commit 490b54d6fb75f6ffd0471ec58bb38a992e2b40cd
author Elena Reshetova <elena.reshetova@intel.com> Fri Mar 03 10:55:12 2017 +0200
committer David Sterba <dsterba@suse.com> Tue Apr 18 14:07:23 2017 +0200
tree a7f431ea6a0f4369ba43be8736090efd54d6998b
parent 9b64f57ddf8673d29fafb3405d4aa1e93f5a4cd7

btrfs: convert extent_map.refs from atomic_t to refcount_t

refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.

Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>