linux-kernel - Re: [PATCH] sysfs: fix off-by-one error in fill_read

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Date:	Tue, 13 Nov 2007 13:43:29 +0900
From:	Tejun Heo <teheo@...e.de>
To:	miaox@...fujitsu.com
Cc:	gregkh@...e.de, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sysfs: fix  off-by-one error in fill_read_buffer

Miao Xie wrote:
> on 2007-11-12 22:08 Tejun Heo wrote:
>> It isn't strictly a bug.  If the ->show() op fills full PAGE_SIZE and
>> returns PAGE_SIZE, the user will get full PAGE_SIZE bytes correctly, so
>> it will work.  However, considering normal use cases, return value of
>> PAGE_SIZE very likely indicates an error condition, so considering it a
>> BUG condition is a good idea.
>>
>> Miao, can you please note that the code works fine with PAGE_SIZE return
>> but it's likely to indicate truncated result or overflow in normal use
>> cases as a comment on top of the BUG_ON()?
>>
>> Thanks.
> 
> OK, I did it.
> 
> Signed-off-by: Miao Xie <miaox@...fujitsu.com>

Acked-by: Tejun Heo <htejun@...il.com>

Greg, can you please push this one?  Thanks.

-- 
tejun
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