Hi,
On Mon, Mar 19, 2018 at 08:12:28AM +0100, Heinrich Schuchardt wrote:
> musb->endpoints[] has array size MUSB_C_NUM_EPS.
> We must check array bounds before accessing the array and not afterwards.
>
> Signed-off-by: Heinrich Schuchardt <xypron.glpk@xxxxxx>
> ---
> drivers/usb/musb/musb_gadget_ep0.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/musb/musb_gadget_ep0.c b/drivers/usb/musb/musb_gadget_ep0.c
> index 18da4873e52e..482e7c2f8dc7 100644
> --- a/drivers/usb/musb/musb_gadget_ep0.c
> +++ b/drivers/usb/musb/musb_gadget_ep0.c
> @@ -88,6 +88,11 @@ static int service_tx_status_request(
> break;
> }
>
> + if (epnum >= MUSB_C_NUM_EPS) {
only the LSB 4 bits are the EP number, bit7 is the direction flag. So
you can only compare the LSB 4 bits here.
Regards,
-Bin.
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