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net: annotate lockless accesses to sk->sk_ack_backlog

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sk->sk_ack_backlog can be read without any lock being held.
We need to use READ_ONCE()/WRITE_ONCE() to avoid load/store tearing
and/or potential KCSAN warnings.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2019-11-05 14:11:53 -08:00
committed by David S. Miller
parent 7976a11b30
commit 288efe8606
7 changed files with 9 additions and 9 deletions
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2
net/sctp/diag.c
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@@ -425,7 +425,7 @@ static void sctp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
r->idiag_rqueue = atomic_read(&infox->asoc->rmem_alloc);
r->idiag_wqueue = infox->asoc->sndbuf_used;
} else {
r->idiag_rqueue = sk->sk_ack_backlog;
r->idiag_rqueue = READ_ONCE(sk->sk_ack_backlog);
r->idiag_wqueue = sk->sk_max_ack_backlog;
}
if (infox->sctpinfo)