From 2fc743ab6e1985a2d7ec00ab03a6fa1193866c66 Mon Sep 17 00:00:00 2001
From: deraadt <deraadt@openbsd.org>
Date: Fri, 21 Feb 1997 08:45:00 +0000
Subject: [PATCH] do not allow SO_SNDBUF/SO_RCVBUF len 0

---
 sys/kern/uipc_socket2.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/kern/uipc_socket2.c b/sys/kern/uipc_socket2.c
index 92ab13de5e1..1641822b28a 100644
--- a/sys/kern/uipc_socket2.c
+++ b/sys/kern/uipc_socket2.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: uipc_socket2.c,v 1.4 1996/09/20 22:53:10 deraadt Exp $	*/
+/*	$OpenBSD: uipc_socket2.c,v 1.5 1997/02/21 08:45:00 deraadt Exp $	*/
 /*	$NetBSD: uipc_socket2.c,v 1.11 1996/02/04 02:17:55 christos Exp $	*/
 
 /*
@@ -397,7 +397,7 @@ sbreserve(sb, cc)
 	u_long cc;
 {
 
-	if (cc > sb_max * MCLBYTES / (MSIZE + MCLBYTES))
+	if (cc == 0 || cc > sb_max * MCLBYTES / (MSIZE + MCLBYTES))
 		return (0);
 	sb->sb_hiwat = cc;
 	sb->sb_mbmax = min(cc * 2, sb_max);
-- 
2.20.1