linux-kernel - Re: [PATCH -next] mtd: docg3: Fix a possible memory leak of mtd->name

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Message-ID: <ba7a5252-893c-6fb5-84b4-1ab482738afd@huawei.com>
Date:   Wed, 23 Jan 2019 16:54:04 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     Boris Brezillon <bbrezillon@...nel.org>
CC:     <robert.jarzmik@...e.fr>, <dwmw2@...radead.org>,
        <computersforpeace@...il.com>, <marek.vasut@...il.com>,
        <richard@....at>, <linux-kernel@...r.kernel.org>,
        <linux-mtd@...ts.infradead.org>
Subject: Re: [PATCH -next] mtd: docg3: Fix a possible memory leak of mtd->name

On 2019/1/23 16:46, Boris Brezillon wrote:
> On Wed, 23 Jan 2019 14:59:43 +0800
> YueHaibing <yuehaibing@...wei.com> wrote:
> 
>> In case DOC_CHIPID_G3, mtd->name should be freed in the
>> err handling path, which is alloced by kasprintf.
>>
>> Fixes: ae9d4934b2d7 ("mtd: docg3: add multiple floor support")
>> Signed-off-by: YueHaibing <yuehaibing@...wei.com>
>> ---
>>  drivers/mtd/devices/docg3.c | 1 +
>>  1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/mtd/devices/docg3.c b/drivers/mtd/devices/docg3.c
>> index 60ddc38..cbd25f9 100644
>> --- a/drivers/mtd/devices/docg3.c
>> +++ b/drivers/mtd/devices/docg3.c
>> @@ -1867,6 +1867,7 @@ doc_probe_device(struct docg3_cascade *cascade, int floor, struct device *dev)
>>  
>>  nomem4:
>>  	kfree(docg3->bbt);
>> +	kfree(mtd->name);
> 
> Please use devm_kasprintf() instead.

Ok, will do it in v2.

> 
>>  nomem3:
>>  	kfree(mtd);
>>  nomem2:
> 
> 
> .
>