net, lapb: convert lapb_cb.refcnt from atomic_t to refcount_t
authorReshetova, Elena <elena.reshetova@intel.com>
Tue, 4 Jul 2017 12:53:08 +0000 (15:53 +0300)
committerDavid S. Miller <davem@davemloft.net>
Tue, 4 Jul 2017 21:35:16 +0000 (22:35 +0100)
commit0408c58be5a475c99b271f08d85859f7b59ec767
tree100c31c9fab2ae3b9fee699c83fa798cfbb0baad
parent7b9364050246bd4c24b36b71c8990b2922dcc027
net, lapb: convert lapb_cb.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/lapb.h
net/lapb/lapb_iface.c