linux-kernel - [PATCH 3/6] ext2 balloc: fix off-by-one against rsv

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Message-ID: <Pine.LNX.4.64.0611281740560.29701@blonde.wat.veritas.com>
Date:	Tue, 28 Nov 2006 17:41:39 +0000 (GMT)
From:	Hugh Dickins <hugh@...itas.com>
To:	Mingming Cao <cmm@...ibm.com>
cc:	Andrew Morton <akpm@...l.org>, Mel Gorman <mel@...net.ie>,
	"Martin J. Bligh" <mbligh@...igh.org>,
	linux-kernel@...r.kernel.org,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: [PATCH 3/6] ext2 balloc: fix off-by-one against rsv_end

rsv_end is the last block within the reservation,
so alloc_new_reservation should accept start_block == rsv_end as success.

Signed-off-by: Hugh Dickins <hugh@...itas.com>
---

 fs/ext2/balloc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 2.6.19-rc6-mm2/fs/ext2/balloc.c	2006-11-24 08:18:02.000000000 +0000
+++ linux/fs/ext2/balloc.c	2006-11-27 19:28:41.000000000 +0000
@@ -950,7 +950,7 @@ retry:
 	 * check if the first free block is within the
 	 * free space we just reserved
 	 */
-	if (start_block >= my_rsv->rsv_start && start_block < my_rsv->rsv_end)
+	if (start_block >= my_rsv->rsv_start && start_block <= my_rsv->rsv_end)
 		return 0;		/* success */
 	/*
 	 * if the first free bit we found is out of the reservable space
-
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