netdev - Re: [PATCH net-next v2] hns: use strscpy() to instead of strncpy()

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Date:   Tue, 13 Dec 2022 09:27:20 +0800
From:   Hao Lan <lanhao@...wei.com>
To:     <yang.yang29@....com.cn>, <salil.mehta@...wei.com>
CC:     <yisen.zhuang@...wei.com>, <davem@...emloft.net>,
        <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
        <brianvv@...gle.com>, <netdev@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <xu.panda@....com.cn>
Subject: Re: [PATCH net-next v2] hns: use strscpy() to instead of strncpy()



On 2022/12/9 15:33, yang.yang29@....com.cn wrote:
> From: Xu Panda <xu.panda@....com.cn>
> 
> The implementation of strscpy() is more robust and safer.
> That's now the recommended way to copy NUL terminated strings.
> 
> Signed-off-by: Xu Panda <xu.panda@....com.cn>
> Signed-off-by: Yang Yang <yang.yang29@....com>
> ---
> change for v2
>  - change the prefix and subject: replace ethtool with hns,
> and replace linux-next with net-next.
> ---
>  drivers/net/ethernet/hisilicon/hns/hns_ethtool.c | 11 ++++-------
>  1 file changed, 4 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
> index 54faf0f2d1d8..b54f3706fb97 100644
> --- a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
> +++ b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
> @@ -644,18 +644,15 @@ static void hns_nic_get_drvinfo(struct net_device *net_dev,
>  {
>  	struct hns_nic_priv *priv = netdev_priv(net_dev);
> 
> -	strncpy(drvinfo->version, HNAE_DRIVER_VERSION,
> +	strscpy(drvinfo->version, HNAE_DRIVER_VERSION,
>  		sizeof(drvinfo->version));
> -	drvinfo->version[sizeof(drvinfo->version) - 1] = '\0';
> 
> -	strncpy(drvinfo->driver, HNAE_DRIVER_NAME, sizeof(drvinfo->driver));
> -	drvinfo->driver[sizeof(drvinfo->driver) - 1] = '\0';
> +	strscpy(drvinfo->driver, HNAE_DRIVER_NAME, sizeof(drvinfo->driver));
> 
> -	strncpy(drvinfo->bus_info, priv->dev->bus->name,
> +	strscpy(drvinfo->bus_info, priv->dev->bus->name,
>  		sizeof(drvinfo->bus_info));
> -	drvinfo->bus_info[ETHTOOL_BUSINFO_LEN - 1] = '\0';
> 
> -	strncpy(drvinfo->fw_version, "N/A", ETHTOOL_FWVERS_LEN);
> +	strscpy(drvinfo->fw_version, "N/A", ETHTOOL_FWVERS_LEN);
>  	drvinfo->eedump_len = 0;
>  }
> 
Reviewed-by: Hao Lan <lanhao@...wei.com>