net, ax25: convert ax25_cb.refcount from atomic_t to refcount_t
authorReshetova, Elena <elena.reshetova@intel.com>
Tue, 4 Jul 2017 12:53:31 +0000 (15:53 +0300)
committerDavid S. Miller <davem@davemloft.net>
Tue, 4 Jul 2017 21:35:19 +0000 (22:35 +0100)
commitb6d52ede224836f74dff50666b6a3076a5b8c92d
treec9e439fb24a3171edd0421ee6f41cd9a974cc4ae
parent39f25d42c04959f0ddb5b14b01b27ea221736509
net, ax25: convert ax25_cb.refcount 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/ax25.h
net/ax25/af_ax25.c