1 files changed, 13 insertions, 0 deletions

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index da6e24416d75..f2ec38289a4a 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1864,6 +1864,19 @@ static int tcp_v6_init_sock(struct sock *sk)
         tp->af_specific = &tcp_sock_ipv6_specific;
 #endif
 
+        /* TCP Cookie Transactions */
+        if (sysctl_tcp_cookie_size > 0) {
+                /* Default, cookies without s_data_payload. */
+                tp->cookie_values =
+                        kzalloc(sizeof(*tp->cookie_values),
+                                sk->sk_allocation);
+                if (tp->cookie_values != NULL)
+                        kref_init(&tp->cookie_values->kref);
+        }
+        /* Presumed zeroed, in order of appearance:
+         *      cookie_in_always, cookie_out_never,
+         *      s_data_constant, s_data_in, s_data_out
+         */
         sk->sk_sndbuf = sysctl_tcp_wmem[1];
         sk->sk_rcvbuf = sysctl_tcp_rmem[1];