net, ipv4: convert fib_info.fib_clntref from atomic_t to refcount_t
authorReshetova, Elena <elena.reshetova@intel.com>
Tue, 4 Jul 2017 06:35:02 +0000 (09:35 +0300)
committerDavid S. Miller <davem@davemloft.net>
Tue, 4 Jul 2017 08:29:04 +0000 (01:29 -0700)
commit0029c0deb590bc18732327d53b8fdab12eec6d7c
treef7c443301baeff0f7e2fcf848bfb8f6545e74146
parentf6a6fede28e3cc3f9e4669a12839b47011330d95
net, ipv4: convert fib_info.fib_clntref 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/ip_fib.h
net/ipv4/fib_semantics.c
net/ipv4/fib_trie.c