From: Eric Dumazet <edumazet@google.com>
To: "David S . Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>,
Paolo Abeni <pabeni@redhat.com>
Cc: netdev@vger.kernel.org, eric.dumazet@gmail.com,
Eric Dumazet <edumazet@google.com>
Subject: [PATCH net 10/11] tcp: annotate data-races around icsk->icsk_user_timeout
Date: Wed, 19 Jul 2023 21:28:56 +0000 [thread overview]
Message-ID: <20230719212857.3943972-11-edumazet@google.com> (raw)
In-Reply-To: <20230719212857.3943972-1-edumazet@google.com>
This field can be read locklessly from do_tcp_getsockopt()
Fixes: dca43c75e7e5 ("tcp: Add TCP_USER_TIMEOUT socket option.")
Signed-off-by: Eric Dumazet <edumazet@google.com>
---
net/ipv4/tcp.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 2b2241e9b492726562a6b5055cf8c168e5fed799..3e137e9a18f552a02d8c74e1af34ba2356e4d8ed 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -3300,7 +3300,7 @@ EXPORT_SYMBOL(tcp_sock_set_syncnt);
void tcp_sock_set_user_timeout(struct sock *sk, u32 val)
{
lock_sock(sk);
- inet_csk(sk)->icsk_user_timeout = val;
+ WRITE_ONCE(inet_csk(sk)->icsk_user_timeout, val);
release_sock(sk);
}
EXPORT_SYMBOL(tcp_sock_set_user_timeout);
@@ -3620,7 +3620,7 @@ int do_tcp_setsockopt(struct sock *sk, int level, int optname,
if (val < 0)
err = -EINVAL;
else
- icsk->icsk_user_timeout = val;
+ WRITE_ONCE(icsk->icsk_user_timeout, val);
break;
case TCP_FASTOPEN:
@@ -4141,7 +4141,7 @@ int do_tcp_getsockopt(struct sock *sk, int level,
break;
case TCP_USER_TIMEOUT:
- val = icsk->icsk_user_timeout;
+ val = READ_ONCE(icsk->icsk_user_timeout);
break;
case TCP_FASTOPEN:
--
2.41.0.255.g8b1d071c50-goog
next prev parent reply other threads:[~2023-07-19 21:29 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-19 21:28 [PATCH net 00/11] tcp: add missing annotations Eric Dumazet
2023-07-19 21:28 ` [PATCH net 01/11] tcp: annotate data-races around tp->tcp_tx_delay Eric Dumazet
2023-07-19 21:28 ` [PATCH net 02/11] tcp: annotate data-races around tp->tsoffset Eric Dumazet
2023-07-19 21:28 ` [PATCH net 03/11] tcp: annotate data-races around tp->keepalive_time Eric Dumazet
2023-07-19 21:28 ` [PATCH net 04/11] tcp: annotate data-races around tp->keepalive_intvl Eric Dumazet
2023-07-19 21:28 ` [PATCH net 05/11] tcp: annotate data-races around tp->keepalive_probes Eric Dumazet
2023-07-19 21:28 ` [PATCH net 06/11] tcp: annotate data-races around icsk->icsk_syn_retries Eric Dumazet
2023-07-19 21:28 ` [PATCH net 07/11] tcp: annotate data-races around tp->linger2 Eric Dumazet
2023-07-19 21:28 ` [PATCH net 08/11] tcp: annotate data-races around rskq_defer_accept Eric Dumazet
2023-07-19 21:28 ` [PATCH net 09/11] tcp: annotate data-races around tp->notsent_lowat Eric Dumazet
2023-07-19 21:28 ` Eric Dumazet [this message]
2023-07-19 21:28 ` [PATCH net 11/11] tcp: annotate data-races around fastopenq.max_qlen Eric Dumazet
2023-07-20 19:50 ` [PATCH net 00/11] tcp: add missing annotations patchwork-bot+netdevbpf
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