From: "Theo de Raadt" <deraadt@openbsd.org>
Subject: Re: Don't detach volumes that have mounted partitions
To: Luis Henriques <henrix@camandro.org>
Cc: tech@openbsd.org
Date: Wed, 06 Mar 2024 21:03:27 -0700

Another point:

Doing this in userland is a race.  If anything is going to do it,
it should be the kernel preventing this itself.