[Bug 1313314] [NEW] lighdm login does not work with sssd and pam_kwallet

[Jan]

Public bug reported:

Description:    Ubuntu 14.04 LTS
Release:        14.04

# LANG=en apt-cache policy pam-kwallet
pam-kwallet:
  Installed: 0.0~git20140410-0ubuntu2
  Candidate: 0.0~git20140410-0ubuntu2
  Version table:
 *** 0.0~git20140410-0ubuntu2 0
        500 http://de.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
        100 /var/lib/dpkg/status

# LANG=en apt-cache policy lightdm
lightdm:
  Installed: 1.10.0-0ubuntu3
  Candidate: 1.10.0-0ubuntu3
  Version table:
 *** 1.10.0-0ubuntu3 0
        500 http://de.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
        100 /var/lib/dpkg/status


Hi, I'm using SSSD (Kerbeos + LDAP) to authenticate my users. Until
14.04 everything worked perfectly.

Since 14.04 the pam_kwallet module prevents my users from loggin in.
lightdm just says "wrong password. please try again".

This is my auth.log:

 Apr 27 13:09:41 jan2 lightdm: pam_succeed_if(lightdm:auth): requirement "user ingroup nopasswdlogin" not met by user "testuser"
Apr 27 13:09:41 jan2 lightdm: pam_unix(lightdm:auth): authentication failure; logname= uid=0 euid=0 tty=:0 ruser= rhost=  user=testuser
Apr 27 13:09:41 jan2 lightdm: pam_sss(lightdm:auth): authentication success; logname= uid=0 euid=0 tty=:0 ruser= rhost= user=testuser
Apr 27 13:09:41 jan2 lightdm: pam_kwallet(lightdm:auth): pam_sm_authenticate


and I'm seeing a segfault of lightdm in my syslog (i have attached the crash file):

Apr 27 13:09:41 jan2 kernel: [  457.034577] lightdm[4104]: segfault at 0
ip 00007facd4548be0 sp 00007fff1c2440b0 error 4 in
libc-2.19.so[7facd44d9000+1bc000]

If I remove pam_kwallet.so from /etc/pam.d/lightdm everything works as
expected.

** Affects: pam-kwallet (Ubuntu)
     Importance: Undecided
         Status: New

** Attachment added: "lightdm crash report"
   https://bugs.launchpad.net/bugs/1313314/+attachment/4098207/+files/_usr_sbin_lightdm.0.crash

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https://bugs.launchpad.net/bugs/1313314

Title:
  lighdm login does not work with sssd and pam_kwallet

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