From a506aedc51093544ff0f9610af6066d18cb6abbe Mon Sep 17 00:00:00 2001
From: "wzt.wzt@gmail.com" <wzt.wzt@gmail.com>
Date: Fri, 2 Apr 2010 08:41:14 +0200
Subject: [PATCH] Block: Fix block/elevator.c elevator_get() off-by-one error

elevator_get() not check the name length, if the name length > sizeof(elv),
elv will miss the '\0'. And elv buffer will be replace "-iosched" as something
like aaaaaaaaa, then call request_module() can load an not trust module.

Signed-off-by: Zhitong Wang <zhitong.wangzt@alibaba-inc.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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