linux-kernel - [PATCH linux-next] drm/nouveau/nvkm/core/firmware: replace strncpy() with strscpy()

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Date:   Wed, 7 Dec 2022 09:11:08 +0800 (CST)
From:   <yang.yang29@....com.cn>
To:     <bskeggs@...hat.com>
Cc:     <kherbst@...hat.com>, <lyude@...hat.com>, <airlied@...il.com>,
        <daniel@...ll.ch>, <dri-devel@...ts.freedesktop.org>,
        <nouveau@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        <xu.panda@....com.cn>, <yang.yang29@....com.cn>
Subject: [PATCH linux-next] drm/nouveau/nvkm/core/firmware: replace strncpy() with
 strscpy()

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/gpu/drm/nouveau/nvkm/core/firmware.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/core/firmware.c b/drivers/gpu/drm/nouveau/nvkm/core/firmware.c
index fcf2a002f6cb..5554f907e0d4 100644
--- a/drivers/gpu/drm/nouveau/nvkm/core/firmware.c
+++ b/drivers/gpu/drm/nouveau/nvkm/core/firmware.c
@@ -79,8 +79,7 @@ nvkm_firmware_get(const struct nvkm_subdev *subdev, const char *fwname, int ver,
 	int i;

 	/* Convert device name to lowercase */
-	strncpy(cname, device->chip->name, sizeof(cname));
-	cname[sizeof(cname) - 1] = '\0';
+	strscpy(cname, device->chip->name, sizeof(cname));
 	i = strlen(cname);
 	while (i) {
 		--i;
-- 
2.15.2