Bug 521185

Summary: Pulseaudio unstable under concurrent load
Product: [Fedora] Fedora Reporter: Lubomir Rintel <lkundrak>
Component: pulseaudioAssignee: Lennart Poettering <lpoetter>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: rawhideCC: lkundrak, lpoetter, mschmidt, wtogami
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Target Release: ---   
Hardware: All   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2009-09-19 12:17:56 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Lubomir Rintel 2009-09-04 06:59:41 UTC
Description of problem:

While attempting to reproduce a Pulseaudio daemon crash I noticed that Rawhide Pulseaudio can be crashed rather easily, by spawning an amount of client that play sound concurrently.

Version-Release number of selected component (if applicable):

pulseaudio-0.9.16-13.test7.fc12.i686
kernel-2.6.31-0.190.rc8.fc12.i686
alsa-lib-1.0.21-1.fc12.i686
glibc-2.10.90-19.i686

How reproducible:

Always been able to reproduce the crash with 100 clients on an IBM T41 laptop.

Steps to Reproduce:

for i in $(seq 1 50); do aplay /usr/share/sounds/alsa/Noise.wav & done
  
Actual results:

[lkundrak@localhost ~]$ pulseaudio
N: alsa-sink.c: Device hw:1 is modem, refusing further initialization.
N: alsa-source.c: Device hw:1 is modem, refusing further initialization.
N: alsa-sink.c: Increasing wakeup watermark to 30.00 ms
N: alsa-sink.c: Increasing wakeup watermark to 40.00 ms
N: alsa-sink.c: Increasing wakeup watermark to 50.00 ms
N: alsa-sink.c: Increasing wakeup watermark to 60.00 ms
N: alsa-source.c: Increasing wakeup watermark to 30.00 ms
N: alsa-sink.c: Increasing wakeup watermark to 70.00 ms
N: alsa-source.c: Increasing wakeup watermark to 40.00 ms
N: alsa-sink.c: Increasing wakeup watermark to 80.00 ms
N: alsa-source.c: Increasing wakeup watermark to 50.00 ms
E: mainloop.c: Assertion '*_head == _item' failed at pulse/mainloop.c:538, function cleanup_io_events(). Aborting.
Aborted

[lkundrak@localhost ~]$ pulseaudio
W: pid.c: Stale PID file, overwriting.
N: alsa-sink.c: Device hw:1 is modem, refusing further initialization.
N: alsa-source.c: Device hw:1 is modem, refusing further initialization.
N: alsa-sink.c: Increasing wakeup watermark to 30.00 ms
N: alsa-sink.c: Increasing wakeup watermark to 40.00 ms
N: alsa-sink.c: Increasing wakeup watermark to 50.00 ms
N: alsa-source.c: Increasing wakeup watermark to 30.00 ms
N: alsa-source.c: Increasing wakeup watermark to 40.00 ms
N: alsa-sink.c: Increasing wakeup watermark to 60.00 ms
Segmentation fault

[lkundrak@localhost ~]$ ulimit -c
unlimited

[lkundrak@localhost ~]$ pulseaudio
W: pid.c: Stale PID file, overwriting.
N: alsa-sink.c: Device hw:1 is modem, refusing further initialization.
N: alsa-source.c: Device hw:1 is modem, refusing further initialization.
N: alsa-sink.c: Increasing wakeup watermark to 30.00 ms
N: alsa-sink.c: Increasing wakeup watermark to 40.00 ms
N: alsa-sink.c: Increasing wakeup watermark to 50.00 ms
N: alsa-source.c: Increasing wakeup watermark to 30.00 ms
*** glibc detected *** pulseaudio: free(): invalid next size (fast): 0x0830ffa0 ***
*** glibc detected *** pulseaudio: corrupted double-linked list: 0x0830ff98 ***

I'm not attaching stack traces since the installation is too disk-space constrained to install the -debuginfo packages and I believe you'll be able to reproduce easily.

Comment 1 Lubomir Rintel 2009-09-17 05:42:16 UTC
*** Bug 523855 has been marked as a duplicate of this bug. ***

Comment 2 Lennart Poettering 2009-09-18 21:04:03 UTC
Hm, indeed. 

No I wished vg would work on rawhide.

Comment 3 Lennart Poettering 2009-09-19 12:17:56 UTC
Fixed in 0.9.18 which should be in rawhide by now.