[Pdns-users] PowerDNS 2.9.16/Fedora Core 1 crashes on nmap service-scan

[Bas Verhoeven]

Hi,

I don't know if this is the correct list, but i'm having problems with
PowerDNS, it's crashing when I run nmap on the IP running PowerDNS.

OS: Fedora Core 1
Source: PowerDNS RPM
Version: 2.9.16

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[root at sd8 powerdns]# service pdns monitor
Jun 25 17:18:20 This is a standalone pdns
Jun 25 17:18:20 UDP server bound to 193.22.139.XXX:53
Jun 25 17:18:20 TCP server bound to 193.22.139.XXX:53
Jun 25 17:18:20 PowerDNS 2.9.16 (C) 2001-2004 PowerDNS.COM BV (Feb 28 2004,
21:34:36) starting up
Jun 25 17:18:20 PowerDNS comes with ABSOLUTELY NO WARRANTY. This is free
software, and you are welcome to redistribute it according to the terms of
the GPL version 2.
% Jun 25 17:18:20 Launched webserver on 193.22.139.XXX:8081
Jun 25 17:18:20 Master/slave communicator launching
Jun 25 17:18:20 gmysql Connection succesful
Jun 25 17:18:20 All slave domains are fresh
Jun 25 17:18:20 No master domains need notifications
Jun 25 17:18:20 Creating backend connection for TCP
Jun 25 17:18:20 gmysql Connection succesful
Jun 25 17:18:20 About to create 3 backend threads
Jun 25 17:18:20 gmysql Connection succesful
Jun 25 17:18:20 gmysql Connection succesful
Jun 25 17:18:20 gmysql Connection succesful
Jun 25 17:18:20 Done launching threads, ready to distribute questions

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Running nmap:

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[root at paradise tmp]# nmap -vv -sV tempns

Starting nmap 3.50 ( http://www.insecure.org/nmap/ ) at 2004-06-25 17:18
CEST
Host tempns (193.22.139.XXX) appears to be up ... good.
Initiating SYN Stealth Scan against tempns (193.22.139.XXX) at 17:18
Adding open port 8081/tcp
Adding open port 53/tcp
The SYN Stealth Scan took 1 second to scan 1659 ports.
Initiating service scan against 2 services on 1 host at 17:18

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And after a few seconds the following occurs on the PowerDNS server:

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Jun 25 17:18:42 Timeout in webserver
Jun 25 17:18:42 Got a signal 11, attempting to print trace:
Jun 25 17:18:42 [0x80bb576]
Jun 25 17:18:42 [0x82449aa]
Jun 25 17:18:42 [0x824d0d8]
Jun 25 17:18:42 [0x80af334]
Jun 25 17:18:42 [0x82404ae]
Jun 25 17:18:43 [0x828844a]
/etc/init.d/pdns: line 175:  7778 Aborted









       $pdns_server --daemon=no --guardian=no --control-console --loglevel=9

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Disabling the webserver seems to solve the situation.

Sincerely yours,
Bas Verhoeven