On Fri, Sep 25, 2026 at 6:45 AM Christian Brauner <[email protected]> wrote: > > On Wed, Sep 23, 2026 at 01:50:25PM -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(). > > This was reported to crun in [1]. > > Yeah, I think that makes sense. Please split this into two patches > though: semantic changes separate from test changes. Maybe call it > OPEN_TREE_DROP_MNTNS_MOUNTS instead?
Thanks! Done in v2: https://lore.kernel.org/r/[email protected]
