Index: sys/fs/msdosfs/msdosfs_vfsops.c
===================================================================
RCS file: /home/ncvs/src/sys/fs/msdosfs/msdosfs_vfsops.c,v
retrieving revision 1.91
diff -u -r1.91 msdosfs_vfsops.c
--- sys/fs/msdosfs/msdosfs_vfsops.c	2002/08/13 10:05:46	1.91
+++ sys/fs/msdosfs/msdosfs_vfsops.c	2002/08/14 00:34:43
@@ -543,8 +543,14 @@
 	}
 
 	/*
-	 * Check and validate (or perhaps invalidate?) the fsinfo structure?		XXX
+	 * Check and validate (or perhaps invalidate?) the fsinfo structure?
 	 */
+	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