Ubuntu 20.04 systemd-coredump user ownership

Solution 1:

You can run docker as non-root. Just define a UID you like. If you run it as root it will use the coredump id.

Solution 2:

I think I've got it.

So, after I did what I described in the question, I kept on doing my regular work. What I've found is that my docker container mysql crashed when I attempted to do docker cp. This reverted the ownership of the whole HOME directory, again, to systemd-coredump.

This time, I used coredumpctl to see what went wrong:

TIME                            PID   UID   GID SIG COREFILE  EXE
Fri 2020-08-14 20:40:57 CEST   2489  1000  1000   6 present   /opt/eset/esets/bin/esets_gui
Sat 2020-08-15 00:07:00 CEST   2014  1000  1000   6 present   /usr/libexec/tracker-miner-fs

So, ESET GUI app crashed, but more importantly tracker-miner-fs also crashed. Found out I needed to remove:

• $HOME/.cache/tracker
• $HOME/.config/tracker (if exists)
• $HOME/.local/share/tracker

This way tracker would start from scratch and will not crash...