libceph: convert ceph_snap_context.nref from atomic_t to refcount_t
authorElena Reshetova <elena.reshetova@intel.com>
Fri, 17 Mar 2017 12:10:27 +0000 (14:10 +0200)
committerIlya Dryomov <idryomov@gmail.com>
Thu, 4 May 2017 07:19:18 +0000 (09:19 +0200)
commit06dfa96399a9a3280dd81e47f8696aa89f1783e7
tree1f5b529b617e1607087e096be6640b0208ec54aa
parent805692d0e0f7dec42b5e05fb8b2a5c172f66a3c2
libceph: convert ceph_snap_context.nref 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: Ilya Dryomov <idryomov@gmail.com>
include/linux/ceph/libceph.h
net/ceph/snapshot.c