Hi Eric,
Here's another update to my patches for mouning with fuse from
unpivileged user namespaces. The main change here is a fix for a build
failure when fuse is built as a module. As usual the series is also
available at:
git://git.kernel.org/pub/scm/linux/kernel/git/sforshee/linux.git fuse-userns
Changes since v3:
* Export current_in_userns() to fix an error when fuse is built as a
module.
* Add comment explaining the conditions for allowing CAP_CHOWN in
s_user_ns to change the owner or group of an inode.
* Added acks from Serge.
Thanks,
Seth
---
Andy Lutomirski (1):
fs: Treat foreign mounts as nosuid
Pavel Tikhomirov (1):
fs: fix a posible leak of allocated superblock
Seth Forshee (19):
fs: Remove check of s_user_ns for existing mounts in
fs_fully_visible()
fs: Allow sysfs and cgroupfs to share super blocks between user
namespaces
block_dev: Support checking inode permissions in lookup_bdev()
block_dev: Check permissions towards block device inode when mounting
selinux: Add support for unprivileged mounts from user namespaces
userns: Replace in_userns with current_in_userns
Smack: Handle labels consistently in untrusted mounts
fs: Check for invalid i_uid in may_follow_link()
cred: Reject inodes with invalid ids in set_create_file_as()
fs: Refuse uid/gid changes which don't map into s_user_ns
fs: Update posix_acl support to handle user namespace mounts
fs: Allow superblock owner to change ownership of inodes with
unmappable ids
fs: Don't remove suid for CAP_FSETID in s_user_ns
fs: Allow superblock owner to access do_remount_sb()
capabilities: Allow privileged user in s_user_ns to set security.*
xattrs
fuse: Add support for pid namespaces
fuse: Support fuse filesystems outside of init_user_ns
fuse: Restrict allow_other to the superblock's namespace or a
descendant
fuse: Allow user namespace mounts
drivers/md/bcache/super.c | 2 +-
drivers/md/dm-table.c | 2 +-
drivers/mtd/mtdsuper.c | 2 +-
fs/attr.c | 73 ++++++++++++++++++++++++++++++++++++-----
fs/block_dev.c | 18 ++++++++--
fs/exec.c | 2 +-
fs/fuse/cuse.c | 3 +-
fs/fuse/dev.c | 26 +++++++++++----
fs/fuse/dir.c | 16 ++++-----
fs/fuse/file.c | 22 ++++++++++---
fs/fuse/fuse_i.h | 10 +++++-
fs/fuse/inode.c | 40 ++++++++++++++--------
fs/inode.c | 3 +-
fs/kernfs/inode.c | 2 ++
fs/namei.c | 2 +-
fs/namespace.c | 20 ++++++++---
fs/posix_acl.c | 67 +++++++++++++++++++++++--------------
fs/proc/base.c | 2 ++
fs/proc/generic.c | 3 ++
fs/proc/proc_sysctl.c | 2 ++
fs/quota/quota.c | 2 +-
fs/super.c | 7 +++-
fs/sysfs/mount.c | 3 +-
fs/xattr.c | 19 ++++++++---
include/linux/fs.h | 3 +-
include/linux/mount.h | 1 +
include/linux/posix_acl_xattr.h | 17 +++++++---
include/linux/uidgid.h | 10 ++++++
include/linux/user_namespace.h | 6 ++--
kernel/cgroup.c | 4 +--
kernel/cred.c | 2 ++
kernel/user_namespace.c | 7 ++--
security/commoncap.c | 22 +++++++++----
security/selinux/hooks.c | 25 +++++++++++++-
security/smack/smack_lsm.c | 29 ++++++++++------
35 files changed, 355 insertions(+), 119 deletions(-)
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