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authorReshetova, Elena <elena.reshetova@intel.com>2017-06-30 13:07:56 +0300
committerDavid S. Miller <davem@davemloft.net>2017-07-01 07:39:07 -0700
commit6343944bc1050dcec7c959f484ee0fb6928db3be (patch)
treeb6e57e12f2b0c36611563fb349ece8f70e895fd5 /include/net
parent9f23743017d11c103b38d2fa1f64674baeca41cd (diff)
net: convert neigh_params.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/neighbour.h6
1 files changed, 3 insertions, 3 deletions
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index e5ee739d2b8c..afc39e3a3f7c 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -77,7 +77,7 @@ struct neigh_parms {
void *sysctl_table;
int dead;
- atomic_t refcnt;
+ refcount_t refcnt;
struct rcu_head rcu_head;
int reachable_time;
@@ -396,12 +396,12 @@ void neigh_sysctl_unregister(struct neigh_parms *p);
static inline void __neigh_parms_put(struct neigh_parms *parms)
{
- atomic_dec(&parms->refcnt);
+ refcount_dec(&parms->refcnt);
}
static inline struct neigh_parms *neigh_parms_clone(struct neigh_parms *parms)
{
- atomic_inc(&parms->refcnt);
+ refcount_inc(&parms->refcnt);
return parms;
}