The entire tree for testing is available at: git.kernel.org:/pub/scm/linux/kernel/git/ebiederm/user-namespace.git for-testing This is my queue of important bug fixes for user namespaces. Most of these changes warrant being backported. A few are bug fixes for cases where only root can trigger the issue so have not been marked for being back ported to stable. A few of these patches have not been posted for review preivously, so I a giving the light of mailling list before I send them to Linus. This patchset has seen some testing already. Since there are small deliberate breakage of userspace in here the more reviewers/testers the better. Baring complictions I intend to ask Linus to pull this patchset sometime early next week. So far nothing broke on my libvirt-lxc test bed. :-) Tested with openSUSE 13.2 and libvirt 1.2.9. Tested-by: Richard Weinberger <richard@xxxxxx> Tested on Fedora20 with libvirt 1.2.11, works fine. Tested-by: Chen Hanxiao <chenhanxiao@xxxxxxxxxxxxxx> Eric W. Biederman (18): mnt: Implicitly add MNT_NODEV on remount when it was implicitly added by mount mnt: Update unprivileged remount test umount: Disallow unprivileged mount force umount: Do not allow unmounting rootfs. mnt: Move the clear of MNT_LOCKED from copy_tree to it's callers. mnt: Carefully set CL_UNPRIVILEGED in clone_mnt mnt: Clear mnt_expire during pivot_root groups: Consolidate the setgroups permission checks userns: Document what the invariant required for safe unprivileged mappings. userns: Don't allow setgroups until a gid mapping has been setablished userns: Don't allow unprivileged creation of gid mappings userns: Check euid no fsuid when establishing an unprivileged uid mapping userns: Only allow the creator of the userns unprivileged mappings userns: Rename id_map_mutex to userns_state_mutex userns: Add a knob to disable setgroups on a per user namespace basis userns: Allow setting gid_maps without privilege when setgroups is disabled userns; Correct the comment in map_write userns: Unbreak the unprivileged remount tests -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html