class="p">}</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1007,7 +1019,17 @@ static int sink_process_msg(pa_msgobject *o, int code, void *data, int64_t offse</td>
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1019
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<pre style="margin: 0;"> <span id="LC1019" class="line" lang="c"> <span class="p">}</span></span>
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1008
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1020
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<pre style="margin: 0;"> <span id="LC1020" class="line" lang="c"></span>
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1021
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<pre style="margin: 0;"> <span id="LC1021" class="line" lang="c"> <span class="k" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">PA_SINK_MESSAGE_SETUP_STREAM</span><span class="p">:</span></span>
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<pre style="margin: 0;">-<span id="LC1010" class="line" lang="c"> <span class="n" style="color: #333;">setup_stream</span><span class="p">(</span><span class="n" style="color: #333;">u</span><span class="p">);</span></span>
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1022
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<pre style="margin: 0;">+<span id="LC1022" class="line" lang="c"> <span class="cm" style="color: #998; font-style: italic;">/* Skip stream setup if stream_fd has been invalidated.</span></span>
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1023
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<pre style="margin: 0;">+<span id="LC1023" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> This can occur if the stream has already been set up and</span></span>
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1024
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<pre style="margin: 0;">+<span id="LC1024" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> then immediately received POLLHUP. If the stream has</span></span>
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1025
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<pre style="margin: 0;">+<span id="LC1025" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> already been set up earlier, then this setup_stream()</span></span>
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1026
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<pre style="margin: 0;">+<span id="LC1026" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> call is redundant anyway, but currently the code</span></span>
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1027
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<pre style="margin: 0;">+<span id="LC1027" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> is such that this kind of unnecessary setup_stream()</span></span>
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1028
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<pre style="margin: 0;">+<span id="LC1028" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> calls can happen. */</span></span>
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1029
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<pre style="margin: 0;">+<span id="LC1029" class="line" lang="c"> <span class="k" style="font-weight: 600;">if</span> <span class="p">(</span><span class="n" style="color: #333;">u</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">stream_fd</span> <span class="o" style="font-weight: 600;"><</span> <span class="mi" style="color: #099;">0</span><span class="p">)</span></span>
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1030
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<pre style="margin: 0;">+<span id="LC1030" class="line" lang="c"> <span class="n" style="color: #333;">pa_log_debug</span><span class="p">(</span><span class="s" style="color: #d14;">"Skip sink stream setup while closing"</span><span class="p">);</span></span>
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1031
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<pre style="margin: 0;">+<span id="LC1031" class="line" lang="c"> <span class="k" style="font-weight: 600;">else</span></span>
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1032
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<pre style="margin: 0;">+<span id="LC1032" class="line" lang="c"> <span class="n" style="color: #333;">setup_stream</span><span class="p">(</span><span class="n" style="color: #333;">u</span><span class="p">);</span></span>
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1011
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1033
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<pre style="margin: 0;"> <span id="LC1033" class="line" lang="c"> <span class="k" style="font-weight: 600;">return</span> <span class="mi" style="color: #099;">0</span><span class="p">;</span></span>
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1012
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<td class="diff-line-num new_line" data-linenumber="1034" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
1034
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<pre style="margin: 0;"> <span id="LC1034" class="line" lang="c"> <span class="p">}</span></span>
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<td class="diff-line-num old_line" data-linenumber="1013" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
1013
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<td class="diff-line-num new_line" data-linenumber="1035" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
1035
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<pre style="margin: 0;"> <span id="LC1035" class="line" lang="c"></span>
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