tcp: annotate sk->sk_sndbuf lockless reads

[linux-2.6-block.git] / net / core / filter.c

diff --git a/net/core/filter.c b/net/core/filter.c
index ed6563622ce31dcced4e6ba622770e26f1f7756a..3fed5755494bd39cf55ca1806ead67609ae8b587 100644 (file)
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -4252,12 +4252,14 @@ BPF_CALL_5(bpf_setsockopt, struct bpf_sock_ops_kern *, bpf_sock,
                case SO_RCVBUF:
                        val = min_t(u32, val, sysctl_rmem_max);
                        sk->sk_userlocks |= SOCK_RCVBUF_LOCK;
-                       sk->sk_rcvbuf = max_t(int, val * 2, SOCK_MIN_RCVBUF);
+                       WRITE_ONCE(sk->sk_rcvbuf,
+                                  max_t(int, val * 2, SOCK_MIN_RCVBUF));
                        break;
                case SO_SNDBUF:
                        val = min_t(u32, val, sysctl_wmem_max);
                        sk->sk_userlocks |= SOCK_SNDBUF_LOCK;
-                       sk->sk_sndbuf = max_t(int, val * 2, SOCK_MIN_SNDBUF);
+                       WRITE_ONCE(sk->sk_sndbuf,
+                                  max_t(int, val * 2, SOCK_MIN_SNDBUF));
                        break;
                case SO_MAX_PACING_RATE: /* 32bit version */
                        if (val != ~0U)
@@ -4274,7 +4276,7 @@ BPF_CALL_5(bpf_setsockopt, struct bpf_sock_ops_kern *, bpf_sock,
                case SO_RCVLOWAT:
                        if (val < 0)
                                val = INT_MAX;
-                       sk->sk_rcvlowat = val ? : 1;
+                       WRITE_ONCE(sk->sk_rcvlowat, val ? : 1);
                        break;
                case SO_MARK:
                        if (sk->sk_mark != val) {