indicator-session-service crashed with SIGSEGV in strlen()

[Dave Lee]

Happened after initial log on after power up.

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: indicator-session 12.10.5+14.04.20140324-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-20.42-generic 3.13.7
Uname: Linux 3.13.0-20-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14-0ubuntu1
Architecture: amd64
Date: Wed Apr 2 16:02:54 2014
ExecutablePath: /usr/lib/x86_64-linux-gnu/indicator-session/indicator-session-service
InstallationDate: Installed on 2014-03-28 (4 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
ProcCmdline: /usr/lib/x86_64-linux-gnu/indicator-session/indicator-session-service
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/false
SegvAnalysis:
 Segfault happened at: 0x7f729bc0392a <strlen+42>: movdqu (%rax),%xmm12
 PC (0x7f729bc0392a) ok
 source "(%rax)" (0x00000001) not located in a known VMA region (needed readable region)!
 destination "%xmm12" ok
 Stack memory exhausted (SP below stack segment)
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: indicator-session
StacktraceTop:
 strlen () at ../sysdeps/x86_64/strlen.S:106
 g_strdup () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgio-2.0.so.0
 ffi_call_unix64 () from /usr/lib/x86_64-linux-gnu/libffi.so.6
 ffi_call () from /usr/lib/x86_64-linux-gnu/libffi.so.6
Title: indicator-session-service crashed with SIGSEGV in strlen()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 strlen () at ../sysdeps/x86_64/strlen.S:106
 g_strdup (str=0x1 <Address 0x1 out of bounds>) at /build/buildd/glib2.0-2.40.0/./glib/gstrfuncs.c:355
 schedule_call_in_idle (call_type=CALL_TYPE_NAME_VANISHED, client=0x21ae1b0) at /build/buildd/glib2.0-2.40.0/./gio/gdbusnamewatching.c:192
 do_call (client=0x21ae1b0, call_type=CALL_TYPE_NAME_VANISHED) at /build/buildd/glib2.0-2.40.0/./gio/gdbusnamewatching.c:213
 ffi_call_unix64 () at ../src/x86/unix64.S:76

[Rafal (1szafarz)]

That may help (works in my case):

sudo dpkg --purge indicator-session
sudo apt-get install indicator-session

[Launchpad Janitor (janitor)]

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

[Matt (mforrest)]

I have the same issue, but may have found the source & potential workaround.

When I use a monolithic site-wide passwd file, indicator-session crashes. When I strip it down to just a local account, everything is fine. After I stop showing the users for quick user switching, it stops crashing!

Possible workaround: Run the command below as the affected user.
dconf write /apps/indicator-session/user-show-menu false

I've actually applied this as a manditory setting on a system-wide level. Apply the attached tarball, then run 'sudo dconf update'

[Sebastien Bacher (seb128)]

Interesting, could you share your passwd file or a modified version that is enough to expose the issue?