It crashes at this row:

p->timer_elapsed = r == 0;

And the only thing that could cause problems is if the p pointer is
invalid. It is used right before in the ppoll call, so maybe something
inside ppoll destroys the stack somehow...?

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to pulseaudio in Ubuntu.
https://bugs.launchpad.net/bugs/1239172

Title:
  pulseaudio crashed with SIGSEGV in pa_rtpoll_run()

Status in “pulseaudio” package in Ubuntu:
  New

Bug description:
  random error. Looks like an failure by race condition. Was not even
  using audio at the time.

  ProblemType: Crash
  DistroRelease: Ubuntu 13.10
  Package: pulseaudio 1:4.0-0ubuntu6
  ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
  Uname: Linux 3.11.0-12-generic i686
  ApportVersion: 2.12.5-0ubuntu1
  Architecture: i386
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  reiner    21223 F.... pulseaudio
  Date: Sat Oct 12 16:57:06 2013
  ExecutablePath: /usr/bin/pulseaudio
  InstallationDate: Installed on 2013-04-18 (176 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2)
  MarkForUpload: True
  ProcCmdline: /usr/bin/pulseaudio --start --log-target=syslog
  ProcEnviron:
   LANGUAGE=en_US:en
   PATH=(custom, user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  Signal: 11
  SourcePackage: pulseaudio
  StacktraceTop:
   pa_rtpoll_run () from /usr/lib/libpulsecore-4.0.so
   ?? () from /usr/lib/pulse-4.0/modules/libalsa-util.so
   ?? () from /usr/lib/i386-linux-gnu/pulseaudio/libpulsecommon-4.0.so
   start_thread (arg=0xb203eb40) at pthread_create.c:311
   clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:131
  Title: pulseaudio crashed with SIGSEGV in pa_rtpoll_run()
  UpgradeStatus: Upgraded to saucy on 2013-06-29 (105 days ago)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 12/20/2010
  dmi.bios.vendor: Phoenix Technologies Ltd.
  dmi.bios.version: 01GT.M026.20101220.RHU
  dmi.board.asset.tag: SAMSUNG
  dmi.board.name: N150P
  dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
  dmi.chassis.version: N/A
  dmi.modalias: 
dmi:bvnPhoenixTechnologiesLtd.:bvr01GT.M026.20101220.RHU:bd12/20/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnN150P:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnN150P:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:
  dmi.product.name: N150P
  dmi.product.version: Not Applicable
  dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

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