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net: annotate lockless accesses to sk->sk_max_ack_backlog

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sk->sk_max_ack_backlog can be read without any lock being held
at least in TCP/DCCP cases.

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 14:11:54 -08:00
committed by David S. Miller
parent 288efe8606
commit 099ecf59f0
9 changed files with 10 additions and 10 deletions
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2
include/net/sock.h
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@@ -869,7 +869,7 @@ static inline void sk_acceptq_added(struct sock *sk)
static inline bool sk_acceptq_is_full(const struct sock *sk)
{
return READ_ONCE(sk->sk_ack_backlog) > sk->sk_max_ack_backlog;
return READ_ONCE(sk->sk_ack_backlog) > READ_ONCE(sk->sk_max_ack_backlog);
}
/*