[PATCH 0/2] vfs: plug some holes involving LAST_BIND symlinks and file bind mounts (try #6)

[Jeff Layton <jlayton@redhat.com>]

This patchset is another attempt to add missing dentry revalidations to
certain places in the lookup codepath. The main difference from the last
patchset is:

* I've dropped the patch that added permissions checks when chasing
  LAST_BIND symlinks. There's a lot disagreement about whether the
  current behavior is even a bug. I'd prefer to see more concensus on
  that point before we do anything here.

* I've rejiggered the error handling in this codepath to ensure that the
  bind mounts could still be unmounted. Testing showed that returning an
  error in do_lookup when a bind-mounted dentry went stale made it
  un-unmountable.

Comments and suggestions appreciated...

Jeff Layton (2):
  vfs: force reval of target when following LAST_BIND symlinks
  vfs: force reval on dentry of bind mounted files on FS_REVAL_DOT
    filesystems

 fs/namei.c |   56 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 55 insertions(+), 1 deletions(-)