net, rds: convert rds_mr.r_refcount from atomic_t to refcount_t
authorReshetova, Elena <elena.reshetova@intel.com>
Tue, 4 Jul 2017 12:53:17 +0000 (15:53 +0300)
committerDavid S. Miller <davem@davemloft.net>
Tue, 4 Jul 2017 21:35:17 +0000 (22:35 +0100)
commit803ea85053b75d35f9ebb3aa7a28db35d82c6d82
treec3533e07eb69e00552a416b1d8b5f3d0e97195d3
parentb7f0292094cbe31f82f2cd9623c8356cc7cf9566
net, rds: convert rds_mr.r_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>
net/rds/rdma.c
net/rds/rds.h