--- linux-4.9.37/net/ipv4/tcp.c	2017-07-12 16:42:41.000000000 +0300
+++ linux-4.9.y/net/ipv4/tcp.c	2021-06-07 13:01:34.000000000 +0300
@@ -3289,6 +3289,7 @@
 	unsigned long limit;
 	unsigned int i;
 
+	BUILD_BUG_ON(TCP_MIN_SND_MSS <= MAX_TCP_OPTION_SPACE);
 	BUILD_BUG_ON(sizeof(struct tcp_skb_cb) >
 		     FIELD_SIZEOF(struct sk_buff, cb));