net, xfrm: convert xfrm_state.refcnt from atomic_t to refcount_t
authorReshetova, Elena <elena.reshetova@intel.com>
Tue, 4 Jul 2017 12:53:21 +0000 (15:53 +0300)
committerDavid S. Miller <davem@davemloft.net>
Tue, 4 Jul 2017 21:35:18 +0000 (22:35 +0100)
commit88755e9c7c0027fb432ac808326103bc9438d5ea
tree8f196725c67fe8a03c4edb67f2fbad2a9a2e485b
parent5534a51ab79f8925ee33d9830646f5e6df27eb54
net, xfrm: convert xfrm_state.refcnt 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 S. Miller <davem@davemloft.net>
include/net/xfrm.h
net/xfrm/xfrm_state.c