Bug 76184 - pulseaudio-5.0 - segfault on module load/unload
Summary: pulseaudio-5.0 - segfault on module load/unload
Alias: None
Product: PulseAudio
Classification: Unclassified
Component: daemon (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: pulseaudio-bugs
QA Contact: pulseaudio-bugs
Depends on:
Reported: 2014-03-14 16:39 UTC by Alexander Tsoy
Modified: 2014-03-28 13:09 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:

backtrace (22.65 KB, text/plain)
2014-03-14 16:39 UTC, Alexander Tsoy
Fix 1/2 (1.04 KB, patch)
2014-03-15 07:41 UTC, Tanu Kaskinen
Details | Splinter Review
Fix 2/2 (2.82 KB, patch)
2014-03-15 07:42 UTC, Tanu Kaskinen
Details | Splinter Review
backtrace2 (21.31 KB, text/plain)
2014-03-17 10:05 UTC, Alexander Tsoy
Another fix (1.76 KB, patch)
2014-03-18 08:25 UTC, Tanu Kaskinen
Details | Splinter Review
Another fix (3.24 KB, patch)
2014-03-19 07:52 UTC, Tanu Kaskinen
Details | Splinter Review

Description Alexander Tsoy 2014-03-14 16:39:52 UTC
Created attachment 95817 [details]

pulseaudio-5.0 segfaults on startup when I login to the gnome session. BT is attached.
Comment 1 Alexander Tsoy 2014-03-14 16:50:27 UTC
My local default.pa:

$ cat ~/.config/pulse/default.pa 
#!/usr/bin/pulseaudio -nF

.include /etc/pulse/default.pa

load-module module-tunnel-sink server=
unload-module module-zeroconf-publish

So module-zeroconf-publish is loaded in global default.pa and then unloaded in the local one. Commenting out "unload-module module-zeroconf-publish" fixes segfaults.
Comment 2 Alexander Tsoy 2014-03-14 21:32:15 UTC
Another way to reproduce this crash:

$ echo -e 'load-module module-zeroconf-publish\nunload-module module-zeroconf-publish' | pacmd
Comment 3 Tanu Kaskinen 2014-03-15 07:40:06 UTC
Thanks for the report! I sent a couple of patches that should fix this bug to the mailing list (not yet reached the list at the time of writing), I'll attach them here also.
Comment 4 Tanu Kaskinen 2014-03-15 07:41:36 UTC
Created attachment 95840 [details] [review]
Fix 1/2
Comment 5 Tanu Kaskinen 2014-03-15 07:42:00 UTC
Created attachment 95841 [details] [review]
Fix 2/2
Comment 6 Alexander Tsoy 2014-03-17 10:05:10 UTC
Created attachment 95919 [details]

Thank you for the quick response! These patches fixed the crash of pulse at startup. However I still can reproduce the crash using command from comment 2. Attaching the new backtrace.
Comment 7 Tanu Kaskinen 2014-03-18 08:25:17 UTC
I'll attach another patch. It should finally fix also the pacmd test case.

module-zeroconf-publish appears to still have threading issues, but I couldn't reproduce the crash any more. I'll fix those remaining issues some time later.
Comment 8 Tanu Kaskinen 2014-03-18 08:25:51 UTC
Created attachment 95990 [details] [review]
Another fix
Comment 9 Tanu Kaskinen 2014-03-19 07:52:36 UTC
Created attachment 96028 [details] [review]
Another fix

The previous patch (the mainloop one) isn't the best way to fix the issue, here's a better patch.
Comment 10 Tanu Kaskinen 2014-03-28 13:09:42 UTC
The patches have now been committed.

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