do not allow SO_SNDBUF/SO_RCVBUF len 0

diff --git a/sys/kern/uipc_socket2.c b/sys/kern/uipc_socket2.c
index 92ab13d..1641822 100644 (file)
--- 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);