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authorReshetova, Elena <elena.reshetova@intel.com>2017-07-04 15:53:22 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-04 22:35:18 +0100
commit850a6212c6fa151076dca045821c75025723bc46 (patch)
tree05ba27bc5946f2af54946666f19f878375bc29ea /include/net
parent88755e9c7c0027fb432ac808326103bc9438d5ea (diff)
downloadlinux-850a6212c6fa151076dca045821c75025723bc46.tar.bz2
net, xfrm: convert xfrm_policy.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.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index f5272a275e8f..e1bd1de2d66a 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -560,7 +560,7 @@ struct xfrm_policy {
/* This lock only affects elements except for entry. */
rwlock_t lock;
- atomic_t refcnt;
+ refcount_t refcnt;
struct timer_list timer;
struct flow_cache_object flo;
@@ -816,14 +816,14 @@ static inline void xfrm_audit_state_icvfail(struct xfrm_state *x,
static inline void xfrm_pol_hold(struct xfrm_policy *policy)
{
if (likely(policy != NULL))
- atomic_inc(&policy->refcnt);
+ refcount_inc(&policy->refcnt);
}
void xfrm_policy_destroy(struct xfrm_policy *policy);
static inline void xfrm_pol_put(struct xfrm_policy *policy)
{
- if (atomic_dec_and_test(&policy->refcnt))
+ if (refcount_dec_and_test(&policy->refcnt))
xfrm_policy_destroy(policy);
}