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dccp: use READ_ONCE() to read sk->sk_bound_dev_if

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When reading listener sk->sk_bound_dev_if locklessly,
we must use READ_ONCE().

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2022-05-13 11:55:45 -07:00 committed by David S. Miller
parent e5fccaa1eb
commit 36f7cec4f3
2 changed files with 3 additions and 3 deletions
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2
net/dccp/ipv4.c
View file

@ -628,7 +628,7 @@ int dccp_v4_conn_request(struct sock *sk, struct sk_buff *skb)
sk_daddr_set(req_to_sk(req), ip_hdr(skb)->saddr);
ireq->ir_mark = inet_request_mark(sk, skb);
ireq->ireq_family = AF_INET;
ireq->ir_iif = sk->sk_bound_dev_if;
ireq->ir_iif = READ_ONCE(sk->sk_bound_dev_if);
/*
* Step 3: Process LISTEN state

4
net/dccp/ipv6.c
View file

@ -374,10 +374,10 @@ static int dccp_v6_conn_request(struct sock *sk, struct sk_buff *skb)
refcount_inc(&skb->users);
ireq->pktopts = skb;
}
ireq->ir_iif = sk->sk_bound_dev_if;
ireq->ir_iif = READ_ONCE(sk->sk_bound_dev_if);
/* So that link locals have meaning */
if (!sk->sk_bound_dev_if &&
if (!ireq->ir_iif &&
ipv6_addr_type(&ireq->ir_v6_rmt_addr) & IPV6_ADDR_LINKLOCAL)
ireq->ir_iif = inet6_iif(skb);