Quoting Christian Brauner ([email protected]): > Hello, > > booting unprivileged ubuntu trusty and vivid container I get the > following messaged when shutting them down: > > umount: /dev/zero: block devices are not permitted on filesystem
Apparently this is an error emitted by umount.c in util-linux when it gets a -EACCES. My guess is that your underlying fs has real blockdevs, and the fs is MS_NODEV, and umount is somehow finding that unmounting the file mounted over those files would violate MS_NODEV. I say somehow bc I don't see the code doing that check. Though it's also possible that umount is misdiagnosing the EACCES. Just to be sure, you could try booting the container without apparmor: lxc.aa_profile = unconfined and see if that still does it. > umount: /dev/urandom: block devices are not permitted on filesystem > umount: /dev/tty: block devices are not permitted on filesystem > umount: /dev/random: block devices are not permitted on filesystem > umount: /dev/null: block devices are not permitted on filesystem > umount: /dev/full: block devices are not permitted on filesystem > umount: /dev/console: block devices are not permitted on filesystem > > that goes for basically all device bind-mounts: > > umount: /dev/fb0: block devices are not permitted on filesystem > umount: /dev/video0: block devices are not permitted on filesystem > umount: /dev/dri: block devices are not permitted on filesystem > umount: /dev/snd: block devices are not permitted on filesystem > umount: /dev/zero: block devices are not permitted on filesystem > umount: /dev/urandom: block devices are not permitted on filesystem > umount: /dev/tty: block devices are not permitted on filesystem > umount: /dev/random: block devices are not permitted on filesystem > umount: /dev/null: block devices are not permitted on filesystem > umount: /dev/full: block devices are not permitted on filesystem > umount: /dev/console: block devices are not permitted on filesystem > > Can someone explain this? > > Best, > Christian > _______________________________________________ > lxc-users mailing list > [email protected] > http://lists.linuxcontainers.org/listinfo/lxc-users _______________________________________________ lxc-users mailing list [email protected] http://lists.linuxcontainers.org/listinfo/lxc-users
