Merge patch series "put_mnt_ns(): leave mounts connected"

Noah Orlando <Noah.Orlando@deshaw.com> says:

When a mount namespace is destroyed, put_mnt_ns() disconnects its mounts
from their mount points. A file descriptor still open on the parent of a
mount point can then be used to look under the mount point.

Locked mounts are kept connected to prevent this. However, a mount is
only locked when its tree is copied across a user namespace boundary. A
mount namespace set up by a privileged component has no locked mounts,
so its mounts are disconnected.

Pass UMOUNT_CONNECTED so every mount is kept connected, as locked mounts
already are.

* patches from https://patch.msgid.link/20260706182559.2496448-2-Noah.Orlando@deshaw.com:
  selftests/filesystems: add mntns cleanup test
  put_mnt_ns(): leave mounts connected

Link: https://patch.msgid.link/20260706182559.2496448-2-Noah.Orlando@deshaw.com
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>

0 files changed, 0 insertions, 0 deletions