tcp: Fix data-races around some timeout sysctl knobs.

[linux-block.git] / include / net / tcp.h

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 204478d5d3887959ff5ca43a5df393bcb41fa5a9..23ccaa3867462e7fc4405dda22046bd911bf8427 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -1523,7 +1523,8 @@ static inline u32 keepalive_time_elapsed(const struct tcp_sock *tp)
 
 static inline int tcp_fin_time(const struct sock *sk)
 {
-       int fin_timeout = tcp_sk(sk)->linger2 ? : sock_net(sk)->ipv4.sysctl_tcp_fin_timeout;
+       int fin_timeout = tcp_sk(sk)->linger2 ? :
+               READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_fin_timeout);
        const int rto = inet_csk(sk)->icsk_rto;
 
        if (fin_timeout < (rto << 2) - (rto >> 1))