On Tue, 06 Oct 2026 23:23:55 -0700, Kir Kolyshkin wrote: > crun, a container runtime, recently started using OPEN_TREE_NAMESPACE to > set up the container's mount namespace, and open_tree(OPEN_TREE_CLONE) > for the sources of its bind mounts. This turns out not to work on hosts > that have a mount namespace pinned anywhere below such a source: the > recursive clone picks the pinned namespace up, and move_mount(2) then > refuses to attach the tree with ELOOP from check_for_nsfs_mounts(). > > [...]
Applied to the vfs-7.4.mount branch of the vfs/vfs.git tree. Patches in the vfs-7.4.mount branch should appear in linux-next soon. Please report any outstanding bugs that were missed during review in a new review to the original patch series allowing us to drop it. It's encouraged to provide Acked-bys and Reviewed-bys even though the patch has now been applied. If possible patch trailers will be updated. Note that commit hashes shown below are subject to change due to rebase, trailer updates or similar. If in doubt, please check the listed branch. tree: https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git branch: vfs-7.4.mount [1/2] mount: add OPEN_TREE_DROP_MNTNS_MOUNTS https://git.kernel.org/vfs/vfs/c/73b40395c71c [2/2] selftests/filesystems: test OPEN_TREE_DROP_MNTNS_MOUNTS https://git.kernel.org/vfs/vfs/c/e6e54e7117f6
