Bug 39076 – DNS-Sub-Domain mit forwarder Konfiguration in /etc/bind/local.conf.samba4

Bug 39076 - DNS-Sub-Domain mit forwarder Konfiguration in /etc/bind/local.conf.samba4


Summary:	DNS-Sub-Domain mit forwarder Konfiguration in /etc/bind/local.conf.samba4

Status:	RESOLVED WORKSFORME

Product:	UCS
Classification:	Unclassified
Component:	DNS
Version:	UCS 4.0
Hardware:	Other Linux

Importance:	P1 normal (vote)
Target Milestone:	UCS 4.0-x
Assigned To:	UCS maintainers
QA Contact:

URL:
Keywords:

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2015-08-04 15:03 CEST by rolandb
Modified:	2018-04-13 13:32 CEST (History)
CC List:	4 users (show)

See Also:
What kind of report is it?:	Bug Report
What type of bug is this?:	7: Crash: Bug causes crash or data loss
Who will be affected by this bug?:	1: Will affect a very few installed domains
How will those affected feel about the bug?:	3: A User would likely not purchase the product
User Pain:	0.120
Enterprise Customer affected?:
School Customer affected?:
ISV affected?:
Waiting Support:
Flags outvoted (downgraded) after PO Review:
Ticket number:
Bug group (optional):
Max CVSS v3 score:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.

Description rolandb 2015-08-04 15:03:59 CEST

Hallo zusammen

UCS 4.0-2 errata264 eine Subdomain Forwarding gemäss Artikel: http://wiki.univention.de/index.php?title=Cool_Solution_-_DNS-Forwarding_and_subdomains 

oder 

https://forge.univention.org/bugzilla/show_bug.cgi?id=34601

Unser Eintrag in /etc/bind/local.conf.samba4:

zone "corp.schule1.kunden.ch" {
      type slave;
      masters { 172.20.20.21; };
      forwarders {};
};

Der Fehler ist ganz einfach reproduzierbar:
<code>
dig fileserver01.corp.schule1.kunden.ch @univention-server.schule1.kunden.ch
</code>


#==> syslog <==
Aug  4 14:56:28 sr-kunde-01 kernel: [344026.315524] named[16697]: segfault at 0 ip 00007f786527ecca sp 00007f7866f4fe70 error 6 in dlz_bind9.so[7f786527c000+9000]


Grüsse, Roland

Comment 1 Arvid Requate

2015-08-12 23:25:17 CEST

Thanks for reporting, this should be fixed with the upcoming errata update for Bug 39139.

*** This bug has been marked as a duplicate of bug 39139 ***

Comment 2 Stefan Gohmann

2015-08-27 12:20:22 CEST

(In reply to Arvid Requate from comment #1)
> Thanks for reporting, this should be fixed with the upcoming errata update
> for Bug 39139.

I'm still able to reproduce it with the new version:

root@master401:~# dpkg -l samba-libs | grep ^ii
ii  samba-libs:amd64                                    2:4.2.3-1.788.201508261727                   amd64        Samba core libraries
root@master401:~# tail -f /var/log/syslog | grep segfault &
[1] 32199
root@master401:~# cat /etc/bind/local.conf.samba4
# add local zones here

zone "sub.deadlock40.intranet" {
      type slave;
      masters { 192.168.0.3; };
      forwarders {};
};
root@master401:~# dig foo.sub.$(dnsdomainname) @$(hostname -f)
May 22 07:44:19 unassigned-hostname kernel: [20944.790570] named[32063]: segfault at 0 ip 00007fb03bd08cca sp 00007fb03d790e70 error 6 in dlz_bind9.so[7fb03bd06000+9000]

Comment 3 Arvid Requate

2015-10-28 20:36:16 CET

Can't reproduce it in UCS 4.0-3 errata 342. In case somebody has a core dump or full gdb backtrace wich samba-dbg installed, that might help.

Comment 4 Stefan Gohmann

2015-11-03 15:21:05 CET

(In reply to Arvid Requate from comment #3)
> Can't reproduce it in UCS 4.0-3 errata 342. In case somebody has a core dump
> or full gdb backtrace wich samba-dbg installed, that might help.

Hm, I tried it again and now I'm also unable to reproduce it. Strange.

Comment 5 Stefan Gohmann

2015-11-10 14:15:38 CET

Roland, can you provide a core dump on a system with at least 4.0-3 errata342?

Comment 6 Stefan Gohmann

2015-11-17 12:35:43 CET

Waiting

Comment 7 Philipp Hahn

2017-04-07 12:51:32 CEST

UCS-4.0 is OOM.
Did not occur again for >1Y.