[Bug 1056070] [NEW] segfault in samba with Active Directory users

[TV]

Public bug reported:

I'm using Samba (3.6.3-2ubuntu2.3) in Ubuntu 12.04.1 LTS (fresh install).
The server has joinded succesfully the Active Directory Domain.

Samba.conf global,

[global]
   workgroup = XXX
   server string = %h server
   dns proxy = no
   log level = 1
   log file = /var/log/samba/log.%m
   max log size = 1000
   syslog = 0
   panic action = /usr/share/samba/panic-action %d

   security = ADS
   realm = XXX.LOCAL
   password server = svr-dom.xxx.local
   winbind separator = +
   winbind cache time = 300
   winbind use default domain = yes
   winbind refresh tickets = yes
   client use spnego = yes
   winbind use default domain = yes
   domain master = no
   local master = no
   preferred master = no
   winbind enum groups = yes
   winbind enum users = yes
   winbind use default domain = no
   idmap uid = 10000-20000
   idmap gid = 10000-20000
   template shell = /bin/false
   encrypt passwords = true
   passdb backend = tdbsam
   obey pam restrictions = yes
   unix password sync = yes
   passwd program = /usr/bin/passwd %u
   passwd chat = *Enter\snew\s*\spassword:* %n\n *Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
   pam password change = yes
   client lanman auth = yes

A sample share:

[backup]
   comment = backup
   read only = no
   path = /home/backup
   guest ok = no
   browseable = yes
   create mask = 0600
   directory mask = 0700
   valid users = XXX+administrateur,besr

Samba shares with Active Directory users works fine, but i can see in
the log files  segfault :

http://paste.ubuntu.com/1226116/

I don't have these errors with  linux "local" user. For example with
user "besr" it's ok.

Let me know if i can more detailed test for this issue. I have the
feeling taht this segfault cause perfomance issue, but i'm not sure yet.
Still investigating.

** Affects: samba (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1056070

Title:
  segfault in samba with Active Directory users

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