net: Fix data-races around sysctl_[rw]mem_(max|default).

[people/ms/linux.git] / net / ipv4 / ip_output.c

diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index d7bd1daf022b5a6a2c025e83346d347714f672c8..04e2034f2f8eda79c1b0a9b67c8dba09bca34dba 100644 (file)
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -1730,7 +1730,7 @@ void ip_send_unicast_reply(struct sock *sk, struct sk_buff *skb,
 
        sk->sk_protocol = ip_hdr(skb)->protocol;
        sk->sk_bound_dev_if = arg->bound_dev_if;
-       sk->sk_sndbuf = sysctl_wmem_default;
+       sk->sk_sndbuf = READ_ONCE(sysctl_wmem_default);
        ipc.sockc.mark = fl4.flowi4_mark;
        err = ip_append_data(sk, &fl4, ip_reply_glue_bits, arg->iov->iov_base,
                             len, 0, &ipc, &rt, MSG_DONTWAIT);