Re: [PATCH v15 0/4] SELinux support for anonymous inodes and UFFD

On Fri, Jan 8, 2021 at 5:22 PM Lokesh Gidra [off-list ref] wrote:

Userfaultfd in unprivileged contexts could be potentially very
useful. We'd like to harden userfaultfd to make such unprivileged use
less risky. This patch series allows SELinux to manage userfaultfd
file descriptors and in the future, other kinds of
anonymous-inode-based file descriptor.

...

Daniel Colascione (3):
  fs: add LSM-supporting anon-inode interface
  selinux: teach SELinux about anonymous inodes
  userfaultfd: use secure anon inodes for userfaultfd

Lokesh Gidra (1):
  security: add inode_init_security_anon() LSM hook

 fs/anon_inodes.c                    | 150 ++++++++++++++++++++--------
 fs/libfs.c                          |   5 -
 fs/userfaultfd.c                    |  19 ++--
 include/linux/anon_inodes.h         |   5 +
 include/linux/lsm_hook_defs.h       |   2 +
 include/linux/lsm_hooks.h           |   9 ++
 include/linux/security.h            |  10 ++
 security/security.c                 |   8 ++
 security/selinux/hooks.c            |  57 +++++++++++
 security/selinux/include/classmap.h |   2 +
 10 files changed, 213 insertions(+), 54 deletions(-)

With several rounds of reviews done and the corresponding SELinux test
suite looking close to being ready I think it makes sense to merge
this via the SELinux tree.  VFS folks, if you have any comments or
objections please let me know soon.  If I don't hear anything within
the next day or two I'll go ahead and merge this for linux-next.

Thanks.

-- 
paul moore
www.paul-moore.com