Fwd: crippling bug in jwhois

[jonasob]

---------- Forwarded message ----------
From: Jonas Öberg
Date: 8 January 2015 at 09:18
Subject: Fwd: crippling bug in jwhois #jwhois-bug
To: trigger@recipie.ifttt.com

---------- Forwarded message ----------
From: Eesger Toering (Knooppunt)
Date: 24 February 2014 at 14:59
Subject: crippling bug in jwhois
To: bug-jwhois@gnu.org

Hello,

I made an error in a piece of software I wrote. Each hanging process
demands 100% CPU power. I was testing a bit and a dozen process were
fighting for resources, resulted in crippled server!

-------------------------- ps axuw USER
-------------------------------- rs=0 12:52
Duur(m) PID PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
31 14528 14528 27.8 0.0 8628 1012 ? R 12:21 8:44
/usr/bin/whois -h 1 knoop.nl
31 14672 14672 27.2 0.0 8628 1012 ? R 12:21 8:26
/usr/bin/whois -h 1 knoop.nl
30 15106 15106 25.2 0.0 8628 1016 ? R 12:22 7:38
/usr/bin/whois -h 1 knoop.nl
29 15289 15289 24.4 0.0 8628 1012 ? R 12:23 7:18
/usr/bin/whois -h 1 knoop.nl
29 15694 15694 23.6 0.0 8628 1012 ? R 12:23 6:52
/usr/bin/whois -h 1 knoop.nl
28 15844 15844 23.0 0.0 8628 1016 ? R 12:24 6:37
/usr/bin/whois -h 1 knoop.nl
28 16187 16187 22.8 0.0 8628 1012 ? R 12:24 6:26
/usr/bin/whois -h 1 knoop.nl
27 16524 16524 22.4 0.0 8628 1012 ? R 12:25 6:14
/usr/bin/whois -h 1 knoop.nl
25 17571 17571 21.8 0.0 8628 1012 ? R 12:27 5:38
/usr/bin/whois -h 1 knoop.nl
25 17642 17642 21.6 0.0 8628 1016 ? R 12:27 5:32
/usr/bin/whois -h 1 knoop.nl
25 17730 17730 21.8 0.0 8628 1016 ? R 12:27 5:33
/usr/bin/whois -h 1 knoop.nl
25 17804 17804 21.7 0.0 8628 1012 ? R 12:27 5:28
/usr/bin/whois -h 1 knoop.nl

I accidentally placed a '1' for the forced server option (-h). When a
server is given that can not respond error handling is done properly.

I could reproduce it via the command line:

_[root@s01.knoop.nl ~]# whois -h 1 *_querydomain.nl
*
[Querying 1]
^C

•       ( => needed to manually abort!!) *_[root@s01.knoop.nl
  

  ~]# whois -h a.nl *_querydomain.nl
  *
  [Querying a.nl]
  [a.nl: Name or service not known]
  [Unable to connect to remote host]
  *[root@s01.knoop.nl ~]# whois -h knoop.nl
  querydomain.nl *
  [Querying knoop.nl]
  [Unable to connect to remote host]
  *[root@s01.knoop.nl ~]# whois querydomain.nl
  *
  [Querying whois.domain-registry.nl]
  [whois.domain-registry.nl]
  querydomain.nl is free

*[root@s01.knoop.nl ~]# whois *jwhois version 4.0,
Copyright (C) 1999-2007 Free Software Foundation, Inc.
This program is free software with ABSOLUTELY NO WARRANTY; you may
redistribute it under the terms of the GNU General Public License.

Usage: jwhois [OPTIONS] [QUERY]
--version display version number and patch level
--help display this help
-v, --verbose verbose debug output
-c FILE, --config=FILE use FILE as configuration file
-h HOST, --host=HOST explicitly query HOST
-n, --no-redirect disable content redirection
-s, --no-whoisservers disable whois-servers.net service support
-a, --raw disable reformatting of the query
-i, --display-redirections display all redirects instead of hiding them
-p PORT, --port=PORT use port number PORT (in conjunction with HOST)
-r, --rwhois force an rwhois query to be made
--rwhois-display=DISPLAY sets the display option in rwhois queries
--rwhois-limit=LIMIT sets the maximum number of matches to return

Report bugs to bug-jwhois@gnu.org
[root@s01.knoop.nl ~]#

If you need further assitance/information, please contact me.



via Email http://ift.tt/14sBgXq

January 08, 2015 at 09:21AM