Re: [PATCH] xfs: fix potential memory leak in mount option parsing

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> 
> 在 2018年2月25日,上午1:58,Eric Sandeen <sandeen@xxxxxxxxxxx> 写道:
> 
> On 2/24/18 4:33 AM, Chengguang Xu wrote:
>> When specifying string type mount option (e.g., logdev)
>> several times in a mount, current option parsing may
>> cause memory leak. Hence, call kfree for previous one
>> in this case.
>> 
>> Signed-off-by: Chengguang Xu <cgxu519@xxxxxxxxxx>
> 
> IMHO multiple specifications of logdev or rtdev should not
> be allowed; only one may be chosen, and specifying twice
> should probably be considered and administrative error.
> 
> I'd rather see something that fails and cleans up properly
> if either option is respecified.

Hi Eric,

Thanks for quick reply. I think your suggestion makes sense,
but considering of the consistency with other options, 
we should check multiple specifications for all options. 

So I think this patch is the cheapest way to fix the issue.
What do you think?


Thanks,
Chengguang.--
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