net: convert ip_mc_list.refcnt from atomic_t to refcount_t
authorReshetova, Elena <elena.reshetova@intel.com>
Fri, 30 Jun 2017 10:08:02 +0000 (13:08 +0300)
committerDavid S. Miller <davem@davemloft.net>
Sat, 1 Jul 2017 14:39:08 +0000 (07:39 -0700)
commit8851ab526791530d00bbbd0952512d68684a44b8
tree243643b2d0b72bed9947ec525be6f6142e2b6840
parent41c6d650f6537e55a1b53438c646fbc3f49176bf
net: convert ip_mc_list.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/linux/igmp.h
net/ipv4/igmp.c