bin/42430: mdnsd hangs on read_msg: ERROR failed to get errsd via SCM_RIGHTS

[roy%NetBSD.org@localhost]

>Number:         42430
>Category:       bin
>Synopsis:       mdnsd hangs on read_msg: ERROR failed to get errsd via 
>SCM_RIGHTS
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Dec 08 19:35:01 +0000 2009
>Originator:     Roy Marples
>Release:        
>Organization:
>Environment:
NetBSD uberpc.marples.name 5.99.22 NetBSD 5.99.22 (GENERIC) #4: Wed Dec  2 
08:18:40 GMT 2009  
roy%uberpc.marples.name@localhost:/usr/obj/sys/arch/amd64/compile/GENERIC amd64
>Description:
uberpc$ dns-sd -A
Registering Service Test._testupdate._tcp.local.
19:27:14.744  Got a reply for service Test._testupdate._tcp.local.: Name now 
registered and active
<big pause>
Adding Test HINFO record
<hang>

CTRL-C

uberpc$ tail /var/log/messages
Dec  8 19:24:39 uberpc mdnsd:  13: Removing FD
Dec  8 19:25:00 uberpc mdnsd:  13: Adding FD for uid 0
Dec  8 19:25:00 uberpc mdnsd:  13: DNSServiceRegister("Test", 
"_testupdate._tcp.", "", "", 4660) START
Dec  8 19:25:00 uberpc mdnsd:  13: 
DNSServiceRegister(Test._testupdate._tcp.local., 4660) ADDED
Dec  8 19:25:01 uberpc mdnsd:  13: 
DNSServiceRegister(Test._testupdate._tcp.local., 4660) REGISTERED
Dec  8 19:25:01 uberpc mdnsd: RR Cache now using 30 objects
Dec  8 19:25:06 uberpc mdnsd:  13: read_msg: ERROR failed to get errsd via 
SCM_RIGHTS
Dec  8 19:25:06 uberpc mdnsd:  13: 
DNSServiceRegister(Test._testupdate._tcp.local., 4660) STOP
Dec  8 19:25:06 uberpc mdnsd:  13: Removing FD
Dec  8 19:25:06 uberpc mdnsd: -99: 
DNSServiceRegister(Test._testupdate._tcp.local., 4660) DEREGISTERED
>How-To-Repeat:

>Fix: