From e4679b3dbb9b286ac36e9b46d146bf79213226c3 Mon Sep 17 00:00:00 2001
From: stas <stas@FreeBSD.org>
Date: Fri, 8 Jan 2016 00:46:28 +0000
Subject: [PATCH] MFC r277938 (by hiren): make syncookie_mac() use 'tcp_seq
 irs' in computing hash.

---
 sys/netinet/tcp_syncache.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sys/netinet/tcp_syncache.c b/sys/netinet/tcp_syncache.c
index 8d2cc984617a..fe2eb0b24ae4 100644
--- a/sys/netinet/tcp_syncache.c
+++ b/sys/netinet/tcp_syncache.c
@@ -1852,6 +1852,7 @@ syncookie_mac(struct in_conninfo *inc, tcp_seq irs, uint8_t flags,
 	}
 	SipHash_Update(&ctx, &inc->inc_fport, sizeof(inc->inc_fport));
 	SipHash_Update(&ctx, &inc->inc_lport, sizeof(inc->inc_lport));
+	SipHash_Update(&ctx, &irs, sizeof(irs));
 	SipHash_Update(&ctx, &flags, sizeof(flags));
 	SipHash_Update(&ctx, &secmod, sizeof(secmod));
 	SipHash_Final((u_int8_t *)&siphash, &ctx);