xenial: Watch out for boot failures due to /etc/mtab file

[Martin Pitt]

Dale Trombley [2015-10-29 10:30 -0400]:
> Should we wait a couple days to do our next update or is this just for new
> installs of xenial?

Existing installs should be fine, this is exclusively to find
installer bugs, i. e. broken /etc/mtab *before* the first boot of
installed Ubuntu (as we fix /etc/mtab on each boot).

It could of course be that something changes /etc/mtab back from a
symlink to a file while Ubuntu runs, then the next reboot would do
this as well. We had one really funny/scary bug in the past:
http://launchpadlibrarian.net/197406177/lxcfs_0.5-0ubuntu1_0.5-0ubuntu2.diff.gz

So if you find something like this during upgrades, please do tell me.
However, I haven't found or heard of anything so far, and boo-boos
like the above are hopefully rare.

Thanks,

Martin
-- 
Martin Pitt                        | http://www.piware.de
Ubuntu Developer (www.ubuntu.com)  | Debian Developer  (www.debian.org)