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Date:      Tue, 3 Jul 2001 16:24:36 +0800
From:      "Jiangyi Liu" <gzjyliu@public.guangzhou.gd.cn>
To:        <freebsd-fs@FreeBSD.org>
Subject:   [PATCH]FSInfo Validation in mountmsdosfs()
Message-ID:  <003901c10399$9aa3cbf0$a701160a@fatcow>
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[-- Attachment #1 --]


[-- Attachment #2 --]
*** msdosfs_vfsops.c.orig	Sat Jun 30 14:21:15 2001
--- msdosfs_vfsops.c	Sat Jun 30 14:30:25 2001
***************
*** 681,686 ****
--- 681,692 ----
  	/*
  	 * Check and validate (or perhaps invalidate?) the fsinfo structure?		XXX
  	 */
+     if (pmp->pm_fsinfo && pmp->pm_nxtfree > pmp->pm_maxcluster) {
+         printf ("Next free cluster in FSInfo (%u) exceeds maxcluster (%u)\n",
+                pmp->pm_nxtfree, pmp->pm_maxcluster);
+         error = EINVAL;
+         goto error_exit;
+     }
  
  	/*
  	 * Allocate memory for the bitmap of allocated clusters, and then

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