net/netlabel: Add list_next_rcu() in rcu_dereference().

Add list_next_rcu() for fetching next list in rcu_deference safely.

Found with sparse in linux-next tree on tag next-20171116.

Signed-off-by: Tim Hansen <devtimhansen@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/netlabel/netlabel_addrlist.h b/net/netlabel/netlabel_addrlist.h
index d0f38bc..ac709f0 100644 (file)
--- a/net/netlabel/netlabel_addrlist.h
+++ b/net/netlabel/netlabel_addrlist.h
@@ -87,7 +87,7 @@ static inline struct netlbl_af4list *__af4list_valid_rcu(struct list_head *s,
        struct list_head *i = s;
        struct netlbl_af4list *n = __af4list_entry(s);
        while (i != h && !n->valid) {
-               i = rcu_dereference(i->next);
+               i = rcu_dereference(list_next_rcu(i));
                n = __af4list_entry(i);
        }
        return n;
@@ -154,7 +154,7 @@ static inline struct netlbl_af6list *__af6list_valid_rcu(struct list_head *s,
        struct list_head *i = s;
        struct netlbl_af6list *n = __af6list_entry(s);
        while (i != h && !n->valid) {
-               i = rcu_dereference(i->next);
+               i = rcu_dereference(list_next_rcu(i));
                n = __af6list_entry(i);
        }
        return n;