lightdm crashed with SIGSEGV in initialize_password_db()

[José Antonio]

LightDM took a long time to verify my password and after that this bug report appeared.

jose@JARR-Laptop:~$ lsb_release -rd
Description: Ubuntu oneiric (development branch)
Release: 11.10

jose@JARR-Laptop:~$ apt-cache policy lightdm
lightdm:
  Installed: 0.9.3-0ubuntu7
  Candidate: 0.9.3-0ubuntu7
  Version table:
 *** 0.9.3-0ubuntu7 0
        500 http://archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: lightdm 0.9.3-0ubuntu7
ProcVersionSignature: Ubuntu 3.0.0-9.14-generic 3.0.3
Uname: Linux 3.0.0-9-generic x86_64
NonfreeKernelModules: wl
Architecture: amd64
Date: Thu Aug 25 17:42:30 2011
Disassembly: => 0x0: Cannot access memory at address 0x0
ExecutablePath: /usr/sbin/lightdm
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110803.1)
ProcCmdline: lightdm
ProcEnviron: PATH=(custom, no user)
SegvAnalysis:
 Segfault happened at: 0x0: Cannot access memory at address 0x0
 PC (0x00000000) not located in a known VMA region (needed executable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: executing NULL VMA
Signal: 11
SourcePackage: lightdm
StacktraceTop:
 ?? ()
 ?? () from /lib/security/pam_smbpass.so
 initialize_password_db () from /lib/security/pam_smbpass.so
 pam_sm_authenticate () from /lib/security/pam_smbpass.so
 ?? () from /lib/x86_64-linux-gnu/libpam.so.0
Title: lightdm crashed with SIGSEGV in initialize_password_db()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

[Apport retracing service (apport)]

StacktraceTop:
 ?? ()
 pdb_get_methods_reload (reload=<optimized out>) at passdb/pdb_interface.c:179
 initialize_password_db (reload=<optimized out>, event_ctx=<optimized out>) at passdb/pdb_interface.c:1126
 pam_sm_authenticate (pamh=0x208e4f0, flags=<optimized out>, argc=<optimized out>, argv=<optimized out>) at pam_smbpass/pam_smb_auth.c:115
 _pam_dispatch_aux (use_cached_chain=<optimized out>, resumed=<optimized out>, h=0x2093350, flags=<optimized out>, pamh=0x208e4f0) at pam_dispatch.c:110

[Iain Hamilton (iain-foom)]

occurred here when I tried to switch user. When I entered the password there was no response after several minutes and no way of progressing or rolling back the process. Had to force a reboot from a terminal.

[Olli Kankare (o.k)]

This happens when you try to switch users.
Switching to terminal and restarting the lightdm service results in a lock-screen of the first user, from which you can log back in.

[Robert Ancell (robert-ancell)]

All the duplicates are in version 0.9.3, is this still occurring in 1.0.0?