[Samba] Bind creates a situation where SSSD Crashes du to samba_dnsupdate

[Rowland Penny]

On Sun, 2022-06-05 at 15:42 -0400, Zombie Ryushu via samba wrote:
> 
> > 
> > 
> The SSSD Daemon will crash with an Assertion failure if a DNS Entry 
> exists in Bind where in an Internal Domain in the 192.168.0.x subnet 
> points to a specific Domain. Such as:
> 
> pukey IN A 192.168.0.4.

There aren't supposed to be any dns entries in bind9 when using Samba
AD, they are supposed to be in AD.

> 
> Jun 05 15:23:15 olympia sssd[15008]: sssd_be: io.c:224: ber_flush2: 
> Assertion `SOCKBUF_VALID( sb )' failed.
> Jun 05 15:23:15 olympia be[15184]: Starting up
> Jun 05 15:23:25 olympia sssd[15184]: sssd_be: io.c:224: ber_flush2: 
> Assertion `SOCKBUF_VALID( sb )' failed.
> Jun 05 15:23:27 olympia be[15194]: Starting up
> Jun 05 15:23:37 olympia sssd[15194]: sssd_be: io.c:224: ber_flush2: 
> Assertion `SOCKBUF_VALID( sb )' failed.
> Jun 05 15:23:41 olympia be[15219]: Starting up
> 
> This is the error produced. sssd will cease functioning until the
> DNS 
> Entry is removed.
> 
> Active: failed (Result: exit-code) since Sun 2022-06-05 15:23:52
> EDT; 
> 33s ago
>      Process: 14997 ExecStart=/usr/sbin/sssd -i ${DEBUG_LOGGER} 
> (code=exited, status=1/FAILURE)
>     Main PID: 14997 (code=exited, status=1/FAILURE)

I am sorry, but sssd is not part of Samba, I suggest you report this to
the sssd-users mailing list.

> 
> samba_dnsupdate will cause this to happen.

It is supposed to.

Rowland