linux-kernel - Re: [PATCH RE-SEND v1] PM / devfreq: Replace strncpy with strscpy

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Date:   Thu, 7 May 2020 04:00:22 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Chanwoo Choi <cw00.choi@...sung.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RE-SEND v1] PM / devfreq: Replace strncpy with strscpy

07.05.2020 03:02, Chanwoo Choi пишет:
> Hi Dmitry,
> 
> On 4/17/20 11:04 PM, Dmitry Osipenko wrote:
>> 27.02.2020 20:08, Dmitry Osipenko пишет:
>>> GCC produces this warning when kernel compiled using `make W=1`:
>>>
>>>   warning: ‘strncpy’ specified bound 16 equals destination size [-Wstringop-truncation]
>>>   772 |  strncpy(devfreq->governor_name, governor_name, DEVFREQ_NAME_LEN);
>>>
>>> The strncpy doesn't take care of NULL-termination of the destination
>>> buffer, while the strscpy does.
>>>
>>> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
>>> ---
>>>  drivers/devfreq/devfreq.c | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
>>> index 8494c5f05a73..2011f64bfa3a 100644
>>> --- a/drivers/devfreq/devfreq.c
>>> +++ b/drivers/devfreq/devfreq.c
>>> @@ -769,7 +769,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
>>>  	devfreq->dev.release = devfreq_dev_release;
>>>  	INIT_LIST_HEAD(&devfreq->node);
>>>  	devfreq->profile = profile;
>>> -	strncpy(devfreq->governor_name, governor_name, DEVFREQ_NAME_LEN);
>>> +	strscpy(devfreq->governor_name, governor_name, DEVFREQ_NAME_LEN);
>>>  	devfreq->previous_freq = profile->initial_freq;
>>>  	devfreq->last_status.current_frequency = profile->initial_freq;
>>>  	devfreq->data = data;
>>>
>>
>> Hello Chanwoo,
>>
>> Do you have any objections to this patch?
>>
> 
> I'm sorry for late reply. I applied it for v5.8-rc1.
> Thanks.

No problems, thank you :)