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Message-ID: <Yv64eoZlywNXQ/OB@pendragon.ideasonboard.com>
Date: Fri, 19 Aug 2022 01:08:58 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc: linux-kernel@...r.kernel.org, Duncan Sands <duncan.sands@...e.fr>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Felipe Balbi <balbi@...nel.org>,
Richard Leitner <richard.leitner@...data.com>,
Alan Stern <stern@...land.harvard.edu>,
Guenter Roeck <linux@...ck-us.net>,
Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Valentina Manea <valentina.manea.m@...il.com>,
Shuah Khan <shuah@...nel.org>, linux-usb@...r.kernel.org,
usb-storage@...ts.one-eyed-alien.net
Subject: Re: [PATCH] usb: move from strlcpy with unused retval to strscpy
Hi Wolfram,
Thank you for the patch.
On Thu, Aug 18, 2022 at 11:01:15PM +0200, Wolfram Sang wrote:
> Follow the advice of the below link and prefer 'strscpy' in this
> subsystem. Conversion is 1:1 because the return value is not used.
> Generated by a coccinelle script.
>
> Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
> ---
> drivers/usb/atm/usbatm.c | 2 +-
> drivers/usb/core/devio.c | 2 +-
> drivers/usb/gadget/function/f_fs.c | 2 +-
> drivers/usb/gadget/function/f_uvc.c | 2 +-
> drivers/usb/gadget/function/u_ether.c | 8 ++++----
> drivers/usb/gadget/function/uvc_v4l2.c | 6 +++---
> drivers/usb/gadget/udc/omap_udc.c | 2 +-
> drivers/usb/misc/usb251xb.c | 6 +++---
> drivers/usb/storage/onetouch.c | 2 +-
> drivers/usb/typec/tcpm/fusb302.c | 2 +-
> drivers/usb/usbip/stub_main.c | 2 +-
> 11 files changed, 18 insertions(+), 18 deletions(-)
>
> diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c
> index 362217189ef3..1cdb8758ae01 100644
> --- a/drivers/usb/atm/usbatm.c
> +++ b/drivers/usb/atm/usbatm.c
> @@ -1026,7 +1026,7 @@ int usbatm_usb_probe(struct usb_interface *intf, const struct usb_device_id *id,
> /* public fields */
>
> instance->driver = driver;
> - strlcpy(instance->driver_name, driver->driver_name,
> + strscpy(instance->driver_name, driver->driver_name,
> sizeof(instance->driver_name));
>
> instance->usb_dev = usb_dev;
> diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
> index b5b85bf80329..837f3e57f580 100644
> --- a/drivers/usb/core/devio.c
> +++ b/drivers/usb/core/devio.c
> @@ -1434,7 +1434,7 @@ static int proc_getdriver(struct usb_dev_state *ps, void __user *arg)
> if (!intf || !intf->dev.driver)
> ret = -ENODATA;
> else {
> - strlcpy(gd.driver, intf->dev.driver->name,
> + strscpy(gd.driver, intf->dev.driver->name,
> sizeof(gd.driver));
> ret = (copy_to_user(arg, &gd, sizeof(gd)) ? -EFAULT : 0);
> }
> diff --git a/drivers/usb/gadget/function/f_fs.c b/drivers/usb/gadget/function/f_fs.c
> index e0fa4b186ec6..98dc2291e9a1 100644
> --- a/drivers/usb/gadget/function/f_fs.c
> +++ b/drivers/usb/gadget/function/f_fs.c
> @@ -3700,7 +3700,7 @@ int ffs_name_dev(struct ffs_dev *dev, const char *name)
>
> existing = _ffs_do_find_dev(name);
> if (!existing)
> - strlcpy(dev->name, name, ARRAY_SIZE(dev->name));
> + strscpy(dev->name, name, ARRAY_SIZE(dev->name));
> else if (existing != dev)
> ret = -EBUSY;
>
> diff --git a/drivers/usb/gadget/function/f_uvc.c b/drivers/usb/gadget/function/f_uvc.c
> index 71669e0e4d00..f4f6cf75930b 100644
> --- a/drivers/usb/gadget/function/f_uvc.c
> +++ b/drivers/usb/gadget/function/f_uvc.c
> @@ -430,7 +430,7 @@ uvc_register_video(struct uvc_device *uvc)
> uvc->vdev.vfl_dir = VFL_DIR_TX;
> uvc->vdev.lock = &uvc->video.mutex;
> uvc->vdev.device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
> - strlcpy(uvc->vdev.name, cdev->gadget->name, sizeof(uvc->vdev.name));
> + strscpy(uvc->vdev.name, cdev->gadget->name, sizeof(uvc->vdev.name));
>
> video_set_drvdata(&uvc->vdev, uvc);
>
> diff --git a/drivers/usb/gadget/function/u_ether.c b/drivers/usb/gadget/function/u_ether.c
> index 7887def05dc2..e06022873df1 100644
> --- a/drivers/usb/gadget/function/u_ether.c
> +++ b/drivers/usb/gadget/function/u_ether.c
> @@ -144,10 +144,10 @@ static void eth_get_drvinfo(struct net_device *net, struct ethtool_drvinfo *p)
> {
> struct eth_dev *dev = netdev_priv(net);
>
> - strlcpy(p->driver, "g_ether", sizeof(p->driver));
> - strlcpy(p->version, UETH__VERSION, sizeof(p->version));
> - strlcpy(p->fw_version, dev->gadget->name, sizeof(p->fw_version));
> - strlcpy(p->bus_info, dev_name(&dev->gadget->dev), sizeof(p->bus_info));
> + strscpy(p->driver, "g_ether", sizeof(p->driver));
> + strscpy(p->version, UETH__VERSION, sizeof(p->version));
> + strscpy(p->fw_version, dev->gadget->name, sizeof(p->fw_version));
> + strscpy(p->bus_info, dev_name(&dev->gadget->dev), sizeof(p->bus_info));
> }
>
> /* REVISIT can also support:
> diff --git a/drivers/usb/gadget/function/uvc_v4l2.c b/drivers/usb/gadget/function/uvc_v4l2.c
> index fd8f73bb726d..511f106f9843 100644
> --- a/drivers/usb/gadget/function/uvc_v4l2.c
> +++ b/drivers/usb/gadget/function/uvc_v4l2.c
> @@ -67,9 +67,9 @@ uvc_v4l2_querycap(struct file *file, void *fh, struct v4l2_capability *cap)
> struct uvc_device *uvc = video_get_drvdata(vdev);
> struct usb_composite_dev *cdev = uvc->func.config->cdev;
>
> - strlcpy(cap->driver, "g_uvc", sizeof(cap->driver));
> - strlcpy(cap->card, cdev->gadget->name, sizeof(cap->card));
> - strlcpy(cap->bus_info, dev_name(&cdev->gadget->dev),
> + strscpy(cap->driver, "g_uvc", sizeof(cap->driver));
> + strscpy(cap->card, cdev->gadget->name, sizeof(cap->card));
> + strscpy(cap->bus_info, dev_name(&cdev->gadget->dev),
> sizeof(cap->bus_info));
> return 0;
> }
> diff --git a/drivers/usb/gadget/udc/omap_udc.c b/drivers/usb/gadget/udc/omap_udc.c
> index 61cabb9de6ae..b0567c63d754 100644
> --- a/drivers/usb/gadget/udc/omap_udc.c
> +++ b/drivers/usb/gadget/udc/omap_udc.c
> @@ -2558,7 +2558,7 @@ omap_ep_setup(char *name, u8 addr, u8 type,
>
> /* set up driver data structures */
> BUG_ON(strlen(name) >= sizeof ep->name);
> - strlcpy(ep->name, name, sizeof ep->name);
> + strscpy(ep->name, name, sizeof(ep->name));
> INIT_LIST_HEAD(&ep->queue);
> INIT_LIST_HEAD(&ep->iso);
> ep->bEndpointAddress = addr;
> diff --git a/drivers/usb/misc/usb251xb.c b/drivers/usb/misc/usb251xb.c
> index 04c4e3fed094..87035ac09834 100644
> --- a/drivers/usb/misc/usb251xb.c
> +++ b/drivers/usb/misc/usb251xb.c
> @@ -547,7 +547,7 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
> hub->boost_up = USB251XB_DEF_BOOST_UP;
>
> cproperty_char = of_get_property(np, "manufacturer", NULL);
> - strlcpy(str, cproperty_char ? : USB251XB_DEF_MANUFACTURER_STRING,
> + strscpy(str, cproperty_char ? : USB251XB_DEF_MANUFACTURER_STRING,
> sizeof(str));
> hub->manufacturer_len = strlen(str) & 0xFF;
> memset(hub->manufacturer, 0, USB251XB_STRING_BUFSIZE);
> @@ -557,7 +557,7 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
> USB251XB_STRING_BUFSIZE);
>
> cproperty_char = of_get_property(np, "product", NULL);
> - strlcpy(str, cproperty_char ? : data->product_str, sizeof(str));
> + strscpy(str, cproperty_char ? : data->product_str, sizeof(str));
> hub->product_len = strlen(str) & 0xFF;
> memset(hub->product, 0, USB251XB_STRING_BUFSIZE);
> len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
> @@ -566,7 +566,7 @@ static int usb251xb_get_ofdata(struct usb251xb *hub,
> USB251XB_STRING_BUFSIZE);
>
> cproperty_char = of_get_property(np, "serial", NULL);
> - strlcpy(str, cproperty_char ? : USB251XB_DEF_SERIAL_STRING,
> + strscpy(str, cproperty_char ? : USB251XB_DEF_SERIAL_STRING,
> sizeof(str));
> hub->serial_len = strlen(str) & 0xFF;
> memset(hub->serial, 0, USB251XB_STRING_BUFSIZE);
> diff --git a/drivers/usb/storage/onetouch.c b/drivers/usb/storage/onetouch.c
> index 1db2eefeea22..01f3c2779ccf 100644
> --- a/drivers/usb/storage/onetouch.c
> +++ b/drivers/usb/storage/onetouch.c
> @@ -201,7 +201,7 @@ static int onetouch_connect_input(struct us_data *ss)
> onetouch->dev = input_dev;
>
> if (udev->manufacturer)
> - strlcpy(onetouch->name, udev->manufacturer,
> + strscpy(onetouch->name, udev->manufacturer,
> sizeof(onetouch->name));
> if (udev->product) {
> if (udev->manufacturer)
> diff --git a/drivers/usb/typec/tcpm/fusb302.c b/drivers/usb/typec/tcpm/fusb302.c
> index 96c55eaf3f80..ab89c014606e 100644
> --- a/drivers/usb/typec/tcpm/fusb302.c
> +++ b/drivers/usb/typec/tcpm/fusb302.c
> @@ -151,7 +151,7 @@ static void _fusb302_log(struct fusb302_chip *chip, const char *fmt,
>
> if (fusb302_log_full(chip)) {
> chip->logbuffer_head = max(chip->logbuffer_head - 1, 0);
> - strlcpy(tmpbuffer, "overflow", sizeof(tmpbuffer));
> + strscpy(tmpbuffer, "overflow", sizeof(tmpbuffer));
> }
>
> if (chip->logbuffer_head < 0 ||
> diff --git a/drivers/usb/usbip/stub_main.c b/drivers/usb/usbip/stub_main.c
> index 77a5b3f8736a..e8c3131a8543 100644
> --- a/drivers/usb/usbip/stub_main.c
> +++ b/drivers/usb/usbip/stub_main.c
> @@ -100,7 +100,7 @@ static int add_match_busid(char *busid)
> for (i = 0; i < MAX_BUSID; i++) {
> spin_lock(&busid_table[i].busid_lock);
> if (!busid_table[i].name[0]) {
> - strlcpy(busid_table[i].name, busid, BUSID_SIZE);
> + strscpy(busid_table[i].name, busid, BUSID_SIZE);
> if ((busid_table[i].status != STUB_BUSID_ALLOC) &&
> (busid_table[i].status != STUB_BUSID_REMOV))
> busid_table[i].status = STUB_BUSID_ADDED;
--
Regards,
Laurent Pinchart
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