From 646e5b28b4fdbc1b828a2398d6ced2c1dd308a46 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Fri, 21 Aug 2026 17:45:45 +0200 Subject: USB: serial: fix driver deregistration order USB serial driver modules register one driver for the USB bus and one or more drivers for the ports on the USB serial bus. When unloading a driver module, the USB driver must be deregistered before the USB serial bus drivers so that I/O is stopped before unbinding the ports to avoid use-after-free in completion handlers accessing port data. Note that the "new_id" attributes must first be removed to prevent new ids from being added and triggering a probe of the USB driver after it has been deregistered. Fixes: 765e0ba62613 ("usb-serial: new API for driver registration") Cc: stable@vger.kernel.org # 3.4 Cc: Alan Stern Signed-off-by: Johan Hovold --- include/linux/usb/serial.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux/usb') diff --git a/include/linux/usb/serial.h b/include/linux/usb/serial.h index 534e6650e2aa..ab0a32a90629 100644 --- a/include/linux/usb/serial.h +++ b/include/linux/usb/serial.h @@ -381,6 +381,7 @@ void usb_serial_handle_dcd_change(struct usb_serial_port *usb_port, int usb_serial_bus_register(struct usb_serial_driver *device); void usb_serial_bus_deregister(struct usb_serial_driver *device); +void usb_serial_bus_remove_new_id(struct usb_serial_driver *driver); extern const struct bus_type usb_serial_bus_type; extern struct tty_driver *usb_serial_tty_driver; -- cgit v1.2.3