From 099ecf59f05b5f30f42ebac0ab8cb94f9b18c90c Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Tue, 5 Nov 2019 14:11:54 -0800 Subject: net: annotate lockless accesses to sk->sk_max_ack_backlog 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 Signed-off-by: David S. Miller --- net/dccp/proto.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/dccp') diff --git a/net/dccp/proto.c b/net/dccp/proto.c index 5bad08dc4316..a52e8ba1ced0 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -944,7 +944,7 @@ int inet_dccp_listen(struct socket *sock, int backlog) if (!((1 << old_state) & (DCCPF_CLOSED | DCCPF_LISTEN))) goto out; - sk->sk_max_ack_backlog = backlog; + WRITE_ONCE(sk->sk_max_ack_backlog, backlog); /* Really, if the socket is already in listen state * we can only allow the backlog to be adjusted. */ -- cgit