[PATCH 0/2] of: phandle_cache, fix refcounts, remove stale entry

[frowand . list]

From: Frank Rowand <frank.rowand@xxxxxxxx>

Non-overlay dynamic devicetree node removal may leave the node in
the phandle cache.  Subsequent calls to of_find_node_by_phandle()
will incorrectly find the stale entry.  This bug exposed the foloowing
phandle cache refcount bug.

The refcount of phandle_cache entries is not incremented while in
the cache, allowing use after free error after kfree() of the
cached entry.

Frank Rowand (2):
  of: of_node_get()/of_node_put() nodes held in phandle cache
  of: __of_detach_node() - remove node from phandle cache

 drivers/of/base.c       | 99 ++++++++++++++++++++++++++++++++++++-------------
 drivers/of/dynamic.c    |  3 ++
 drivers/of/of_private.h |  4 ++
 3 files changed, 81 insertions(+), 25 deletions(-)

-- 
Frank Rowand <frank.rowand@xxxxxxxx>