linux-kernel - Re: [PATCH 1/7] USB: cdc-acm: fix double free on probe failure

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Message-ID: <666092069a37e8c545f0c441a6d66622501cfa6f.camel@suse.com>
Date:   Mon, 22 Mar 2021 10:38:51 +0100
From:   Oliver Neukum <oneukum@...e.com>
To:     Johan Hovold <johan@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, Jaejoong Kim <climbbb.kim@...il.com>
Subject: Re: [PATCH 1/7] USB: cdc-acm: fix double free on probe failure

Am Donnerstag, den 18.03.2021, 16:51 +0100 schrieb Johan Hovold:
> If tty-device registration fails the driver copy of any Country
> Selection functional descriptor would end up being freed twice; first
> explicitly in the error path and then again in the tty-port destructor.
> 
> Drop the first erroneous free that was left when fixing a tty-port
> resource leak.
> 
> Fixes: cae2bc768d17 ("usb: cdc-acm: Decrement tty port's refcount if probe() fail")
> Cc: stable@...r.kernel.org      # 4.19
> Cc: Jaejoong Kim <climbbb.kim@...il.com>
> Signed-off-by: Johan Hovold <johan@...nel.org>
Acked-by: Oliver Neukum <oneukum@...e.com>