net: use proper lockdep annotation in __sk_dst_set()
__sk_dst_set() must be called while we own the socket.
We can get proper lockdep coverage using lockdep_sock_is_held()
and rcu_dereference_protected()
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/sock.h b/include/net/sock.h
index 5e59976..6db7693 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -1780,11 +1780,8 @@ __sk_dst_set(struct sock *sk, struct dst_entry *dst)
sk_tx_queue_clear(sk);
sk->sk_dst_pending_confirm = 0;
- /*
- * This can be called while sk is owned by the caller only,
- * with no state that can be checked in a rcu_dereference_check() cond
- */
- old_dst = rcu_dereference_raw(sk->sk_dst_cache);
+ old_dst = rcu_dereference_protected(sk->sk_dst_cache,
+ lockdep_sock_is_held(sk));
rcu_assign_pointer(sk->sk_dst_cache, dst);
dst_release(old_dst);
}