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

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Message-ID: <20171004143935.GD13707@kroah.com>
Date:   Wed, 4 Oct 2017 16:39:35 +0200
From:   Greg KH <greg@...ah.com>
To:     Johan Hovold <johan@...nel.org>
Cc:     linux-usb@...r.kernel.org,
        Andrey Konovalov <andreyknvl@...gle.com>,
        linux-kernel@...r.kernel.org, stable <stable@...r.kernel.org>
Subject: Re: [PATCH 1/2] USB: serial: console: fix use-after-free on
 disconnect

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@...r.kernel.org>     # 4.11
> Reported-by: Andrey Konovalov <andreyknvl@...gle.com>
> Signed-off-by: Johan Hovold <johan@...nel.org>

Acked-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>