1 files changed, 2 insertions, 0 deletions

diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index a7ef679dd3ea..3a4d9b34bed4 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -4845,6 +4845,8 @@ static void tcp_check_space(struct sock *sk)
 {
         if (sock_flag(sk, SOCK_QUEUE_SHRUNK)) {
                 sock_reset_flag(sk, SOCK_QUEUE_SHRUNK);
+                /* pairs with tcp_poll() */
+                smp_mb__after_atomic();
                 if (sk->sk_socket &&
                     test_bit(SOCK_NOSPACE, &sk->sk_socket->flags))
                         tcp_new_space(sk);