From 6df7376e9ef5ae86d77168d8c10cd8b7fb0945c7 Mon Sep 17 00:00:00 2001
From: christos <christos@NetBSD.org>
Date: Wed, 28 May 2014 14:55:16 +0000
Subject: [PATCH] CID 976378: Avoid incorrect computation with ngrps == 0

---
 sys/sys/socket.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sys/sys/socket.h b/sys/sys/socket.h
index 57aabc977085..f6507f8b2f30 100644
--- a/sys/sys/socket.h
+++ b/sys/sys/socket.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: socket.h,v 1.109 2014/04/17 16:14:22 christos Exp $	*/
+/*	$NetBSD: socket.h,v 1.110 2014/05/28 14:55:16 christos Exp $	*/
 
 /*
  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
@@ -341,7 +341,8 @@ struct sockcred {
  * Compute size of a sockcred structure with groups.
  */
 #define	SOCKCREDSIZE(ngrps) \
-	(sizeof(struct sockcred) + (sizeof(gid_t) * ((ngrps) - 1)))
+	(sizeof(struct sockcred) + (sizeof(gid_t) * \
+	    ((ngrps) ? ((ngrps) - 1) : 0)))
 #endif /* _NETBSD_SOURCE */