Description: Starting dnsmasq with --host-record option will hang it at once, making CPU Usage 100%. Using --test to check conf file with host-record lines hangs as well. Remove /etc/dnsmasq.conf and start it in debug mode with --host-record still hangs. I am not sure whether this is a upstream bug. I will report to upstream if anyone could tell me.


Additional info:
* package version(s)
2.63rc6
* config and/or log files etc.
Even with --no-daemon option, this bug will make dnsmasq output nothing (and CPU Usage 100%). So nothing could be recorded.


Steps to reproduce:
1. Remove or rename /etc/dnsmasq.conf to make sure every other options are in default. (Omitting this step get the same result)
2. Killall dnsmasq and remove /run/dnsmasq.pid if exists. This step can be omitted as well.
3. According to dnsmasq's man page, run dnsmasq with --host-record=laptop,laptop.thekelleys.org,192.168.0.1,1234::100 option. (Running with --host-record=foo,192.168.0.1 gets the same results. You can add --no-daemon if you like.)
4. Dnsmasq hangs at once, outputs nothing, and CPU usage is 100% now.
5. If you like, you can write host-record line in a conf file and dnsmasq --test it. It will hang as well.