[git pull] vfs fixes

[Al Viro]

	Assorted fixes.  Some of that is only a matter with fault injection
(broken handling of small allocation failure in various mount-related places),
but the last one is a root-triggerable stack overflow, and combined with
userns it gets really nasty ;-/

The following changes since commit 60cc43fc888428bb2f18f08997432d426a243338:

  Linux 4.17-rc1 (2018-04-15 18:24:20 -0700)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git for-linus

for you to fetch changes up to 16a34adb9392b2fe4195267475ab5b472e55292c:

  Don't leak MNT_INTERNAL away from internal mounts (2018-04-19 23:52:15 -0400)

----------------------------------------------------------------
Al Viro (5):
      hypfs_kill_super(): deal with failed allocations
      jffs2_kill_sb(): deal with failed allocations
      orangefs_kill_sb(): deal with allocation failures
      rpc_pipefs: fix double-dput()
      Don't leak MNT_INTERNAL away from internal mounts

Tetsuo Handa (1):
      mm,vmscan: Allow preallocating memory for register_shrinker().

 arch/s390/hypfs/inode.c  |  2 +-
 fs/jffs2/super.c         |  2 +-
 fs/namespace.c           |  3 ++-
 fs/orangefs/super.c      |  5 +++++
 fs/super.c               |  9 ++++-----
 include/linux/shrinker.h |  7 +++++--
 mm/vmscan.c              | 21 ++++++++++++++++++++-
 net/sunrpc/rpc_pipe.c    |  1 +
 8 files changed, 39 insertions(+), 11 deletions(-)