[Precise][CVE-2014-7970][PATCH 0/3] mnt: Prevent pivot_root from creating a loop in the mount tree

[Luis Henriques]

Following this email, I am sending the backport of the CVE-2014-7970
fix for Precise.  The first 2 patches are prereqs for the actual fix
(the 3rd patch).

These 3 patches seem a bit intrusive, but most of the are actually
cleanups -- but the code churn is still a bit high.

Al Viro (2):
  vfs: new internal helper: mnt_has_parent(mnt)
  vfs: more mnt_parent cleanups

Eric W. Biederman (1):
  mnt: Prevent pivot_root from creating a loop in the mount tree

 fs/dcache.c    | 29 ++---------------------------
 fs/mount.h     |  6 ++++++
 fs/namespace.c | 57 ++++++++++++++++++++++++++++++++++++---------------------
 fs/pnode.c     | 15 ---------------
 fs/pnode.h     |  4 +++-
 5 files changed, 47 insertions(+), 64 deletions(-)
 create mode 100644 fs/mount.h

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2.1.4