unity-settings-daemon crashed with SIGSEGV in malloc_consolidate()

[Luis Flores III]

I booted the system and got this error.

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: unity-settings-daemon 14.04.0+14.04.20140310-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-17.37-generic 3.13.6
Uname: Linux 3.13.0-17-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Mar 14 11:03:04 2014
ExecutablePath: /usr/lib/unity-settings-daemon/unity-settings-daemon
ProcCmdline: /usr/lib/unity-settings-daemon/unity-settings-daemon
ProcEnviron:
 PATH=(custom, user)
 LANGUAGE=en_US
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f0b5c9ae583 <malloc_consolidate+307>: cmp 0x18(%rax),%rbx
 PC (0x7f0b5c9ae583) ok
 source "0x18(%rax)" (0x7f0b5ccee7e80018) not located in a known VMA region (needed readable region)!
 destination "%rbx" ok
SegvReason: reading unknown VMA
Signal: 11
SourcePackage: unity-settings-daemon
StacktraceTop:
 malloc_consolidate (av=av@entry=0x7f0b5ccee760 <main_arena>) at malloc.c:4157
 _int_malloc (av=av@entry=0x7f0b5ccee760 <main_arena>, bytes=bytes@entry=1056) at malloc.c:3423
 __libc_calloc (n=<optimized out>, elem_size=<optimized out>) at malloc.c:3219
 pa_xmalloc0 () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-4.0.so
 pa_hashmap_new () from /usr/lib/x86_64-linux-gnu/pulseaudio/libpulsecommon-4.0.so
Title: unity-settings-daemon crashed with SIGSEGV in malloc_consolidate()
UpgradeStatus: Upgraded to trusty on 2013-12-06 (97 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo

[Apport retracing service (apport)]

StacktraceTop:
 malloc_consolidate (av=av@entry=0x7f0b5ccee760 <main_arena>) at malloc.c:4157
 _int_malloc (av=av@entry=0x7f0b5ccee760 <main_arena>, bytes=bytes@entry=1056) at malloc.c:3423
 __libc_calloc (n=<optimized out>, elem_size=<optimized out>) at malloc.c:3219
 pa_xmalloc0 (size=<optimized out>) at pulse/xmalloc.c:76
 pa_hashmap_new (hash_func=0x7f0b3f7652e0 <pa_idxset_string_hash_func>, compare_func=0x7f0b3f765310 <pa_idxset_string_compare_func>) at pulsecore/hashmap.c:60

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Marco Russo (russomarco)]

I don't know if this could be of any help, but after this crash all keyboard shortcuts stopped working, even Ctrl+Alt+T for terminal.

[Davi Medrade (davimedrade)]

In my system, running Vivid, the SegvAnalysis shows the source as "0x18(%rax)", but the address is 0x00000018 (which it also says it's not located in a known VMA). The StacktraceTop shows pa_hashmap_new_full instead of pa_hashmap_new. Apart from that, the details are basically identical to those of this bug report.

[Daniel van Vugt (vanvugt)]

Incomplete. Unfortunately crashing inside malloc means the process heap had already become corrupt some time before the crash happened. So we are unable to debug the origin of the heap corruption here without exact detailed steps to reproduce the problem.

[Launchpad Janitor (janitor)]

[Expired for pulseaudio (Ubuntu) because there has been no activity for 60 days.]