Re: [PATCH net-next] hinic: fix strncpy output truncated compile warnings

[luobin (L)]

On 2020/8/7 3:01, David Miller wrote:
> From: Luo bin <luobin9@xxxxxxxxxx>
> Date: Thu, 6 Aug 2020 15:48:30 +0800
> 
>> diff --git a/drivers/net/ethernet/huawei/hinic/hinic_devlink.c b/drivers/net/ethernet/huawei/hinic/hinic_devlink.c
>> index c6adc776f3c8..1dc948c07b94 100644
>> --- a/drivers/net/ethernet/huawei/hinic/hinic_devlink.c
>> +++ b/drivers/net/ethernet/huawei/hinic/hinic_devlink.c
>> @@ -342,9 +342,9 @@ static int chip_fault_show(struct devlink_fmsg *fmsg,
>>  
>>  	level = event->event.chip.err_level;
>>  	if (level < FAULT_LEVEL_MAX)
>> -		strncpy(level_str, fault_level[level], strlen(fault_level[level]));
>> +		strncpy(level_str, fault_level[level], strlen(fault_level[level]) + 1);
>>  	else
>> -		strncpy(level_str, "Unknown", strlen("Unknown"));
>> +		strncpy(level_str, "Unknown", sizeof(level_str));
>>  
>>  	if (level == FAULT_LEVEL_SERIOUS_FLR) {
> 
> Please fix these cases consistently, either use the strlen()+1 pattern
> or the "sizeof(destination)" one.
> 
> Probably sizeof(destination) is best.
> .
> 
Will fix. Thanks. Level_str array is initialized to zero, so can't use the strlen()+1 pattern, I'll
use strlen()+1 consistently.