[PATCH v2] usb: misc: usbio: Fix URB memory leak on submit failure

[Felix Gu]

When usb_submit_urb() fails in usbio_probe(), the previously allocated
URB is never freed, causing a memory leak.

Fix this by jumping to err_free_urb label to properly release the URB
on the error path.

Fixes: 121a0f839dbb ("usb: misc: Add Intel USBIO bridge driver")
Signed-off-by: Felix Gu <ustc.gu@xxxxxxxxx>
---
Changes in v2:
- Fix Oliver's comment.
- Link to v1: https://lore.kernel.org/lkml/20260330-usbio-v1-1-7141b6dc612a@xxxxxxxxx
---
 drivers/usb/misc/usbio.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/misc/usbio.c b/drivers/usb/misc/usbio.c
index 2e68d48a2cc0..02d1e0760f0c 100644
--- a/drivers/usb/misc/usbio.c
+++ b/drivers/usb/misc/usbio.c
@@ -614,8 +614,10 @@ static int usbio_probe(struct usb_interface *intf, const struct usb_device_id *i
 	usb_fill_bulk_urb(usbio->urb, udev, usbio->rx_pipe, usbio->rxbuf,
 			  usbio->rxbuf_len, usbio_bulk_recv, usbio);
 	ret = usb_submit_urb(usbio->urb, GFP_KERNEL);
-	if (ret)
-		return dev_err_probe(dev, ret, "Submitting usb urb\n");
+	if (ret) {
+		dev_err_probe(dev, ret, "Submitting usb urb\n");
+		goto err_free_urb;
+	}
 
 	mutex_lock(&usbio->ctrl_mutex);
 
@@ -663,6 +665,7 @@ static int usbio_probe(struct usb_interface *intf, const struct usb_device_id *i
 err_unlock:
 	mutex_unlock(&usbio->ctrl_mutex);
 	usb_kill_urb(usbio->urb);
+err_free_urb:
 	usb_free_urb(usbio->urb);
 
 	return ret;

---
base-commit: 3b058d1aeeeff27a7289529c4944291613b364e9
change-id: 20260330-usbio-d70e15c97a7a

Best regards,
-- 
Felix Gu <ustc.gu@xxxxxxxxx>