[Oneric] unity-panel-service crashed with SIGSEGV in getenv()

[HaruSiga77]

kernel 3.0.0-7.8
updated 3:20-ish on July 28
was starting synaptic

The bug report has been sending four reports on the same thing in a matter of seconds. There was some kind of message upon restarting that the "keyboard" was being toggled by someone. I think that counts as security as passwords could be divulged through keyloggers. I can't get the message back, nor did I even acknowledged it's closure. Can someone close dialog boxes outside of the internal X? That is to say can someone mess with your computer even though computer sharing is off?

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: unity-services 4.4.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-7.8-generic 3.0.0
Uname: Linux 3.0.0-7-generic x86_64
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,mousepoll,vpswitch,regex,animation,snap,expo,move,compiztoolbox,place,grid,imgpng,gnomecompat,wall,ezoom,workarounds,staticswitcher,resize,fade,unitymtgrabhandles,scale,session,unitydialog,unityshell]
CrashCounter: 1
Date: Thu Jul 28 15:10:52 2011
EcryptfsInUse: Yes
ExecutablePath: /usr/lib/unity/unity-panel-service
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110727)
ProcCmdline: /usr/lib/unity/unity-panel-service
ProcEnviron:
 SHELL=/bin/bash
 LANG=en_US.UTF-8
SegvAnalysis:
 Segfault happened at: 0x7faac3865da0 <getenv+144>: cmp 0x0(%rbp),%r13w
 PC (0x7faac3865da0) ok
 source "0x0(%rbp)" (0x000000e0) not located in a known VMA region (needed readable region)!
 destination "%r13w" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: unity
StacktraceTop:
 getenv () from /lib/x86_64-linux-gnu/libc.so.6
 ?? () from /lib/x86_64-linux-gnu/libc.so.6
 ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 g_type_class_ref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_object_new_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: unity-panel-service crashed with SIGSEGV in getenv()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 getenv (name=0x7faac398e8f7 "NGUAGE") at getenv.c:90
 guess_category_value (domainname=0x7faac3c60440 "glib20", msgid1=0x7faac464272b "unique-name", msgid2=0x0, plural=0, n=0, category=5) at dcigettext.c:1359
 __dcigettext (domainname=0x7faac3c60440 "glib20", msgid1=0x7faac464272b "unique-name", msgid2=0x0, plural=0, n=0, category=5) at dcigettext.c:575
 g_dbus_connection_class_init (klass=<value optimized out>) at /build/buildd/glib2.0-2.29.14/./gio/gdbusconnection.c:775
 g_dbus_connection_class_intern_init (klass=<value optimized out>) at /build/buildd/glib2.0-2.29.14/./gio/gdbusconnection.c:452

[Neil J. Patel (njpatel)]

This bug seems to be in glibc, looking at Google and other LP bugs with the same trace (http://goo.gl/sTVD7). Leaving on Unity to track.

[leonhardt (todd-leonhardt)]

Got this bug as soon as I logged in.

[Allison Karlitskaya (desrt)]

Is Unity doing a setenv() anywhere? My best guess is that you're hitting a race between getenv() in a thread and setenv() in another thread.

[Allison Karlitskaya (desrt)]

see: https://bugzilla.gnome.org/show_bug.cgi?id=659326

[Didier Roche-Tolomelli (didrocks)]

yes Ryan, there are even some unsetenv() in the service:

$ grep -r setenv services/*
services/panel-a11y.c: g_unsetenv ("NO_AT_BRIDGE");
services/panel-a11y.c: g_unsetenv ("NO_GAIL");
services/panel-main.c: g_unsetenv("UBUNTU_MENUPROXY");
services/panel-main.c: g_setenv ("NO_AT_BRIDGE", "1", TRUE);
services/panel-main.c: g_unsetenv ("NO_GAIL");

[melcior (melciorsentis)]

any one has touched the kb during the process

On dj 22 set 2011 12:16:02 CEST, Neil J. Patel wrote:
> ** Changed in: unity
> Assignee: (unassigned) => Neil J. Patel (njpatel)
>
> ** Changed in: unity
> Status: Confirmed => In Progress
>

[Susan Cragin (susancragin)]

I didn't get this bug until this morning's updates. 23 Sept 2011 8:40 EST updated.

[David Gomes (davidgomes)]

I just got this on unity 4.16.0, Oneiric.

[Launchpad Janitor (janitor)]

This bug was fixed in the package unity - 4.18.0-0ubuntu1

---------------
unity (4.18.0-0ubuntu1) oneiric; urgency=low

  * New upstream release.
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    - Start ...