[Dnsmasq-discuss] dnsmasq does crash with segmentation fault

Simon Kelley simon at thekelleys.org.uk
Sun Jan 20 17:02:43 GMT 2013


On 20/01/13 15:02, e9hack wrote:
> Hi,
>
> my windows 7 PC is connected with a WLAN card to my router. If my PC is connected to one
> router, which doesn't run dnsmasq, it got an ipv4 address only. It's 192.168.26.100. If I
> disconnect the PC from this router an let it connect to the router with dnsmasq, it got
> the address 192.168.25.2. It got the ipv4 gateway and dns address and dnsmasq dies with a
> segmentation fault:
>
> root at WLAN-DSL5:~ #dnsmasq --no-daemon -C /etc/dnsmasq.conf
> dnsmasq: started, version v2.66test11 cachesize 200
> dnsmasq: compile time options: IPv6 GNU-getopt no-DBus no-i18n no-IDN DHCP DHCPv6
> no-scripts no-TFTP no-conntrack no-auth
> dnsmasq-dhcp: DHCP, IP range 192.168.25.100 -- 192.168.25.150, lease time 2d
> dnsmasq-dhcp: DHCPv6, IP range fec0::ffff:0:0:ffff:100 -- fec0::ffff:0:0:ffff:ffff, lease
> time 2d
> dnsmasq: using local addresses only for domain lan
> dnsmasq: reading /etc/resolv.conf
> dnsmasq: using nameserver ...
> dnsmasq: using nameserver ...
> dnsmasq: using nameserver ...
> dnsmasq: using nameserver ...
> dnsmasq: using local addresses only for domain lan
> dnsmasq: read /var/hosts - 24 addresses
> dnsmasq-dhcp: duplicate IP address ... in dhcp-config directive
> dnsmasq-dhcp: duplicate IP address ... in dhcp-config directive
> dnsmasq-dhcp: duplicate IP address ... in dhcp-config directive
> dnsmasq-dhcp: duplicate IP address ... in dhcp-config directive
> dnsmasq-dhcp: duplicate IP address ... in dhcp-config directive
> dnsmasq-dhcp: 14128106 available DHCP range: fec0::ffff:0:0:ffff:100 --
> fec0::ffff:0:0:ffff:ffff
> dnsmasq-dhcp: 14128106 vendor class: 311
> dnsmasq-dhcp: 14128106 DHCPINFORMATION-REQUEST(br0)
> 00:01:00:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx windows7-pc
> dnsmasq-dhcp: 14128106 requested options: 24:domain-search, 23:dns-server, 17:vendor-opts,
> dnsmasq-dhcp: 14128106 requested options: 32:information-refresh-time
> Segmentation fault
> root at WLAN-DSL5:~ #
>
> Regards,
> Hartmut


By far the easiest way to solve this is to get a core-dump or debugger 
output?

What system are you running dnsmasq on? does it have gdb available?


Cheers,

Simon.



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