[v2] USB: hso: Fix OOB memory access in hso_probe/hso_get_config_data

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Mon, Dec 10, 2018 at 01:50:20PM +0100, Sebastian Andrzej Siewior wrote:
> On 2018-12-10 09:04:43 [+0100], Greg KH wrote:
> > From: Hui Peng <benquike@gmail.com>
> > 
> > The function hso_probe reads if_num from the USB device (as an u8) and uses
> > it without a length check to index an array, resulting in an OOB memory read
> > in hso_probe or hso_get_config_data. Added a length check for both locations
> > and updated hso_probe to bail on error.
> 
> The function hso_probe reads if_num from the USB device (as an u8) and uses
> it without a length check to index an array, resulting in an OOB memory read
> in hso_probe or hso_get_config_data.
> 
> Add a length check for both locations and update hso_probe to bail on
> error.
> 
> > This issue has been assigned CVE-2018-19985.
> >
> > Reported-by: Hui Peng <benquike@gmail.com>
> > Reported-by: Mathias Payer <mathias.payer@nebelwelt.net>
> > Signed-off-by: Hui Peng <benquike@gmail.com>
> > Signed-off-by: Mathias Payer <mathias.payer@nebelwelt.net>
> > Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> 
> Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

Thanks, will update the changelog and add resend.

greg k-h