[Bug 1003296] [NEW] lightdm crashed with SIGSEGV in _pam_winbind_change_pwd() when password is expiring

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My precise client is member of a Windows Domain. A domain user can login
using samba/winbind without problem in tty and via lightdm if the user
password is ok.

If the password is expiring a domain user logs in correctly via TTY,
with a message "Your password is expiring in 10 days". if tries with
lightdm the user gets the message "Your password is expiring in 10
days", but then returns to the username request.

On /var/log/syslog i get:

May 23 08:50:52 tv52605 kernel: [ 1046.645230] lightdm[2415]: segfault
at 0 ip b73d976a sp bfd66fa8 error 4 in libc-2.15.so[b729c000+19f000]

for each time the user tries to login with the domain user credentials.

Expected behaviour:

the user sees the message  "Your password is expiring in 10 days", then
logs in (like gdm in ubuntu 10.04 does).

I attach the crash file i found in /var/crash/ (that i'm unable to send
via apport-bug tue to same strange bug)

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

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lightdm crashed with SIGSEGV in _pam_winbind_change_pwd() when password is expiring
https://bugs.launchpad.net/bugs/1003296
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