From 84a8b19d55a789fa90e919f970e259cbfa7786ed Mon Sep 17 00:00:00 2001
From: eadler <eadler@FreeBSD.org>
Date: Thu, 15 Nov 2012 15:06:03 +0000
Subject: Check the range of the gid

Approved by:	cperciva
MFC after:	1 week
---
 usr.sbin/chkgrp/chkgrp.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'usr.sbin/chkgrp')

diff --git a/usr.sbin/chkgrp/chkgrp.c b/usr.sbin/chkgrp/chkgrp.c
index ac40ed5..2dd41a8 100644
--- a/usr.sbin/chkgrp/chkgrp.c
+++ b/usr.sbin/chkgrp/chkgrp.c
@@ -30,7 +30,10 @@
 __FBSDID("$FreeBSD$");
 
 #include <err.h>
+#include <errno.h>
 #include <ctype.h>
+#include <limits.h>
+#include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -150,6 +153,18 @@ main(int argc, char *argv[])
 	    warnx("%s: line %d: GID is not numeric", gfn, n);
 	    e++;
 	}
+
+	/* check the range of the group id */
+	errno = 0;
+	unsigned long groupid = strtoul(f[2], NULL, 10);
+	if (errno != 0) {
+		warnx("%s: line %d: strtoul failed", gfn, n);
+	}
+	else if (groupid > GID_MAX) {
+		warnx("%s: line %d: group id is too large (> %ju)",
+		  gfn, n, (uintmax_t)GID_MAX);
+		e++;
+	}
 	
 #if 0
 	/* entry is correct, so print it */
-- 
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