net, ipv6: convert ifmcaddr6.mca_refcnt from atomic_t to refcount_t
authorReshetova, Elena <elena.reshetova@intel.com>
Tue, 4 Jul 2017 06:34:57 +0000 (09:34 +0300)
committerDavid S. Miller <davem@davemloft.net>
Tue, 4 Jul 2017 08:29:04 +0000 (01:29 -0700)
commitd3981bc615f652b9ead0762dd180125ac2b21a3a
treeec29e37211e9ac8e862d019735c539a34dfdabee
parent271201c09c86cd75e0fd6206bde689176e85aa21
net, ipv6: convert ifmcaddr6.mca_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/if_inet6.h
net/ipv6/mcast.c