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

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Date:   Wed, 28 Dec 2022 09:40:01 +0800 (CST)
From:   <yang.yang29@....com.cn>
To:     <deller@....de>
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>,
        <yang.yang29@....com.cn>
Subject: [PATCH linux-next] fbdev: omap: use strscpy() to instead of strncpy()

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(-)

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;
-- 
2.15.2