From dd3f00cbaf11542cacc58ea873ca1adc7c5da2cc Mon Sep 17 00:00:00 2001
From: "Pedro F. Giffuni" <pfg@FreeBSD.org>
Date: Wed, 4 May 2016 22:27:22 +0000
Subject: [PATCH] fsck_msdosfs: Adjust a check.

The on-disk FAT array does not include anything before CLUST_FIRST,
compensate in size check.

Obtained from:	NetBSD (CVS Rev. 1.20)
MFC after:	2 weeks
---
 sbin/fsck_msdosfs/boot.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sbin/fsck_msdosfs/boot.c b/sbin/fsck_msdosfs/boot.c
index b1760c5c02d..667af93a86e 100644
--- a/sbin/fsck_msdosfs/boot.c
+++ b/sbin/fsck_msdosfs/boot.c
@@ -221,7 +221,7 @@ readboot(int dosfs, struct bootblock *boot)
 		break;
 	}
 
-	if (boot->NumFatEntries < boot->NumClusters) {
+	if (boot->NumFatEntries < boot->NumClusters - CLUST_FIRST) {
 		pfatal("FAT size too small, %u entries won't fit into %u sectors\n",
 		       boot->NumClusters, boot->FATsecs);
 		return FSFATAL;