[Samba] samba 4.11.4 Bad talloc magic value - unknown value

Andrei Popa ierdnah at gmail.com
Tue Jan 14 17:36:28 UTC 2020


Today I just did an apt-get update and upgrade before compiling samba and the error still persist.
Thank you for the suggestion, this will be the way to go if nothing works, until then, is there a way that I can debug this error in order to find the problem ?

> On 14 Jan 2020, at 18:21, Rowland penny via samba <samba at lists.samba.org> wrote:
> 
> On 14/01/2020 16:06, Andrei Popa via samba wrote:
>> Hi,
>> 
>> I’ve build samba 4.11.4 from source on a Ubuntu 18.04.3 and I’m using it as a domain controller.
>> There are 3 domain controllers build the same way and all there are getting this error.
>> The replication between them is ok and the ldap services are working ok.
>> 
>> At every a couple of minutes I’m getting the following error.
>> What could be the cause and how can I fix it ?
>> After the error I've written more detailed information about samba installation and configuration.
>> Thank you !
>> 
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]: [2020/01/14 17:20:13.304916,  0] ../../source4/lib/cmdline/popt_common.c:74(popt_s4_talloc_log_fn)
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:   Bad talloc magic value - unknown value
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]: [2020/01/14 17:20:13.305299,  0] ../../lib/util/fault.c:132(smb_panic_default)
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:   smb_panic_default: PANIC (pid 10286): Bad talloc magic value - unknown value
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]: [2020/01/14 17:20:13.307672,  0] ../../lib/util/fault.c:265(log_stack_trace)
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:   BACKTRACE: 64 stack frames:
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #0 /usr/local/samba/lib/libsamba-util.so.0(log_stack_trace+0x2e) [0x7fcd8f072bad]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #1 /usr/local/samba/lib/libsamba-util.so.0(+0x20933) [0x7fcd8f072933]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #2 /usr/local/samba/lib/libsamba-util.so.0(log_stack_trace+0) [0x7fcd8f072b7f]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #3 /usr/local/samba/lib/private/libtalloc.so.2(+0x29ef) [0x7fcd8fd8b9ef]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #4 /usr/local/samba/lib/private/libtalloc.so.2(+0x2a15) [0x7fcd8fd8ba15]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #5 /usr/local/samba/lib/private/libtalloc.so.2(+0x2a93) [0x7fcd8fd8ba93]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #6 /usr/local/samba/lib/private/libtalloc.so.2(+0x475f) [0x7fcd8fd8d75f]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #7 /usr/local/samba/lib/private/libtalloc.so.2(talloc_check_name+0x33) [0x7fcd8fd8d7f9]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #8 /usr/local/samba/lib/ldb/partition.so(+0x52d3) [0x7fcd740442d3]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #9 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #10 /usr/local/samba/lib/ldb/show_deleted.so(+0x1312) [0x7fcd71740312]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #11 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #12 /usr/local/samba/lib/ldb/extended_dn_out.so(+0x3dec) [0x7fcd770efdec]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #13 /usr/local/samba/lib/ldb/extended_dn_out.so(+0x3e2c) [0x7fcd770efe2c]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #14 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #15 /usr/local/samba/lib/ldb/operational.so(+0x6b52) [0x7fcd7465fb52]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #16 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #17 /usr/local/samba/lib/ldb/encrypted_secrets.so(+0x3e30) [0x7fcd774fce30]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #18 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #19 /usr/local/samba/lib/ldb/rdn_name.so(+0x2ab1) [0x7fcd735c9ab1]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #20 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #21 /usr/local/samba/lib/ldb/aclread.so(+0x3ae6) [0x7fcd7873dae6]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #22 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #23 /usr/local/samba/lib/ldb/acl.so(+0x8875) [0x7fcd78948875]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #24 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #25 /usr/local/samba/lib/ldb/descriptor.so(+0x47a2) [0x7fcd77d1e7a2]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #26 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #27 /usr/local/samba/lib/ldb/extended_dn_in.so(+0x2e17) [0x7fcd772f5e17]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #28 /usr/local/samba/lib/ldb/extended_dn_in.so(+0x33d6) [0x7fcd772f63d6]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #29 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #30 /usr/local/samba/lib/ldb/asq.so(+0x1a6f) [0x7fcd78333a6f]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #31 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #32 /usr/local/samba/lib/ldb/server_sort.so(+0x19eb) [0x7fcd719439eb]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #33 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #34 /usr/local/samba/lib/ldb/anr.so(+0x1ae2) [0x7fcd78537ae2]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #35 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #36 /usr/local/samba/lib/ldb/ranged_results.so(+0x1a88) [0x7fcd737cda88]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #37 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #38 /usr/local/samba/lib/ldb/vlv.so(+0x2db5) [0x7fcd7031adb5]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #39 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #40 /usr/local/samba/lib/ldb/paged_results.so(+0x295c) [0x7fcd7445695c]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #41 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #42 /usr/local/samba/lib/ldb/dirsync.so(+0x4f59) [0x7fcd77b15f59]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #43 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #44 /usr/local/samba/lib/ldb/lazy_commit.so(+0xd43) [0x7fcd766d1d43]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #45 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #46 /usr/local/samba/lib/ldb/dsdb_notification.so(+0x1521) [0x7fcd77701521]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #47 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #48 /usr/local/samba/lib/ldb/rootdse.so(+0x6c39) [0x7fcd72f8dc39]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #49 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #50 /usr/local/samba/lib/ldb/resolve_oids.so(+0x1ffc) [0x7fcd7319cffc]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #51 /usr/local/samba/lib/private/libldb.so.2(ldb_next_request+0x14f) [0x7fcd8fb58c09]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #52 /usr/local/samba/lib/private/libldb.so.2(+0xb643) [0x7fcd8fb55643]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #53 /usr/local/samba/lib/private/libldb.so.2(ldb_request+0x161) [0x7fcd8fb557ba]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #54 /usr/local/samba/lib/ldb/asq.so(+0x1995) [0x7fcd78333995]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #55 /usr/local/samba/lib/ldb/asq.so(+0x13a4) [0x7fcd783333a4]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #56 /usr/local/samba/lib/private/libldb.so.2(ldb_module_done+0x1fc) [0x7fcd8fb5a101]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #57 /usr/local/samba/lib/private/libldb.so.2(+0xb343) [0x7fcd8fb55343]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #58 /usr/local/samba/lib/private/libldb.so.2(ldb_module_done+0x1fc) [0x7fcd8fb5a101]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #59 /usr/local/samba/lib/ldb/extended_dn_in.so(+0x1a3a) [0x7fcd772f4a3a]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #60 /usr/local/samba/lib/private/libldb.so.2(ldb_module_done+0x1fc) [0x7fcd8fb5a101]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #61 /usr/local/samba/lib/ldb/acl.so(+0x82cb) [0x7fcd789482cb]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #62 /usr/local/samba/lib/private/libldb.so.2(ldb_module_done+0x1fc) [0x7fcd8fb5a101]
>> 2020-01-14T17:20:13+02:00 dc04 samba[10286]:    #63 /usr/local/samba/lib/ldb/aclread.so(+0x3481) [0x7fcd7873d481]
>> 2020-01-14T17:20:13+02:00 dc04 samba[23314]: [2020/01/14 17:20:13.580079,  0] ../../source4/smbd/process_prefork.c:519(prefork_child_pipe_handler)
>> 2020-01-14T17:20:13+02:00 dc04 samba[23314]:   prefork_child_pipe_handler: Parent 23314, Child 10286 terminated with signal 6
>> 2020-01-14T17:20:13+02:00 dc04 samba[23314]: [2020/01/14 17:20:13.580406,  0] ../../source4/smbd/process_prefork.c:443(prefork_restart)
>> 2020-01-14T17:20:13+02:00 dc04 samba[23314]:   prefork_restart: Restarting [ldap] pre-fork worker in (120) seconds
>> 
>> Samba was built from git only with “./configure --with-sendfile-support” option.
>> Initially I was using bind9 for DNS but moved to internal samba DNS because I though it was an error generated by bind9 but the errors kept showing.
>> 
>> root at dc04:~# cat /usr/local/samba/etc/smb.conf
>> # Global parameters
>> [global]
>>        bind interfaces only = Yes
>>        interfaces = lo ens19
>>        netbios name = DC04
>>        realm = XXXX-XXX.LOCAL
>>        server role = active directory domain controller
>>        server services = s3fs, rpc, nbt, wrepl, ldap, cldap, kdc, drepl, winbindd, ntp_signd, kcc, dns
>>        workgroup = XXXX-XXX
>>        idmap_ldb:use rfc2307  = yes
>>        ldap server require strong auth = no
>>    dns forwarder = 10.253.50.5
>> 
>> [sysvol]
>>        path = /usr/local/samba/var/locks/sysvol
>>        read only = No
>> 
>> [netlogon]
>>        path = /usr/local/samba/var/locks/sysvol/xxxx-xxx.local/scripts
>>        read only = No
>> root at dc04:~#
>> 
>> 
>> root at dc04:~# cat /tmp/samba-debug-info.txt
>> Collected config  --- 2020-01-14-17:19 -----------
>> 
>> Hostname: dc04
>> DNS Domain: xxxx-xxx.local
>> FQDN: dc04.xxxx-xxx.local
>> ipaddress: 188.173.1.79 10.253.50.50
>> 
>> -----------
>> 
>> Kerberos SRV _kerberos._tcp.xxxx-xxx.local record verified ok, sample output:
>> Server:         10.253.50.50
>> Address:        10.253.50.50#53
>> 
>> _kerberos._tcp.xxxx-xxx.local   service = 0 100 88 dc04.xxxx-xxx.local.
>> _kerberos._tcp.xxxx-xxx.local   service = 0 100 88 dc03.xxxx-xxx.local.
>> _kerberos._tcp.xxxx-xxx.local   service = 0 100 88 dc05.xxxx-xxx.local.
>> Samba is running as an AD DC
>> 
>> -----------
>>       Checking file: /etc/os-release
>> 
>> NAME="Ubuntu"
>> VERSION="18.04.3 LTS (Bionic Beaver)"
>> ID=ubuntu
>> ID_LIKE=debian
>> PRETTY_NAME="Ubuntu 18.04.3 LTS"
>> VERSION_ID="18.04"
>> HOME_URL="https://www.ubuntu.com/"
>> SUPPORT_URL="https://help.ubuntu.com/"
>> BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
>> PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
>> VERSION_CODENAME=bionic
>> UBUNTU_CODENAME=bionic
>> 
>> -----------
>> 
>> 
>> This computer is running Ubuntu 18.04.3 LTS x86_64
>> 
>> -----------
>> running command : ip a
>> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
>>    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>>    inet 127.0.0.1/8 scope host lo
>> 2: ens18: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
>>    link/ether ba:f3:97:bb:b9:8a brd ff:ff:ff:ff:ff:ff
>>    inet xxx.xxx.xxx.xxx/25 brd 188.173.1.127 scope global ens18
>> 3: ens19: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
>>    link/ether ae:54:fe:ed:c9:07 brd ff:ff:ff:ff:ff:ff
>>    inet 10.253.50.50/25 brd 10.253.50.127 scope global ens19
>> 
>> -----------
>>       Checking file: /etc/hosts
>> 
>> 127.0.0.1 localhost
>> 10.253.50.50 dc04.xxxx-xxx.local dc04
>> 
>> # The following lines are desirable for IPv6 capable hosts
>> ::1     ip6-localhost ip6-loopback
>> fe00::0 ip6-localnet
>> ff00::0 ip6-mcastprefix
>> ff02::1 ip6-allnodes
>> ff02::2 ip6-allrouters
>> 
>> -----------
>> 
>>       Checking file: /etc/resolv.conf
>> 
>> nameserver 10.253.50.50
>> search xxxx-xxx.local
>> 
>> -----------
>> 
>>       Checking file: /etc/krb5.conf
>> 
>> [libdefaults]
>>    dns_lookup_realm = false
>>    dns_lookup_kdc = true
>>    default_realm = xxxx-xxx.LOCAL
>> 
>> -----------
>> 
>>       Checking file: /etc/nsswitch.conf
>> 
>> # /etc/nsswitch.conf
>> #
>> # Example configuration of GNU Name Service Switch functionality.
>> # If you have the `glibc-doc-reference' and `info' packages installed, try:
>> # `info libc "Name Service Switch"' for information about this file.
>> 
>> passwd:         compat systemd
>> group:          compat systemd
>> shadow:         compat
>> gshadow:        files
>> 
>> hosts:          files dns
>> networks:       files
>> 
>> protocols:      db files
>> services:       db files
>> ethers:         db files
>> rpc:            db files
>> 
>> netgroup:       nis
>> 
>> -----------
>> 
>>       Checking file: /usr/local/samba/etc/smb.conf
>> 
>> # Global parameters
>> [global]
>>        bind interfaces only = Yes
>>        interfaces = lo ens19
>>        netbios name = DC04
>>        realm = xxxx-xxx.LOCAL
>>        server role = active directory domain controller
>>        server services = s3fs, rpc, nbt, wrepl, ldap, cldap, kdc, drepl, winbindd, ntp_signd, kcc, dns
>>        workgroup = xxxx-xxx
>>        idmap_ldb:use rfc2307  = yes
>>        ldap server require strong auth = no
>>    dns forwarder = 10.253.50.5
>> 
>> [sysvol]
>>        path = /usr/local/samba/var/locks/sysvol
>>        read only = No
>> 
>> [netlogon]
>>        path = /usr/local/samba/var/locks/sysvol/xxxx-xxx.local/scripts
>>        read only = No
>> 
>> -----------
>> 
>> Detected bind DLZ enabled..
>>       Checking file: /etc/bind/named.conf
>> 
>> // This is the primary configuration file for the BIND DNS server named.
>> //
>> // Please read /usr/share/doc/bind9/README.Debian.gz for information on the
>> // structure of BIND configuration files in Debian, *BEFORE* you customize
>> // this configuration file.
>> //
>> // If you are just adding zones, please do that in /etc/bind/named.conf.local
>> 
>> include "/etc/bind/named.conf.options";
>> include "/etc/bind/named.conf.local";
>> include "/etc/bind/named.conf.default-zones";
>> include "/usr/local/samba/bind-dns/named.conf";
>> 
>> -----------
>> 
>>       Checking file: /etc/bind/named.conf.options
>> 
>> options {
>>        directory "/var/cache/bind";
>> 
>>        auth-nxdomain no;    # conform to RFC1035
>>        listen-on-v6 { none; };
>>        listen-on port 53 { 127.0.0.1; any; };
>>        tkey-gssapi-keytab "/usr/local/samba/private/dns.keytab";
>>        minimal-responses yes;
>> 
>>        allow-recursion { any; };
>>        allow-query { any; };
>> 
>>        dnssec-enable yes;
>>        dnssec-validation yes;
>> 
>>        forward only;
>>        forwarders {
>>                10.253.50.5;
>>        };
>> };
>> 
>> -----------
>> 
>>       Checking file: /etc/bind/named.conf.local
>> 
>> //
>> // Do any local configuration here
>> //
>> 
>> // Consider adding the 1918 zones here, if they are not used in your
>> // organization
>> //include "/etc/bind/zones.rfc1918";
>> 
>> -----------
>> 
>>       Checking file: /etc/bind/named.conf.default-zones
>> 
>> // prime the server with knowledge of the root servers
>> zone "." {
>>        type hint;
>>        file "/etc/bind/db.root";
>> };
>> 
>> // be authoritative for the localhost forward and reverse zones, and for
>> // broadcast zones as per RFC 1912
>> 
>> zone "localhost" {
>>        type master;
>>        file "/etc/bind/db.local";
>> };
>> 
>> zone "127.in-addr.arpa" {
>>        type master;
>>        file "/etc/bind/db.127";
>> };
>> 
>> zone "0.in-addr.arpa" {
>>        type master;
>>        file "/etc/bind/db.0";
>> };
>> 
>> zone "255.in-addr.arpa" {
>>        type master;
>>        file "/etc/bind/db.255";
>> };
>> 
>> -----------
>> 
>> Samba DNS zone list:   2 zone(s) found
>> 
>>  pszZoneName                 : xxxx-xxx.local
>>  Flags                       : DNS_RPC_ZONE_DSINTEGRATED DNS_RPC_ZONE_UPDATE_SECURE
>>  ZoneType                    : DNS_ZONE_TYPE_PRIMARY
>>  Version                     : 50
>>  dwDpFlags                   : DNS_DP_AUTOCREATED DNS_DP_DOMAIN_DEFAULT DNS_DP_ENLISTED
>>  pszDpFqdn                   : DomainDnsZones.xxxx-xxx.local
>> 
>>  pszZoneName                 : _msdcs.xxxx-xxx.local
>>  Flags                       : DNS_RPC_ZONE_DSINTEGRATED DNS_RPC_ZONE_UPDATE_SECURE
>>  ZoneType                    : DNS_ZONE_TYPE_PRIMARY
>>  Version                     : 50
>>  dwDpFlags                   : DNS_DP_AUTOCREATED DNS_DP_FOREST_DEFAULT DNS_DP_ENLISTED
>>  pszDpFqdn                   : ForestDnsZones.xxxx-xxx.local
>> 
>> Samba DNS zone list Automated check :
>> zone : xxxx-xxx.local ok, no Bind flat-files found
>> -----------
>> zone : _msdcs.xxxx-xxx.local ok, no Bind flat-files found
>> -----------
>> 
>> Installed packages:
>> ii  acl                                   2.2.52-3build1                                  amd64        Access control list utilities
>> ii  attr                                  1:2.4.47-2build1                                amd64        Utilities for manipulating filesystem extended attributes
>> ii  bind9                                 1:9.11.3+dfsg-1ubuntu1.11                       amd64        Internet Domain Name Server
>> ii  bind9-host                            1:9.11.3+dfsg-1ubuntu1.11                       amd64        DNS lookup utility (deprecated)
>> ii  bind9utils                            1:9.11.3+dfsg-1ubuntu1.11                       amd64        Utilities for BIND
>> ii  krb5-config                           2.6                                             all          Configuration files for Kerberos Version 5
>> ii  krb5-locales                          1.16-2ubuntu0.1                                 all          internationalization support for MIT Kerberos
>> ii  krb5-user                             1.16-2ubuntu0.1                                 amd64        basic programs to authenticate using MIT Kerberos
>> ii  libacl1:amd64                         2.2.52-3build1                                  amd64        Access control list shared library
>> ii  libacl1-dev                           2.2.52-3build1                                  amd64        Access control list static libraries and headers
>> ii  libattr1:amd64                        1:2.4.47-2build1                                amd64        Extended attribute shared library
>> ii  libattr1-dev:amd64                    1:2.4.47-2build1                                amd64        Extended attribute static libraries and headers
>> ii  libbind9-160:amd64                    1:9.11.3+dfsg-1ubuntu1.11                       amd64        BIND9 Shared Library used by BIND
>> ii  libgssapi-krb5-2:amd64                1.16-2ubuntu0.1                                 amd64        MIT Kerberos runtime libraries - krb5 GSS-API Mechanism
>> ii  libkrb5-26-heimdal:amd64              7.5.0+dfsg-1                                    amd64        Heimdal Kerberos - libraries
>> ii  libkrb5-3:amd64                       1.16-2ubuntu0.1                                 amd64        MIT Kerberos runtime libraries
>> ii  libkrb5support0:amd64                 1.16-2ubuntu0.1                                 amd64        MIT Kerberos runtime libraries - Support library
>> ii  python3-attr                          17.4.0-2                                        all          Attributes without boilerplate (Python 3)
>> 
>> -----------
>> 
>> 
>> 
>> 
> I have a feeling that you didn't have the most uptodate packages installed when you compiled Samba, can I suggest you use this repo: http://apt.van-belle.nl/ instead of compiling Samba yourself.
> 
> Rowland
> 
> 
> 
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