[Samba] IDMAP problems after upgrade to Debian jessie

[Lukas Haase]

Hi,

I have been running a Debian 3 server without problems for a long time.
Now, after upgrading to Debian jessie (Debian 4.2.14) I cannot log in
any more:

smbclient -U admin -L //localhost/
Enter admin's password:
session setup failed: NT_STATUS_UNSUCCESSFUL

In the logs:

[2017/01/14 23:37:21.636022,  2]
../source3/auth/auth.c:305(auth_check_ntlm_password)
  check_ntlm_password:  authentication for user [admin] -> [admin] ->
[admin] succeeded
[2017/01/14 23:37:21.637610,  1]
../source3/auth/token_util.c:430(add_local_groups)
  SID S-1-5-21-3909901412-745783496-1225843668-500 -> getpwuid(25003) failed

This is odd because the correct UID for this SID would be 1013.

The relevant Samba config thus far was:

passdb backend = ldapsam:ldap://ldap/
ldap ssl = Start_tls
obey pam restrictions = no
ldap admin dn = uid=admin,dc=intra
ldap suffix = dc=intra
ldap group suffix = ou=groups
ldap user suffix = ou=users
ldap machine suffix = ou=machines
ldap idmap suffix = ou=idmap
idmap uid = 25000-27000
idmap gid = 25000-27000

However, ou=idmap in the LDAP tree is empty and winbind was running.

I thought maybe it is because of the deprecated idmap uid option but no
matter what I set for "idmap config", wbinfo always returns the wrong UID:

# wbinfo --sid-to-uid S-1-5-21-3909901412-745783496-1225843668-500
25003


For example, I tried

idmap config * : backend = tdb
idmap config * : range = 25000 27000

or

idmap config * : backend = rid
idmap config * : range = 0 1000

The output just does not change.

Any help would be appreciated. Thanks!

Luke