[Bug 603363] [NEW] sshd never stops, prevents umount of /usr partition

[Rob Donovan]

Public bug reported:

Under Ubuntu 10.04 Lucid, sshd is an upstart job controlled by
/etc/init/ssh.conf  This file provides for start and stop as follows:

start on filesystem
stop on runlevel S

At shutdown or reboot, therefore, sshd is not stopped.

Since sshd is in /usr/sbin/sshd and also accesses lib files in /usr/lib
this means that

/etc/rc0.d/S40umountfs

cannot successfully umount /usr at shutdown when /usr is on its own
partition.

This definitely leads to umount reporting errors in the shutdown console
messages.

It may also lead to fsck running on reboot and problems with mountall...
I can't say for certain yet as I am also having problems umounting /var,
possibly due to a power failure, which is what led me to notice and
investigate these messages.

My guess is that when sshd was a System V init process, it was killed by
the killall5 process in /etc/rc0.d/S20sendsigs.  Under Lucid sshd has
been made an upstart job and as such is exempt from the killall5 and so
needs to be stopped explicitly.

I admit I am by no means an expert on upstart or sshd, but the fix
appears to me to be to modify /etc/init/ssh.conf to read

stop on runlevel [!2345]

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: openssh-server 1:5.3p1-3ubuntu4
ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic x86_64
Architecture: amd64
Date: Thu Jul  8 14:45:50 2010
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427.1)
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: openssh

** Affects: openssh (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug lucid

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sshd never stops, prevents umount of /usr partition
https://bugs.launchpad.net/bugs/603363
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