[Samba] Auth fail getpwuid(3000007) failed

[Leander Schäfer]

Hi

sorry to bother, but all of a sudden after a fresh install of samba with 
the regular smb4.conf it keeps on failing when users try to authenticate:


smbclient -U MyUser \\\\MyServerName\\MyShare MyPassword
session setup failed: NT_STATUS_UNSUCCESSFUL

[...]

   check_ntlm_password:  authentication for user [MyUser] -> [MyUser] -> 
[MyUser] succeeded
[2014/05/02 10:29:40.930648,  3] 
../auth/ntlmssp/ntlmssp_sign.c:547(ntlmssp_sign_init)
   NTLMSSP Sign/Seal - Initialising with flags:
[2014/05/02 10:29:40.930671,  3] 
../auth/ntlmssp/ntlmssp_util.c:34(debug_ntlmssp_flags)
   Got NTLMSSP neg_flags=0x60088215
     NTLMSSP_NEGOTIATE_UNICODE
     NTLMSSP_REQUEST_TARGET
     NTLMSSP_NEGOTIATE_SIGN
     NTLMSSP_NEGOTIATE_NTLM
     NTLMSSP_NEGOTIATE_ALWAYS_SIGN
     NTLMSSP_NEGOTIATE_NTLM2
     NTLMSSP_NEGOTIATE_128
     NTLMSSP_NEGOTIATE_KEY_EXCH
[2014/05/02 10:29:40.930799,  4] ../source3/smbd/sec_ctx.c:424(pop_sec_ctx)
   pop_sec_ctx (0, 0) - sec_ctx_stack_ndx = 0
[2014/05/02 10:29:40.930876,  4] ../source3/smbd/sec_ctx.c:216(push_sec_ctx)
   push_sec_ctx(0, 0) : sec_ctx_stack_ndx = 1
[2014/05/02 10:29:40.930905,  4] ../source3/smbd/uid.c:495(push_conn_ctx)
   push_conn_ctx(0) : conn_ctx_stack_ndx = 0
[2014/05/02 10:29:40.930926,  4] ../source3/smbd/sec_ctx.c:316(set_sec_ctx)
   setting sec ctx (0, 0) - sec_ctx_stack_ndx = 1
[2014/05/02 10:29:40.930947,  5] 
../libcli/security/security_token.c:53(security_token_debug)
   Security token: (NULL)
[2014/05/02 10:29:40.930968,  5] 
../source3/auth/token_util.c:629(debug_unix_user_token)
   UNIX token of user 0
   Primary group is 0 and contains 0 supplementary groups
[2014/05/02 10:29:40.931099,  4] ../source3/smbd/sec_ctx.c:424(pop_sec_ctx)
   pop_sec_ctx (0, 0) - sec_ctx_stack_ndx = 0
[2014/05/02 10:29:40.931611,  1] 
../source3/auth/token_util.c:430(add_local_groups)
   SID S-1-5-21-2799780924-1191006566-1534516595-1102 -> 
getpwuid(3000007) failed
[2014/05/02 10:29:40.931654,  3] 
../source3/auth/token_util.c:316(create_local_nt_token_from_info3)
   Failed to finalize nt token
[2014/05/02 10:29:40.931677,  1] 
../source3/smbd/sesssetup.c:276(reply_sesssetup_and_X_spnego)
   Failed to generate session_info (user and group token) for session 
setup: NT_STATUS_UNSUCCESSFUL

[...]

What's wrong here?! Any hint is geartfully appreciated ;)

Kind Regards