diff options
| author | Eric Dumazet | 2023-03-15 20:57:46 +0000 |
|---|---|---|
| committer | David S. Miller | 2023-03-17 08:25:05 +0000 |
| commit | cc04410af7de348234ac36a5f50c4ce416efdb4b (patch) | |
| tree | 75841af050a1b03bf75faad8c2bc9e5806d3512b /net | |
| parent | 9ae8e5ad99b8ebcd3d3dd46075f3825e6f08f063 (diff) | |
af_unix: annotate lockless accesses to sk->sk_err
unix_poll() and unix_dgram_poll() read sk->sk_err
without any lock held.
Add relevant READ_ONCE()/WRITE_ONCE() annotations.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/unix/af_unix.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 0b0f18ecce44..fb31e8a4409e 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -557,7 +557,7 @@ static void unix_dgram_disconnected(struct sock *sk, struct sock *other) * when peer was not connected to us. */ if (!sock_flag(other, SOCK_DEAD) && unix_peer(other) == sk) { - other->sk_err = ECONNRESET; + WRITE_ONCE(other->sk_err, ECONNRESET); sk_error_report(other); } } @@ -630,7 +630,7 @@ static void unix_release_sock(struct sock *sk, int embrion) /* No more writes */ skpair->sk_shutdown = SHUTDOWN_MASK; if (!skb_queue_empty(&sk->sk_receive_queue) || embrion) - skpair->sk_err = ECONNRESET; + WRITE_ONCE(skpair->sk_err, ECONNRESET); unix_state_unlock(skpair); skpair->sk_state_change(skpair); sk_wake_async(skpair, SOCK_WAKE_WAITD, POLL_HUP); @@ -3165,7 +3165,7 @@ static __poll_t unix_poll(struct file *file, struct socket *sock, poll_table *wa mask = 0; /* exceptional events? */ - if (sk->sk_err) + if (READ_ONCE(sk->sk_err)) mask |= EPOLLERR; if (sk->sk_shutdown == SHUTDOWN_MASK) mask |= EPOLLHUP; @@ -3208,7 +3208,8 @@ static __poll_t unix_dgram_poll(struct file *file, struct socket *sock, mask = 0; /* exceptional events? */ - if (sk->sk_err || !skb_queue_empty_lockless(&sk->sk_error_queue)) + if (READ_ONCE(sk->sk_err) || + !skb_queue_empty_lockless(&sk->sk_error_queue)) mask |= EPOLLERR | (sock_flag(sk, SOCK_SELECT_ERR_QUEUE) ? EPOLLPRI : 0); |