From: Ben Gras <ben@minix3.org>
Date: Sat, 24 Jul 2010 10:40:55 +0000 (+0000)
Subject: lib - sanity check for group_from_gid etc.
X-Git-Tag: v3.1.8~145
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/man.host.html?a=commitdiff_plain;h=9f0364df60acf729c44c04ddc1b7ddc795cefb1b;p=minix.git

lib - sanity check for group_from_gid etc.
---

diff --git a/lib/libc/other/pwcache.c b/lib/libc/other/pwcache.c
index bf3f366d9..0505e46c4 100644
--- a/lib/libc/other/pwcache.c
+++ b/lib/libc/other/pwcache.c
@@ -271,7 +271,8 @@ user_from_uid(uid_t uid, int noname)
 
 	if ((uidtb == NULL) && (uidtb_start() < 0))
 		return (NULL);
-
+	if (uid < 0)
+		return NULL;
 	/*
 	 * see if we have this uid cached
 	 */
@@ -342,6 +343,8 @@ group_from_gid(gid_t gid, int noname)
 
 	if ((gidtb == NULL) && (gidtb_start() < 0))
 		return (NULL);
+	if (gid < 0)
+		return NULL;
 
 	/*
 	 * see if we have this gid cached