Re: Upgrading buster => bullseye. Canonicalization of /var/log/journal.

[Greg Wooledge <greg@wooledge.org>]

On Tue, Sep 28, 2021 at 08:55:59AM -0700, peter@easthope.ca wrote:
> Hi,
> Here the upgrade was completed except for the problem indicated in the 
> following transcript.
> 
> This page appears relevant.
> https://manpages.debian.org/stretch/systemd/systemd-journald.service.8.en.html
> 
> /var/log/journal exists here.

What does it look like?

ls -ld / /var /var/log /var/log/journal

> The command "systemd-tmpfiles --create --prefix /var/log/journal" gives 
> complaints similar to those in the transcript.
> 
> Likely the solution is obvious once the problem is understood. What is 
> unsafe about the path transition?  How is systemd journaling meant to 
> work?

> Setting up systemd (247.3-6) ...
> Detected unsafe path transition / -> /var during canonicalization of /var/log/journal.
> Detected unsafe path transition / -> /var during canonicalization of /var/log/journal.
> Detected unsafe path transition / -> /var during canonicalization of /var/log/journal.
> Detected unsafe path transition / -> /var during canonicalization of /var/log/journal/82516769d28444b49bf2553c1a9d8b27.
> Detected unsafe path transition / -> /var during canonicalization of /var/log/journal/82516769d28444b49bf2553c1a9d8b27.
> Detected unsafe path transition / -> /var during canonicalization of /var/log/journal/82516769d28444b49bf2553c1a9d8b27.
> Detected unsafe path transition / -> /var during canonicalization of /var/log/journal/82516769d28444b49bf2553c1a9d8b27/system.journal.
> Detected unsafe path transition / -> /var during canonicalization of /var/log/journal/82516769d28444b49bf2553c1a9d8b27/system.journal.
> dpkg: error processing package systemd (--configure):
>  installed systemd package post-installation script subprocess returned error exit status 73

<https://github.com/systemd/systemd/issues/11282> suggests an ownership
misconfiguration could be responsible.  Thus, seeing the output of the ls
command may help.