diff options
| author | Reshetova, Elena <elena.reshetova@intel.com> | 2017-07-04 15:53:21 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-05 00:35:18 +0300 |
| commit | 88755e9c7c0027fb432ac808326103bc9438d5ea (patch) | |
| tree | 8f196725c67fe8a03c4edb67f2fbad2a9a2e485b /include/net | |
| parent | 5534a51ab79f8925ee33d9830646f5e6df27eb54 (diff) | |
| download | linux-88755e9c7c0027fb432ac808326103bc9438d5ea.tar.xz | |
net, xfrm: convert xfrm_state.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>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/xfrm.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h index 01fa357e9a32..f5272a275e8f 100644 --- a/include/net/xfrm.h +++ b/include/net/xfrm.h @@ -13,6 +13,7 @@ #include <linux/mutex.h> #include <linux/audit.h> #include <linux/slab.h> +#include <linux/refcount.h> #include <net/sock.h> #include <net/dst.h> @@ -137,7 +138,7 @@ struct xfrm_state { struct hlist_node bysrc; struct hlist_node byspi; - atomic_t refcnt; + refcount_t refcnt; spinlock_t lock; struct xfrm_id id; @@ -837,18 +838,18 @@ void __xfrm_state_destroy(struct xfrm_state *); static inline void __xfrm_state_put(struct xfrm_state *x) { - atomic_dec(&x->refcnt); + refcount_dec(&x->refcnt); } static inline void xfrm_state_put(struct xfrm_state *x) { - if (atomic_dec_and_test(&x->refcnt)) + if (refcount_dec_and_test(&x->refcnt)) __xfrm_state_destroy(x); } static inline void xfrm_state_hold(struct xfrm_state *x) { - atomic_inc(&x->refcnt); + refcount_inc(&x->refcnt); } static inline bool addr_match(const void *token1, const void *token2, |