Public bug reported:
Description: Ubuntu 15.10
Release: 15.10
Package Info:
==========
socat:
Installed: 1.7.3.0-1
Candidate: 1.7.3.0-1
Version table:
*** 1.7.3.0-1 0
500 http://gr.archive.ubuntu.com/ubuntu/ wily/universe i386 Packages
100 /var/lib/dpkg/status
[Impact]
At Ubuntu Wily OS, when we use the socat with a nameserver which is not defined
at /etc/hosts and is unknown, the system hits 100% cpu usage. Additional, to
terminate the process you must give -9 parameter in kill command. Ctrl+C does
not terminate the process.
With older versions of socat (< 1.7.3.0 upstream) the system does not
drive up to 100% cpu usage, but prints appropriate error message.
[Test case]
* A simple test to validate the issue, is to execute the below command:
socat tcp:server-local:789 -
* Using older version of socat the above command will print:
socat[2756] E getaddrinfo("server-local", "(null)", {1,0,1,6}, {}): Name or
service not known
[Regression Potential]
This bug affects the releases that use socat 1.7.3.0 upstream version (Wily,
Xenial). The Vivid, Trusty and Precise are not affected.
** Affects: socat (Ubuntu)
Importance: Undecided
Status: New
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Server Team, which is subscribed to socat in Ubuntu.
https://bugs.launchpad.net/bugs/1511118
Title:
100% cpu usage with unresolved name server
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