[Samba] Could not convert sid S-0-0: NT_STATUS_NONE_MAPPED every time sudo is executed

[Rowland Penny]

On Tue, 25 Mar 2025 12:28:07 -0400
smodep--- via samba <samba at lists.samba.org> wrote:

> I recently upgraded my Samba Domain Member server that provides a
> share for Windows clients to write their backups to. The backup
> clients use an AD credential to connect to the share, so individuals
> are not connecting to the share. This works well and has for years.
> However, when I upgraded to Samba v4.21.3 (built from source, same
> distro as my Samba AD DCs), I started getting my logs cluttered up
> with errors:
> 
>  
> 
> Mar 25 12:21:29 hennessy winbindd[18349]: [2025/03/25
> 12:21:29.129086,  1, traceid=53]
> ../../source3/winbindd/winbindd_getgroups.c:262(winbindd_getgroups_recv)
> 
> Mar 25 12:21:29 hennessy winbindd[18349]:  Could not convert sid
> S-0-0: NT_STATUS_NONE_MAPPED
> 
>  
> 
> These messages appear whenever any sudo command is executed on the
> system. I am using the rid backend and setup the server as per
> https://wiki.samba.org/index.php/Setting_up_Samba_as_a_Domain_Member
> 
>  
> 
>  
> 
> I figure I missed something simple. Any ideas how I can make these
> stop?
> 

Try upgrading Samba.
The easiest way would be to use the Tranquil IT packages, see here:

https://samba.tranquil.it/doc/en/samba_config_server/redhat/server_install_samba_redhat.html

Rowland