On Tue, Dec 08, 2015 at 08:09:47AM -0700, Theo de Raadt wrote:
Currently, it's possible, (as root), to do something like:
# mount_mfs -s 1g swap /
which succeeds, and mounts the empty filesystem as the root filesystem.
This makes the machine inoperable and requires a physical reset, without a
clean shutdown, as no system binaries are available.
Shouldn't we make mount_mfs error out in this case?
what is "this case"?
mount_mfs as opposed to mount.
It's possible to mount a regular filesystem on a mount point that is
already in use, except for /, which fails with an error.
The behaviour of mount_mfs is inconsistent with that of mount, in
that it allows the root directory to be used as a mount point, whereas
mount does not.
As otto points out, using with -P is potentially useful, but without
there doesn't appear to be a use case.
--
Tati Chevron
Perl and FORTRAN specialist.
SWABSIT development and migration department.
http://www.swabsit.com
