[Samba4] Named reload causes DLZ shutdown

[Amitay Isaacs]

Hi Brian,

On Tue, May 22, 2012 at 1:18 AM, Brian C. Huffman
<bhuffman at etinternational.com> wrote:
> I've seen this a few times, and it seems to be repeatable.  If I do a named
> reload, it causes DLZ for samba to shut down, and shortly afterwards named
> itself dies:
>
> [root at samba01 cron.daily]# /sbin/service named reload
> Reloading named:                                           [  OK  ]
> [root at samba01 cron.daily]# tail -21 /var/log/messages
> May 21 11:14:01 samba01 named[17989]: received control channel command
> 'reload'
> May 21 11:14:01 samba01 named[17989]: loading configuration from
> '/etc/named.conf'
> May 21 11:14:01 samba01 named[17989]: reading built-in trusted keys from
> file '/etc/named.iscdlv.key'
> May 21 11:14:01 samba01 named[17989]: using default UDP/IPv4 port range:
> [1024, 65535]
> May 21 11:14:01 samba01 named[17989]: using default UDP/IPv6 port range:
> [1024, 65535]
> May 21 11:14:01 samba01 named[17989]: no IPv6 interfaces found
> May 21 11:14:01 samba01 named[17989]: sizing zone task pool based on 6 zones
> May 21 11:14:01 samba01 named[17989]: Loading 'AD DNS Zone' using driver
> dlopen
> May 21 11:14:01 samba01 named[17989]: samba_dlz: started for DN
> DC=xmen,DC=eti
> May 21 11:14:01 samba01 named[17989]: samba_dlz: starting configure
> May 21 11:14:01 samba01 named[17989]: samba_dlz: configured writeable zone
> '15.168.192.in-addr.arpa'
> May 21 11:14:01 samba01 named[17989]: samba_dlz: configured writeable zone
> 'xmen.eti'
> May 21 11:14:01 samba01 named[17989]: samba_dlz: configured writeable zone
> '_msdcs.xmen.eti'
> May 21 11:14:01 samba01 named[17989]: using built-in DLV key for view
> _default
> May 21 11:14:01 samba01 named[17989]: Warning:
> 'empty-zones-enable/disable-empty-zone' not set: disabling RFC 1918 empty
> zones
> May 21 11:14:01 samba01 named[17989]: zone 15.168.192.in-addr.arpa/NONE:
> (other) removed
> May 21 11:14:01 samba01 named[17989]: zone xmen.eti/NONE: (other) removed
> May 21 11:14:01 samba01 named[17989]: zone _msdcs.xmen.eti/NONE: (other)
> removed
> May 21 11:14:01 samba01 named[17989]: reloading configuration succeeded
> May 21 11:14:01 samba01 named[17989]: reloading zones succeeded
> May 21 11:14:01 samba01 named[17989]: samba_dlz: shutting down
>
> Any ideas why this might happen?

Named crash was caused by incorrectly freeing the state information in
DLZ_BIND9 module. The patches to fix this error are in my dns-wip
branch.

   http://git.samba.org/?p=amitay/samba.git;a=shortlog;h=refs/heads/dns-wip

Please let me know if the patch fixes the named crash.

Amitay.