net: Fix data-races around sysctl_[rw]mem(_offset)?.

[mirror_ubuntu-jammy-kernel.git] / net / mptcp / protocol.c

diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 01ede89e3c46cb689bcf894610bf1ddcd8877688..7f96e0c42a0905e2de8ea3925d855a52cd7d23d6 100644 (file)
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -1899,7 +1899,7 @@ static void mptcp_rcv_space_adjust(struct mptcp_sock *msk, int copied)
 
                do_div(rcvwin, advmss);
                rcvbuf = min_t(u64, rcvwin * rcvmem,
-                              sock_net(sk)->ipv4.sysctl_tcp_rmem[2]);
+                              READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_rmem[2]));
 
                if (rcvbuf > sk->sk_rcvbuf) {
                        u32 window_clamp;
@@ -2532,8 +2532,8 @@ static int mptcp_init_sock(struct sock *sk)
        icsk->icsk_ca_ops = NULL;
 
        sk_sockets_allocated_inc(sk);
-       sk->sk_rcvbuf = sock_net(sk)->ipv4.sysctl_tcp_rmem[1];
-       sk->sk_sndbuf = sock_net(sk)->ipv4.sysctl_tcp_wmem[1];
+       sk->sk_rcvbuf = READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_rmem[1]);
+       sk->sk_sndbuf = READ_ONCE(sock_net(sk)->ipv4.sysctl_tcp_wmem[1]);
 
        return 0;
 }