Dear Maintainer,
I ran into this when upgrading from stretch to buster during 2020/21
hollidays,
which means I was definitely running d-s-s 1:9+2020.12.04 from
buster-security.
The system was low on RAM and both /tmp and swap were backed by a slow
SD card.
This is caused by
/usr/share/debian-security-support/check-support-status.hook,
which is runs either for too long or too frequently.
It is most likely the latter case, because when I repeatedly execute 'ps
-A f'
during apt operation, check-support-status is listed present >60% of the
time.
I guess each invocation takes only few seconds, but it gets invoked too
often.
Cheers,
n-b-f