linux-kernel - Re: [PATCH AUTOSEL 4.19 095/100] USB: usb-skeleton: fix use-after-free after driver unbind

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Message-ID: <20191018222205.GA6978@kroah.com>
Date:   Fri, 18 Oct 2019 18:22:05 -0400
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Sasha Levin <sashal@...nel.org>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Johan Hovold <johan@...nel.org>, linux-usb@...r.kernel.org
Subject: Re: [PATCH AUTOSEL 4.19 095/100] USB: usb-skeleton: fix
 use-after-free after driver unbind

On Fri, Oct 18, 2019 at 06:05:20PM -0400, Sasha Levin wrote:
> From: Johan Hovold <johan@...nel.org>
> 
> [ Upstream commit 6353001852776e7eeaab4da78922d4c6f2b076af ]
> 
> The driver failed to stop its read URB on disconnect, something which
> could lead to a use-after-free in the completion handler after driver
> unbind in case the character device has been closed.
> 
> Fixes: e7389cc9a7ff ("USB: skel_read really sucks royally")
> Signed-off-by: Johan Hovold <johan@...nel.org>
> Link: https://lore.kernel.org/r/20191009170944.30057-3-johan@kernel.org
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> Signed-off-by: Sasha Levin <sashal@...nel.org>
> ---
>  drivers/usb/usb-skeleton.c | 1 +
>  1 file changed, 1 insertion(+)

This file does not even get built in the kernel tree, no need to
backport anything for it :)

thanks,

greg k-h