diff -drupN a/net/ipv4/syncookies.c b/net/ipv4/syncookies.c
--- a/net/ipv4/syncookies.c	2018-08-06 17:23:04.000000000 +0300
+++ b/net/ipv4/syncookies.c	2022-06-12 05:28:14.000000000 +0300
@@ -373,7 +373,7 @@ struct sock *cookie_v4_check(struct sock
 			   RT_CONN_FLAGS(sk), RT_SCOPE_UNIVERSE, IPPROTO_TCP,
 			   inet_sk_flowi_flags(sk),
 			   opt->srr ? opt->faddr : ireq->ir_rmt_addr,
-			   ireq->ir_loc_addr, th->source, th->dest);
+			   ireq->ir_loc_addr, th->source, th->dest, sk->sk_uid);
 	security_req_classify_flow(req, flowi4_to_flowi(&fl4));
 	rt = ip_route_output_key(sock_net(sk), &fl4);
 	if (IS_ERR(rt)) {