[GIT PULL] of: overlay: validation checks, subsequent fixes for v20

[Frank Rowand <frowand.list@gmail.com>]

Hi Rob,

Please pull the changes to add the overlay validation checks.

This is the v7 version of the patch series.

-Frank


The following changes since commit 651022382c7f8da46cb4872a545ee1da6d097d2a:

  Linux 4.20-rc1 (2018-11-04 15:37:52 -0800)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/frowand/linux.git tags/kfree_validate_v7-for-4.20

for you to fetch changes up to eeb07c573ec307c53fe2f6ac6d8d11c261f64006:

  of: unittest: initialize args before calling of_*parse_*() (2018-11-08 22:12:37 -0800)

----------------------------------------------------------------
Add checks to (1) overlay apply process and (2) memory freeing
triggered by overlay release.  The checks are intended to detect
possible memory leaks and invalid overlays.

The checks revealed bugs in existing code.  Fixed the bugs.

While fixing bugs, noted other issues, which are fixed in
separate patches.

----------------------------------------------------------------
Frank Rowand (17):
      of: overlay: add tests to validate kfrees from overlay removal
      of: overlay: add missing of_node_put() after add new node to changeset
      of: overlay: add missing of_node_get() in __of_attach_node_sysfs
      powerpc/pseries: add of_node_put() in dlpar_detach_node()
      of: overlay: use prop add changeset entry for property in new nodes
      of: overlay: do not duplicate properties from overlay for new nodes
      of: overlay: reorder fields in struct fragment
      of: overlay: validate overlay properties #address-cells and #size-cells
      of: overlay: make all pr_debug() and pr_err() messages unique
      of: overlay: test case of two fragments adding same node
      of: overlay: check prevents multiple fragments add or delete same node
      of: overlay: check prevents multiple fragments touching same property
      of: unittest: remove unused of_unittest_apply_overlay() argument
      of: overlay: set node fields from properties when add new overlay node
      of: unittest: allow base devicetree to have symbol metadata
      of: unittest: find overlays[] entry by name instead of index
      of: unittest: initialize args before calling of_*parse_*()

 arch/powerpc/platforms/pseries/dlpar.c             |   2 +
 drivers/of/dynamic.c                               |  59 ++++-
 drivers/of/kobj.c                                  |   4 +-
 drivers/of/overlay.c                               | 292 ++++++++++++++++-----
 drivers/of/unittest-data/Makefile                  |   2 +
 .../of/unittest-data/overlay_bad_add_dup_node.dts  |  28 ++
 .../of/unittest-data/overlay_bad_add_dup_prop.dts  |  24 ++
 drivers/of/unittest-data/overlay_base.dts          |   1 +
 drivers/of/unittest.c                              |  96 +++++--
 include/linux/of.h                                 |  21 +-
 10 files changed, 432 insertions(+), 97 deletions(-)
 create mode 100644 drivers/of/unittest-data/overlay_bad_add_dup_node.dts
 create mode 100644 drivers/of/unittest-data/overlay_bad_add_dup_prop.dts