media: use strscpy() instead of strlcpy()

The implementation of strscpy() is more robust and safer.

That's now the recommended way to copy NUL terminated strings.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/s3c-camif/camif-capture.c

@@ -640,8 +640,8 @@ static int s3c_camif_vidioc_querycap(struct file *file, void *priv,
 {
 	struct camif_vp *vp = video_drvdata(file);
 
-	strlcpy(cap->driver, S3C_CAMIF_DRIVER_NAME, sizeof(cap->driver));
-	strlcpy(cap->card, S3C_CAMIF_DRIVER_NAME, sizeof(cap->card));
+	strscpy(cap->driver, S3C_CAMIF_DRIVER_NAME, sizeof(cap->driver));
+	strscpy(cap->card, S3C_CAMIF_DRIVER_NAME, sizeof(cap->card));
 	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s.%d",
 		 dev_name(vp->camif->dev), vp->id);
 
@@ -661,7 +661,7 @@ static int s3c_camif_vidioc_enum_input(struct file *file, void *priv,
 		return -EINVAL;
 
 	input->type = V4L2_INPUT_TYPE_CAMERA;
-	strlcpy(input->name, sensor->name, sizeof(input->name));
+	strscpy(input->name, sensor->name, sizeof(input->name));
 	return 0;
 }
 
@@ -688,7 +688,7 @@ static int s3c_camif_vidioc_enum_fmt(struct file *file, void *priv,
 	if (!fmt)
 		return -EINVAL;
 
-	strlcpy(f->description, fmt->name, sizeof(f->description));
+	strscpy(f->description, fmt->name, sizeof(f->description));
 	f->pixelformat = fmt->fourcc;
 
 	pr_debug("fmt(%d): %s\n", f->index, f->description);
@@ -1555,7 +1555,7 @@ int s3c_camif_create_subdev(struct camif_dev *camif)
 
 	v4l2_subdev_init(sd, &s3c_camif_subdev_ops);
 	sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
-	strlcpy(sd->name, "S3C-CAMIF", sizeof(sd->name));
+	strscpy(sd->name, "S3C-CAMIF", sizeof(sd->name));
 
 	camif->pads[CAMIF_SD_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
 	camif->pads[CAMIF_SD_PAD_SOURCE_C].flags = MEDIA_PAD_FL_SOURCE;

drivers/media/platform/s3c-camif/camif-core.c

@@ -316,12 +316,12 @@ static int camif_media_dev_init(struct camif_dev *camif)
 	memset(md, 0, sizeof(*md));
 	snprintf(md->model, sizeof(md->model), "SAMSUNG S3C%s CAMIF",
 		 ip_rev == S3C6410_CAMIF_IP_REV ? "6410" : "244X");
-	strlcpy(md->bus_info, "platform", sizeof(md->bus_info));
+	strscpy(md->bus_info, "platform", sizeof(md->bus_info));
 	md->hw_revision = ip_rev;
 
 	md->dev = camif->dev;
 
-	strlcpy(v4l2_dev->name, "s3c-camif", sizeof(v4l2_dev->name));
+	strscpy(v4l2_dev->name, "s3c-camif", sizeof(v4l2_dev->name));
 	v4l2_dev->mdev = md;
 
 	media_device_init(md);