USB: serial: fix driver deregistration order

Browse source

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: 765e0ba626 ("usb-serial: new API for driver registration")
Cc: stable@vger.kernel.org	# 3.4
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Johan Hovold <johan@kernel.org>

...

This commit is contained in:

Johan Hovold 2026-08-21 17:45:45 +02:00

parent 63594e8ffe

commit 646e5b28b4

3 changed files with 23 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

4

drivers/usb/serial/bus.c

View file

21

drivers/usb/serial/usb-serial.c

View file

1

include/linux/usb/serial.h

View file