[PATCH] ext4 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: Mingming Cao <[email protected]> Signed-off-by: Hugh Dickins <[email protected]> Cc: <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
mgowda · Dec 7, 2006 · b2f2c76 · b2f2c76
1 parent e7dc95d
commit b2f2c76
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
@@ -1165,7 +1165,7 @@ static int alloc_new_reservation(struct ext4_reserve_window_node *my_rsv,
 	 * 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