linux-kernel - Re: [PATCH v2 1/4] libnvdimm: fix memmory leaks in of

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Date:   Wed, 19 Aug 2020 22:19:36 +0800
From:   "Leizhen (ThunderTown)" <thunder.leizhen@...wei.com>
To:     Oliver O'Halloran <oohall@...il.com>
CC:     Dan Williams <dan.j.williams@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Markus Elfring <Markus.Elfring@....de>,
        linux-nvdimm <linux-nvdimm@...ts.01.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/4] libnvdimm: fix memmory leaks in of_pmem.c



On 8/19/2020 9:37 PM, Oliver O'Halloran wrote:
> On Wed, Aug 19, 2020 at 12:05 PM Zhen Lei <thunder.leizhen@...wei.com> wrote:
>>
>> The memory priv->bus_desc.provider_name allocated by kstrdup() is not
>> freed correctly.
>>
>> Fixes: 49bddc73d15c ("libnvdimm/of_pmem: Provide a unique name for bus provider")
>> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
> 
> Yep, that's a bug.
> 
> Reviewed-by: Oliver O'Halloran <oohall@...il.com>

Thanks for your review.

> 
>> ---
>>  drivers/nvdimm/of_pmem.c | 2 ++
>>  1 file changed, 2 insertions(+)
>>
>> diff --git a/drivers/nvdimm/of_pmem.c b/drivers/nvdimm/of_pmem.c
>> index 10dbdcdfb9ce913..1292ffca7b2ecc0 100644
>> --- a/drivers/nvdimm/of_pmem.c
>> +++ b/drivers/nvdimm/of_pmem.c
>> @@ -36,6 +36,7 @@ static int of_pmem_region_probe(struct platform_device *pdev)
>>
>>         priv->bus = bus = nvdimm_bus_register(&pdev->dev, &priv->bus_desc);
>>         if (!bus) {
>> +               kfree(priv->bus_desc.provider_name);
>>                 kfree(priv);
>>                 return -ENODEV;
>>         }
>> @@ -83,6 +84,7 @@ static int of_pmem_region_remove(struct platform_device *pdev)
>>         struct of_pmem_private *priv = platform_get_drvdata(pdev);
>>
>>         nvdimm_bus_unregister(priv->bus);
>> +       kfree(priv->bus_desc.provider_name);
>>         kfree(priv);
>>
>>         return 0;
>> --
>> 1.8.3
>>
>>
> 
> .
>