gdm-simple-slave crashed with SIGSEGV in g_object_ref()

[Kelly Hyde]

After installing updates from July 16 on Ubuntu GNOME 13.10 and rebooting from Software Updater, GDM failed to load and got stuck on the initial GNOME default wallpaper splash screen. I could drop to tty and I tried "service restart gdm" but this just made the screen flicker and pushed me back to Plymouth.

Apport is claiming that I've modified /etc/init.d/gdm but I've never touched it.

I also attempted "startx" in tty, which failed and mentioned something about a timeout on .Xauthority.

After force shutting down the computer and booting up again, GDM loaded successfully without changing anything, so I'm still not sure why this happened.

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: gdm 3.8.1.1-0ubuntu5
ProcVersionSignature: Ubuntu 3.10.0-3.12-generic 3.10.1
Uname: Linux 3.10.0-3-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.11-0ubuntu1
Architecture: amd64
Date: Wed Jul 17 13:06:34 2013
ExecutablePath: /usr/lib/gdm/gdm-simple-slave
InstallationDate: Installed on 2013-06-06 (41 days ago)
InstallationMedia: Ubuntu-GNOME 13.04 "Raring Ringtail" - Release amd64 (20130424)
MarkForUpload: True
ProcCmdline: /usr/lib/gdm/gdm-simple-slave --display-id /org/gnome/DisplayManager/Displays/_0
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SegvAnalysis:
 Segfault happened at: 0x7f427810f8ca <vfprintf+154>: callq 0x7f4278159b30 <strchrnul>
 PC (0x7f427810f8ca) ok
 source "0x7f4278159b30" (0x7f4278159b30) ok
 destination "(%rsp)" (0x7fffee011ff0) not located in a known VMA region (needed writable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: writing unknown VMA
Signal: 11
SourcePackage: gdm
StacktraceTop:
 g_object_ref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? ()
 ?? ()
 ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 g_signal_emit_valist () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
Title: gdm-simple-slave crashed with SIGSEGV in g_object_ref()
UpgradeStatus: Upgraded to saucy on 2013-06-28 (19 days ago)
UserGroups:

mtime.conffile..etc.init.d.gdm: 2013-07-12T06:51:14

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1160356, so is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Please continue to report any other bugs you may find.