Comment 0 for bug 1934775

Installing has crashed in the latest stages of the installation, apparently due to not being able to unmount /target/sys. The error I see in the log is:

 Running command ['umount', '/target/sys/firmware/efi/efivars'] with allowed return codes [0] (capture=False)
 Running command ['umount', '/target/sys'] with allowed return codes [0] (capture=False)
 umount: /target/sys: target is busy.

Mount shows that there is something else still mounted in target/sys:

sysfs on /target/sys type sysfs (rw,nosuid,nodev,noexec,relatime)
fusectl on /target/sys/fs/fuse/connections type fusectl (rw,nosuid,nodev,noexec,relatime)

This fails:
# umount /target/sys
But this is successful:
# umount /target/sys/fs/fuse/connections
# umount /target/sys

See attached file with the crash.