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

[Zombie Ryushu]

On 6/4/22 23:11, Zombie Ryushu via samba wrote:
>  We WERE able to get Kerberized Bind Zone Updates working for the very 
> first time.
>
>  (GSS-TSIG)
>
> What this means is that samba_dnsupdate -actually works- just with 
> straight Bind.
>
>  That's had a bad secondary effect. Samba injects a record that looks 
> like:
>
>  pukey IN A 192.168.0.4 into Bind.
>
> This crashes SSSD with an Assertion failure. How do I remove this a 
> DNS entry from Samba?
>
>
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.

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)

samba_dnsupdate will cause this to happen.