On Mon, Jan 04, 2016 at 12:03:39PM -0600, Seth Forshee wrote: > These patches implement support for mounting filesystems in user > namespaces using fuse. They are based on the patches in the for-testing > branch of > git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace.git, > but I've rebased them onto 4.4-rc3. I've pushed all of this to: > > git://git.kernel.org/pub/scm/linux/kernel/git/sforshee/linux.git fuse-userns > > The patches are organized into three high-level groups. > > Patches 1-6 are related to security, adding restrictions for > unprivileged mounts and updating the LSMs as needed. Patches 1-2 > (checking inode permissions for block device mounts) may not be strictly > necessary for fuseblk mounts since fuse doesn't do any IO on the block > device in the kernel, but it still seems like a good idea to fail the > mount if the user doesn't have the required permissions for the inode > (though this is a bit misleading with fuse since the mounts are done via > a suid-root helper). > > Patches 7-14 update most of the vfs to translate ids correctly and deal > with inodes which may have invalid user/group ids. I've omitted patches > for anything not used by fuse - quota, fs freezing, some helper > functions, etc. - but if these are wanted for the sake of completeness I > can include them. > > Patches 15-18 update fuse to deal with mounts from non-init pid and user > namespaces and enable mounting from user namespaces. > > Changes since v1: > - Drop patch for FIBMAP. > - Use current_in_userns in fuse_allow_current_process. > - Remove checks for uid/gid validity in fuse. Intead, ids from the > backing store which do not map into s_user_ns will result in invalid > ids in the vfs inode. Checks in the vfs will prevent unmappable ids > from being passed in from above. > - Update a couple of commit messages to provide more detail about > changes. Now that the merge window is over, I'm wondering whether it might be possible to get some feedback on these patches this cycle? Thanks, Seth -- 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
