Message ID | 1488828235.9415.390.camel@edumazet-glaptop3.roam.corp.google.com |
---|---|
State | Accepted, archived |
Delegated to: | David Miller |
Headers | show |
From: Eric Dumazet <eric.dumazet@gmail.com> Date: Mon, 06 Mar 2017 11:23:55 -0800 > From: Eric Dumazet <edumazet@google.com> > > __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> Applied.
diff --git a/include/net/sock.h b/include/net/sock.h index 5e5997654db6454f82179cc35c4bc22e89d0c06f..6db7693b9e61854abaa461706f2678c6d429b73f 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); }