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/common/b2c2/flexcop-i2c.c

@@ -226,12 +226,12 @@ int flexcop_i2c_init(struct flexcop_device *fc)
 	fc->fc_i2c_adap[1].port = FC_I2C_PORT_EEPROM;
 	fc->fc_i2c_adap[2].port = FC_I2C_PORT_TUNER;
 
-	strlcpy(fc->fc_i2c_adap[0].i2c_adap.name, "B2C2 FlexCop I2C to demod",
-			sizeof(fc->fc_i2c_adap[0].i2c_adap.name));
-	strlcpy(fc->fc_i2c_adap[1].i2c_adap.name, "B2C2 FlexCop I2C to eeprom",
-			sizeof(fc->fc_i2c_adap[1].i2c_adap.name));
-	strlcpy(fc->fc_i2c_adap[2].i2c_adap.name, "B2C2 FlexCop I2C to tuner",
-			sizeof(fc->fc_i2c_adap[2].i2c_adap.name));
+	strscpy(fc->fc_i2c_adap[0].i2c_adap.name, "B2C2 FlexCop I2C to demod",
+		sizeof(fc->fc_i2c_adap[0].i2c_adap.name));
+	strscpy(fc->fc_i2c_adap[1].i2c_adap.name, "B2C2 FlexCop I2C to eeprom",
+		sizeof(fc->fc_i2c_adap[1].i2c_adap.name));
+	strscpy(fc->fc_i2c_adap[2].i2c_adap.name, "B2C2 FlexCop I2C to tuner",
+		sizeof(fc->fc_i2c_adap[2].i2c_adap.name));
 
 	i2c_set_adapdata(&fc->fc_i2c_adap[0].i2c_adap, &fc->fc_i2c_adap[0]);
 	i2c_set_adapdata(&fc->fc_i2c_adap[1].i2c_adap, &fc->fc_i2c_adap[1]);

drivers/media/common/cx2341x.c

@@ -569,7 +569,7 @@ static int cx2341x_ctrl_query_fill(struct v4l2_queryctrl *qctrl,
 		qctrl->step = step;
 		qctrl->default_value = def;
 		qctrl->reserved[0] = qctrl->reserved[1] = 0;
-		strlcpy(qctrl->name, name, sizeof(qctrl->name));
+		strscpy(qctrl->name, name, sizeof(qctrl->name));
 		return 0;
 
 	default:

drivers/media/common/saa7146/saa7146_fops.c

@@ -606,7 +606,7 @@ int saa7146_register_device(struct video_device *vfd, struct saa7146_dev *dev,
 	vfd->tvnorms = 0;
 	for (i = 0; i < dev->ext_vv_data->num_stds; i++)
 		vfd->tvnorms |= dev->ext_vv_data->stds[i].id;
-	strlcpy(vfd->name, name, sizeof(vfd->name));
+	strscpy(vfd->name, name, sizeof(vfd->name));
 	video_set_drvdata(vfd, dev);
 
 	err = video_register_device(vfd, type, -1);

drivers/media/common/saa7146/saa7146_video.c

@@ -452,7 +452,7 @@ static int vidioc_querycap(struct file *file, void *fh, struct v4l2_capability *
 	struct saa7146_dev *dev = ((struct saa7146_fh *)fh)->dev;
 
 	strcpy((char *)cap->driver, "saa7146 v4l2");
-	strlcpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
+	strscpy((char *)cap->card, dev->ext->name, sizeof(cap->card));
 	sprintf((char *)cap->bus_info, "PCI:%s", pci_name(dev->pci));
 	cap->device_caps =
 		V4L2_CAP_VIDEO_CAPTURE |
@@ -525,8 +525,8 @@ static int vidioc_enum_fmt_vid_cap(struct file *file, void *fh, struct v4l2_fmtd
 {
 	if (f->index >= ARRAY_SIZE(formats))
 		return -EINVAL;
-	strlcpy((char *)f->description, formats[f->index].name,
-			sizeof(f->description));
+	strscpy((char *)f->description, formats[f->index].name,
+		sizeof(f->description));
 	f->pixelformat = formats[f->index].pixelformat;
 	return 0;
 }

drivers/media/common/siano/smscoreapi.c

@@ -450,7 +450,7 @@ static struct smscore_registry_entry_t *smscore_find_registry(char *devpath)
 	entry = kmalloc(sizeof(*entry), GFP_KERNEL);
 	if (entry) {
 		entry->mode = default_mode;
-		strlcpy(entry->devpath, devpath, sizeof(entry->devpath));
+		strscpy(entry->devpath, devpath, sizeof(entry->devpath));
 		list_add(&entry->entry, &g_smscore_registry);
 	} else
 		pr_err("failed to create smscore_registry.\n");
@@ -735,7 +735,7 @@ int smscore_register_device(struct smsdevice_params_t *params,
 	dev->postload_handler = params->postload_handler;
 
 	dev->device_flags = params->flags;
-	strlcpy(dev->devpath, params->devpath, sizeof(dev->devpath));
+	strscpy(dev->devpath, params->devpath, sizeof(dev->devpath));
 
 	smscore_registry_settype(dev->devpath, params->device_type);
 

drivers/media/common/siano/smsir.c

@@ -55,7 +55,7 @@ int sms_ir_init(struct smscore_device_t *coredev)
 	snprintf(coredev->ir.name, sizeof(coredev->ir.name),
 		 "SMS IR (%s)", sms_get_board(board_id)->name);
 
-	strlcpy(coredev->ir.phys, coredev->devpath, sizeof(coredev->ir.phys));
+	strscpy(coredev->ir.phys, coredev->devpath, sizeof(coredev->ir.phys));
 	strlcat(coredev->ir.phys, "/ir0", sizeof(coredev->ir.phys));
 
 	dev->device_name = coredev->ir.name;