Re: [PATCH 1/2] USB: serial: console: fix use-after-free on disconnect

From: Greg KH
Date: Wed Oct 04 2017 - 10:39:31 EST

On Wed, Oct 04, 2017 at 11:01:12AM +0200, Johan Hovold wrote:
> A clean-up patch removing removing two redundant NULL-checks from the
> console disconnect handler inadvertently also removed a third check.
> This could lead to the struct usb_serial being prematurely freed by the
> console code when a driver accepts but does not register any ports for
> an interface which also lacks endpoint descriptors.
> Fixes: 0e517c93dc02 ("USB: serial: console: clean up sanity checks")
> Cc: stable <stable@xxxxxxxxxxxxxxx> # 4.11
> Reported-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx>
> Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>

Acked-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>