man open_tree says: > mount propagation > (as described in > .BR mount_namespaces (7)) > will not be applied to bind-mounts created by > .BR open_tree () > until the bind-mount is attached with > .BR move_mount (2), It seems this is wrong, because this commit exists: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=06b1ce966e3f8bfef261c111feb3d4b33ede0cd8 . I'm not sure about this. (I didn't test this.) -- Askar Safin https://types.pl/@safinaskar
