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From: Eric Dumazet <eric.dumazet@gmail.com>
To: "David S . Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>
Cc: netdev <netdev@vger.kernel.org>,
	Eric Dumazet <edumazet@google.com>,
	Eric Dumazet <eric.dumazet@gmail.com>
Subject: [PATCH net-next 07/10] net_sched: em_meta: add READ_ONCE() in var_sk_bound_if()
Date: Wed, 11 May 2022 16:37:54 -0700	[thread overview]
Message-ID: <20220511233757.2001218-8-eric.dumazet@gmail.com> (raw)
In-Reply-To: <20220511233757.2001218-1-eric.dumazet@gmail.com>

From: Eric Dumazet <edumazet@google.com>

sk->sk_bound_dev_if can change under us, use READ_ONCE() annotation.

Signed-off-by: Eric Dumazet <edumazet@google.com>
---
 net/sched/em_meta.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/net/sched/em_meta.c b/net/sched/em_meta.c
index 0a04468b73145546097788db0645ef9e5b459bca..49bae3d5006b0f83330b4cbe30344c0741743575 100644
--- a/net/sched/em_meta.c
+++ b/net/sched/em_meta.c
@@ -311,12 +311,15 @@ META_COLLECTOR(int_sk_bound_if)
 
 META_COLLECTOR(var_sk_bound_if)
 {
+	int bound_dev_if;
+
 	if (skip_nonlocal(skb)) {
 		*err = -1;
 		return;
 	}
 
-	if (skb->sk->sk_bound_dev_if == 0) {
+	bound_dev_if = READ_ONCE(skb->sk->sk_bound_dev_if);
+	if (bound_dev_if == 0) {
 		dst->value = (unsigned long) "any";
 		dst->len = 3;
 	} else {
@@ -324,7 +327,7 @@ META_COLLECTOR(var_sk_bound_if)
 
 		rcu_read_lock();
 		dev = dev_get_by_index_rcu(sock_net(skb->sk),
-					   skb->sk->sk_bound_dev_if);
+					   bound_dev_if);
 		*err = var_dev(dev, dst);
 		rcu_read_unlock();
 	}
-- 
2.36.0.512.ge40c2bad7a-goog


  parent reply	other threads:[~2022-05-11 23:38 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-11 23:37 [PATCH net-next 00/10] net: add annotations for sk->sk_bound_dev_if Eric Dumazet
2022-05-11 23:37 ` [PATCH net-next 01/10] net: annotate races around sk->sk_bound_dev_if Eric Dumazet
2022-05-11 23:37 ` [PATCH net-next 02/10] sctp: read sk->sk_bound_dev_if once in sctp_rcv() Eric Dumazet
2022-05-11 23:37 ` [PATCH net-next 03/10] tcp: sk->sk_bound_dev_if once in inet_request_bound_dev_if() Eric Dumazet
2022-05-11 23:37 ` [PATCH net-next 04/10] net: core: add READ_ONCE/WRITE_ONCE annotations for sk->sk_bound_dev_if Eric Dumazet
2022-05-11 23:37 ` [PATCH net-next 05/10] dccp: use READ_ONCE() to read sk->sk_bound_dev_if Eric Dumazet
2022-05-11 23:37 ` [PATCH net-next 06/10] inet: add READ_ONCE(sk->sk_bound_dev_if) in inet_csk_bind_conflict() Eric Dumazet
2022-05-11 23:37 ` Eric Dumazet [this message]
2022-05-11 23:37 ` [PATCH net-next 08/10] l2tp: use add READ_ONCE() to fetch sk->sk_bound_dev_if Eric Dumazet
2022-05-11 23:37 ` [PATCH net-next 09/10] ipv6: add READ_ONCE(sk->sk_bound_dev_if) in INET6_MATCH() Eric Dumazet
2022-05-12 15:48   ` kernel test robot
2022-05-13  1:00   ` kernel test robot
2022-05-11 23:37 ` [PATCH net-next 10/10] inet: add READ_ONCE(sk->sk_bound_dev_if) in INET_MATCH() Eric Dumazet
2022-05-12 13:15   ` kernel test robot
2022-05-12 16:13     ` Eric Dumazet
2022-05-12 16:13       ` Eric Dumazet
2022-05-20  8:40       ` Chen, Rong A
2022-05-20 13:17         ` Eric Dumazet
2022-05-20 13:17           ` Eric Dumazet

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