cfservd coredumps

[Martin A. Brooks]

Hi

I've found away of reliably making cfservd coredump.

I have two hosts, let's call them master and slave. I use master to push 
out a current hosts file to slave, so I have a file that looks like this

1.2.3.4 master
1.2.3.5 slave

I change the IP of slave to 1.2.3.6  AND I change the hosts file on master 
to reflect the change, fully expecting cfengine to push out the new 
configuration. The result is cfservd coredumping.  I'm sorry I have to 
anonymise the error, but please assume that xxxxx is the slave and yyyyy is 
the master.

----------------------------------
New connection...(from ::ffff:10.4.16.63)
Spawning new thread...
Checking file updates on /var/cfengine/inputs/cfservd.conf (3d490559/3d613025)
RecvSocketStream(8)
    (Concatenated 8 from stream)
Transaction Receive [t 54][]
RecvSocketStream(54)
    (Concatenated 54 from stream)
Received: [CAUTH 10.4.16.63 xxxxx root 0] on socket 7
Connecting host identifies itself as 10.4.16.63 xxxxx root 0
(ipstring=[10.4.16.63],fqname=[xxxxx],username=[root],socket=[::ffff:10.4.16.63])
FuzzyItemIn(10.4.16.63)
Socket caller address appears honest (10.4.16.63 matches 10.4.16.63)
yyyyy: Socket originates from 10.4.16.63=xxxxx
Attempting to look up hostname (xxxxx)
yyyyy: Unable to lookup xxxxx
yyyyy: getaddrinfo: Undefined error: 0
Segmentation fault (core dumped)
----------------------------------------

To fix this, I need to remove the stale entry from the slave's host file, 
restart cfservd then run cfagent on the client (or wait from the cron job. 
The hosts file then replicates as normal.

Regards

Martin A. Brooks
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