[Bug 937933] Re: pulseaudio crashed with SIGSEGV (parallel calls to dbus_bus_get_private)

[David Henningsson]

I have created a small test case and sent bug upstream:
https://bugs.freedesktop.org/show_bug.cgi?id=47060

** Summary changed:

- pulseaudio crashed with SIGSEGV (probably race in dbus library)
+ pulseaudio crashed with SIGSEGV (parallel calls to dbus_bus_get_private)

** Bug watch added: freedesktop.org Bugzilla #47060
   https://bugs.freedesktop.org/show_bug.cgi?id=47060

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https://bugs.launchpad.net/bugs/937933

Title:
  pulseaudio crashed with SIGSEGV (parallel calls to
  dbus_bus_get_private)

Status in “dbus” package in Ubuntu:
  Triaged

Bug description:
  Jack audio server.  Low latency kernel.  Using Ubuntu then Lubuntu
  via- wubi.exe

  Lubuntu was not available through wubi.exe Only ubuntu.  All other
  variations produced errors.  I think needed audio packages for
  multitrack recording via-Ardour and Rosegarden create unstable system
  state.

  Jack crashes pulse audio adapter ... rebooting seems to help
  sometimes.

  ProblemType: Crash
  DistroRelease: Ubuntu 12.04
  Package: pulseaudio 1:1.1-0ubuntu9
  ProcVersionSignature: Ubuntu 3.0.0-13.21ppa1~natty1-lowlatency 3.0.6
  Uname: Linux 3.0.0-13-lowlatency x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.92-0ubuntu1
  Architecture: amd64
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf0520000 irq 49'
     Mixer name	: 'Analog Devices AD1884A'
     Components	: 'HDA:11d4184a,103c3034,00100200'
     Controls      : 34
     Simple ctrls  : 20
  CrashCounter: 1
  Date: Tue Feb 21 11:46:52 2012
  ExecutablePath: /usr/bin/pulseaudio
  ProcCmdline: /usr/bin/pulseaudio --start --log-target=syslog
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SegvAnalysis:
   Segfault happened at: 0x7fc58dfd15ee:	mov    %rdx,0x8(%rax)
   PC (0x7fc58dfd15ee) ok
   source "%rdx" ok
   destination "0x8(%rax)" (0xc46c000000000008) not located in a known VMA region (needed writable region)!
   Stack memory exhausted (SP below stack segment)
  SegvReason: writing unknown VMA
  Signal: 11
  SourcePackage: pulseaudio
  StacktraceTop:
   ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
   ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
   ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
   ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
   ?? () from /lib/x86_64-linux-gnu/libdbus-1.so.3
  Title: pulseaudio crashed with SIGSEGV
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
  dmi.bios.date: 03/05/2009
  dmi.bios.vendor: Hewlett-Packard
  dmi.bios.version: 786G1 v01.16
  dmi.board.asset.tag: 2UA92918QC
  dmi.board.name: 3031h
  dmi.board.vendor: Hewlett-Packard
  dmi.chassis.asset.tag: 2UA92918QC
  dmi.chassis.type: 4
  dmi.chassis.vendor: Hewlett-Packard
  dmi.modalias: dmi:bvnHewlett-Packard:bvr786G1v01.16:bd03/05/2009:svnHewlett-Packard:pnHPCompaqdc7900SmallFormFactor:pvr:rvnHewlett-Packard:rn3031h:rvr:cvnHewlett-Packard:ct4:cvr:
  dmi.product.name: HP Compaq dc7900 Small Form Factor
  dmi.sys.vendor: Hewlett-Packard

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