dig segment fault
Adam Tkac
atkac at redhat.com
Mon Feb 18 14:05:25 UTC 2008
On Mon, Feb 18, 2008 at 08:44:10AM -0500, Tom Greaser wrote:
> We have Redhat ES 5.1 running BIND 9.3.3rc2
> I can do 99.98% of all lookups of remote sites
> Im having issues with just two sites that it just can not resolve.
> I get a Segmentation fault at the end when i should be giving me
> back the A record info im requesting.
> dig reymem.com +trace
> . 376331 IN NS k.root-servers.net.
> . 376331 IN NS l.root-servers.net.
> . 376331 IN NS m.root-servers.net.
> . 376331 IN NS a.root-servers.net.
> . 376331 IN NS b.root-servers.net.
> . 376331 IN NS c.root-servers.net.
> . 376331 IN NS d.root-servers.net.
> . 376331 IN NS e.root-servers.net.
> . 376331 IN NS f.root-servers.net.
> . 376331 IN NS g.root-servers.net.
> . 376331 IN NS h.root-servers.net.
> . 376331 IN NS i.root-servers.net.
> . 376331 IN NS j.root-servers.net.
> ;; Received 488 bytes from 157.182.94.70#53(157.182.94.70) in 0 ms
>
> com. 172800 IN NS a.gtld-servers.net.
> com. 172800 IN NS b.gtld-servers.net.
> com. 172800 IN NS c.gtld-servers.net.
> com. 172800 IN NS d.gtld-servers.net.
> com. 172800 IN NS e.gtld-servers.net.
> com. 172800 IN NS f.gtld-servers.net.
> com. 172800 IN NS g.gtld-servers.net.
> com. 172800 IN NS h.gtld-servers.net.
> com. 172800 IN NS i.gtld-servers.net.
> com. 172800 IN NS j.gtld-servers.net.
> com. 172800 IN NS k.gtld-servers.net.
> com. 172800 IN NS l.gtld-servers.net.
> com. 172800 IN NS m.gtld-servers.net.
> ;; Received 488 bytes from 193.0.14.129#53(k.root-servers.net) in 94 ms
>
> reymem.com. 172800 IN NS dns1.carebridge.net.
> reymem.com. 172800 IN NS dns2.carebridge.net.
> ;; Received 112 bytes from 192.5.6.30#53(a.gtld-servers.net) in 37 ms
>
> Segmentation fault
>
> Why seg fault ? How can i tell what caused the seg fault ? I have
> logging
> turned up on our named process and i dont see any errors
> severity debug 3;
>
> I seen dsn1 and 2 are .carebridge.net NS servers. So i did a dig
> to it and got NO Seg Fault.!!
>
> dig dns1.carebridge.net +trace
>
> ; <<>> DiG 9.3.3rc2 <<>> dns1.carebridge.net +trace
> ;; global options: printcmd
> . 375958 IN NS c.root-servers.net.
> . 375958 IN NS d.root-servers.net.
> . 375958 IN NS e.root-servers.net.
> . 375958 IN NS f.root-servers.net.
> . 375958 IN NS g.root-servers.net.
> . 375958 IN NS h.root-servers.net.
> . 375958 IN NS i.root-servers.net.
> . 375958 IN NS j.root-servers.net.
> . 375958 IN NS k.root-servers.net.
> . 375958 IN NS l.root-servers.net.
> . 375958 IN NS m.root-servers.net.
> . 375958 IN NS a.root-servers.net.
> . 375958 IN NS b.root-servers.net.
> ;; Received 488 bytes from 157.182.94.70#53(157.182.94.70) in 0 ms
>
> net. 172800 IN NS J.GTLD-SERVERS.net.
> net. 172800 IN NS G.GTLD-SERVERS.net.
> net. 172800 IN NS E.GTLD-SERVERS.net.
> net. 172800 IN NS M.GTLD-SERVERS.net.
> net. 172800 IN NS L.GTLD-SERVERS.net.
> net. 172800 IN NS F.GTLD-SERVERS.net.
> net. 172800 IN NS B.GTLD-SERVERS.net.
> net. 172800 IN NS I.GTLD-SERVERS.net.
> net. 172800 IN NS A.GTLD-SERVERS.net.
> net. 172800 IN NS K.GTLD-SERVERS.net.
> net. 172800 IN NS D.GTLD-SERVERS.net.
> net. 172800 IN NS H.GTLD-SERVERS.net.
> net. 172800 IN NS C.GTLD-SERVERS.net.
> ;; Received 506 bytes from 192.33.4.12#53(c.root-servers.net) in 29 ms
>
> dns1.carebridge.net. 172800 IN A 139.177.224.79
> carebridge.net. 172800 IN NS dns1.carebridge.net.
> carebridge.net. 172800 IN NS dns2.carebridge.net.
> ;; Received 118 bytes from 192.48.79.30#53(J.GTLD-SERVERS.net) in 214
> ms
>
>
> The other domain other domain i have issues with is smokefreemonc.org
> Anyone know what the next step in looking into these WEIRD issues are ?
> I've even brought up a named box outside our firewall to test and no
> luck. get the same thing
>
I believe this problem is bug in dig utility
2091. [port] dighost.c: race condition on cleanup. [RT #16417]
Fix is part of bind-9.3.4-P1 which is scheduled as update for RHEL
5.2. You will try proposed update if you want (el5 srpm is located on
http://people.redhat.com/atkac/bind/). You will also add yourself to
https://bugzilla.redhat.com/show_bug.cgi?id=423741 which is about this
issue.
Adam
--
Adam Tkac, Red Hat, Inc.
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