unity-panel-service crashed with SIGSEGV in pthread_mutex_trylock()

[Jean-Baptiste Lallement]

I was reproducing bug 804009 with the sound indicator, clicking on the slider, closing the indicator and retrying a few times when this crash occurred.

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-services 4.0.1-0ubuntu3
ProcVersionSignature: Ubuntu 3.0-2.3-generic 3.0.0-rc4
Uname: Linux 3.0-2-generic i686
Architecture: i386
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,gnomecompat,imgpng,regex,resize,mousepoll,vpswitch,grid,move,resizeinfo,place,snap,animation,session,wall,expo,workarounds,ezoom,staticswitcher,fade,scale,unityshell]
Date: Fri Jul 1 11:03:56 2011
EcryptfsInUse: Yes
ExecutablePath: /usr/lib/unity/unity-panel-service
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.utf8
SegvAnalysis:
 Segfault happened at: 0x3a157c <pthread_mutex_trylock+12>: call 0x39d610 <__i686.get_pc_thunk.bx>
 PC (0x003a157c) ok
 source "0x39d610" (0x0039d610) ok
 destination "(%esp)" (0xbf43cfec) not located in a known VMA region (needed writable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 pthread_mutex_trylock () from /lib/i386-linux-gnu/libpthread.so.0
 g_mutex_trylock_posix_impl (mutex=0x9dad8a8) at /build/buildd/glib2.0-2.29.8/./gthread/gthread-posix.c:187
 g_mutex_lock_a (mem_size=12) at /build/buildd/glib2.0-2.29.8/./glib/gslice.c:413
 magazine_cache_pop_magazine (mem_size=12) at /build/buildd/glib2.0-2.29.8/./glib/gslice.c:671
 thread_memory_magazine1_reload (mem_size=12) at /build/buildd/glib2.0-2.29.8/./glib/gslice.c:754
Title: unity-panel-service crashed with SIGSEGV in pthread_mutex_trylock()
UpgradeStatus: Upgraded to oneiric on 2011-06-27 (3 days ago)
UserGroups: adm admin audio cdrom dialout dip floppy fuse libvirtd lpadmin netdev plugdev scanner sudo video

[Apport retracing service (apport)]

StacktraceTop:
 __pthread_mutex_trylock (mutex=0x9dad8a8) at pthread_mutex_trylock.c:30
 g_mutex_trylock_posix_impl (mutex=0x9dad8a8) at /build/buildd/glib2.0-2.29.8/./gthread/gthread-posix.c:187
 g_mutex_lock_a (mem_size=12) at /build/buildd/glib2.0-2.29.8/./glib/gslice.c:413
 magazine_cache_pop_magazine (mem_size=12) at /build/buildd/glib2.0-2.29.8/./glib/gslice.c:671
 thread_memory_magazine1_reload (mem_size=12) at /build/buildd/glib2.0-2.29.8/./glib/gslice.c:754

[Jean-Baptiste Lallement (jibel)]

I got it again today. I downloaded Fedora 15, the download dialog didn't popup and I tried to click on the Firefox menu show show this download dialog box, but the desktop froze and got this crash.

[bwashed (kjartan-hoie)]

Also, clicking some other indicator icon (e.g the battery icon) instead of clicking the volume icon the second time causes another set of indicator icons to appear.

[Neil J. Patel (njpatel)]

guys, just moved this to the bug we're using for tracking the fix across projects.