net, sctp: convert sctp_datamsg.refcnt from atomic_t to refcount_t
authorReshetova, Elena <elena.reshetova@intel.com>
Tue, 4 Jul 2017 12:53:25 +0000 (15:53 +0300)
committerDavid S. Miller <davem@davemloft.net>
Tue, 4 Jul 2017 21:35:18 +0000 (22:35 +0100)
commitc0acdfb409c82047853df1e5f3dbdbe4005c78ae
treea6995fa5b5b72c721c3280e716822b1be26c8c3c
parent6871584a5e493a9fa3ad330a73966908b082deac
net, sctp: convert sctp_datamsg.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/sctp/structs.h
net/sctp/chunk.c