bin/123065: inetd takes 100% cpu
volker at vwsoft.com
Mon Apr 28 22:10:04 UTC 2008
The following reply was made to PR bin/123065; it has been noted by GNATS.
From: Volker <volker at vwsoft.com>
To: bug-followup at FreeBSD.org, thogard at abnormal.com
Subject: Re: bin/123065: inetd takes 100% cpu
Date: Tue, 29 Apr 2008 00:05:12 +0200
while your idea might look nice in the first place, I see a lot problems
with that solution. I think you're already aware of the security risks
of your hack.
Your config instructs inetd to set verbose debugging mode, bind to a
specific IP address and write it's pidfile to /tmp. It is not guaranteed
(and by default not the case) to have 1) syslogd running in single user
mode and 2) the network interfaces are up.
Also inetd lives in /usr/sbin, needs libs from /usr/lib, telnetd lives
in /usr/libexec and also needs libs from /usr/lib. In single user mode
the only filesystem mounted will be the root-fs and it's mounted
read-only. syslogd logs by default to /var/log.
Please make sure, filesystems root-fs, /usr, /var and /tmp are mounted
and /tmp and /var are writable, syslogd is started. If you can make sure
all these conditions are met, please check if you can reproduce this. If
the problem persists, we need ktrace debug output.
Also when logging in and out, login(1) tries to write wtmp which may
also fail with r/o mounts.
Please keep in mind, your solution should not be used in the public network.
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