[Samba] Bind9 9.18.28 crashes after loading AD DNS Zone

[Matthias Kühne | Ellerhold Aktiengesellschaft]

Hello lovely samba-people,

this morning all of our DCs (debian bookworm) upgraded their bind9 
packages to 9.18.28 (from 9.18.24). Afterwards the named service would 
not come up successfully and crash after loading the DLZ:

Jul 26 07:32:12 rad-1.ad.ellerhold.lan named[1903]: sizing zone task 
pool based on 64 zones
Jul 26 07:32:12 rad-1.ad.ellerhold.lan named[1903]: Loading 'AD DNS 
Zone' using driver dlopen
Jul 26 07:32:13 rad-1.ad.ellerhold.lan named[1903]: free(): invalid size
Jul 26 07:32:13 rad-1.ad.ellerhold.lan systemd[1]: named.service: Main 
process exited, code=dumped, status=6/ABRT
Jul 26 07:32:13 rad-1.ad.ellerhold.lan systemd[1]: named.service: Failed 
with result 'core-dump'.

This was rather bad, because all of our DC did update at the same time 
and weve lost all DNS abilities... Downgrading to 9.18.24 fixes the 
issue and named works again.

I guess this crash happens because of the Samba DLZ? Were currently at 
Samba version 2:4.20.2+dfsg-7~mjt-deb12 .

Is this issue known? Can I somehow help to diagnose this?

Regards, Matthias Kühne.

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