linux-kernel - Re: [PATCH linux-next] fbdev: omap: use strscpy() to instead of strncpy()

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Date:   Wed, 28 Dec 2022 08:58:25 +0100
From:   Helge Deller <deller@....de>
To:     yang.yang29@....com.cn
Cc:     tony@...mide.com, b.zolnierkie@...sung.com, arnd@...db.de,
        yuzhe@...china.com, jiapeng.chong@...ux.alibaba.com,
        guozhengkui@...o.com, linux-fbdev@...r.kernel.org,
        linux-omap@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, xu.panda@....com.cn
Subject: Re: [PATCH linux-next] fbdev: omap: use strscpy() to instead of
 strncpy()

On 12/28/22 02:40, 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>
> ---
>   drivers/video/fbdev/omap/omapfb_main.c | 5 ++---
>   1 file changed, 2 insertions(+), 3 deletions(-)

applied.
Thanks!
Helge

>
> diff --git a/drivers/video/fbdev/omap/omapfb_main.c b/drivers/video/fbdev/omap/omapfb_main.c
> index 17cda5765683..1f3df2055ff0 100644
> --- a/drivers/video/fbdev/omap/omapfb_main.c
> +++ b/drivers/video/fbdev/omap/omapfb_main.c
> @@ -1447,7 +1447,7 @@ static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
>   	info->fbops = &omapfb_ops;
>   	info->flags = FBINFO_FLAG_DEFAULT;
>
> -	strncpy(fix->id, MODULE_NAME, sizeof(fix->id));
> +	strscpy(fix->id, MODULE_NAME, sizeof(fix->id));
>
>   	info->pseudo_palette = fbdev->pseudo_palette;
>
> @@ -1573,8 +1573,7 @@ static int omapfb_find_ctrl(struct omapfb_device *fbdev)
>
>   	fbdev->ctrl = NULL;
>
> -	strncpy(name, conf->lcd.ctrl_name, sizeof(name) - 1);
> -	name[sizeof(name) - 1] = '\0';
> +	strscpy(name, conf->lcd.ctrl_name, sizeof(name));
>
>   	if (strcmp(name, "internal") == 0) {
>   		fbdev->ctrl = fbdev->int_ctrl;