netdev - Re: [PATCH net] net: ehea: fix possible memory leak in ehea_register

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Message-ID: <207fa9fb-2ea5-fa0e-ab56-22d535749132@huawei.com>
Date:   Tue, 25 Oct 2022 20:16:08 +0800
From:   Yang Yingliang <yangyingliang@...wei.com>
To:     Paolo Abeni <pabeni@...hat.com>, <netdev@...r.kernel.org>
CC:     <dougmill@...ux.ibm.com>, <davem@...emloft.net>, <kuba@...nel.org>
Subject: Re: [PATCH net] net: ehea: fix possible memory leak in
 ehea_register_port()

Hi,

On 2022/10/25 19:55, Paolo Abeni wrote:
> Hello,
>
> On Sat, 2022-10-22 at 19:37 +0800, Yang Yingliang wrote:
>> dev_set_name() in ehea_register_port() allocates memory for name,
>> it need be freed when of_device_register() fails, call put_device()
>> to give up the reference that hold in device_initialize(), so that
>> it can be freed in kobject_cleanup() when the refcount hit to 0.
>>
>> Signed-off-by: Yang Yingliang <yangyingliang@...wei.com>
>> ---
>>   drivers/net/ethernet/ibm/ehea/ehea_main.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
>> index 294bdbbeacc3..b4aff59b3eb4 100644
>> --- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
>> +++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
>> @@ -2900,6 +2900,7 @@ static struct device *ehea_register_port(struct ehea_port *port,
>>   	ret = of_device_register(&port->ofdev);
>>   	if (ret) {
>>   		pr_err("failed to register device. ret=%d\n", ret);
>> +		put_device(&port->ofdev.dev);
>>   		goto out;
>>   	}
> You need to include a suitable Fixes tag into the commit message.
> Additionally, if you have a kmemleak splat handy, please include even
> that in the commit message.
Fixes: 1fa5ae857bb1 ("driver core: get rid of struct device's bus_id 
string array")

Afer commit 1fa5ae857bb1 ("driver core: get rid of struct device's
bus_id string array"), the name of device is allocated dynamically.

>
> Thanks!
>
> Paolo
>
>
> .