[PATCH v2] usb: gadget: aspeed_udc: validate endpoint index for ast udc

[Greg KH]

On Mon, Jun 24, 2024 at 09:53:13AM +0800, Ma Ke wrote:
> We should verify the bound of the array to assure that host
> may not manipulate the index to point past endpoint array.
> 
> Found by static analysis.
> 
> Signed-off-by: Ma Ke <make24 at iscas.ac.cn>
> ---
>  drivers/usb/gadget/udc/aspeed_udc.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/usb/gadget/udc/aspeed_udc.c b/drivers/usb/gadget/udc/aspeed_udc.c
> index 3916c8e2ba01..d972ef4644bc 100644
> --- a/drivers/usb/gadget/udc/aspeed_udc.c
> +++ b/drivers/usb/gadget/udc/aspeed_udc.c
> @@ -1009,6 +1009,8 @@ static void ast_udc_getstatus(struct ast_udc_dev *udc)
>  		break;
>  	case USB_RECIP_ENDPOINT:
>  		epnum = crq.wIndex & USB_ENDPOINT_NUMBER_MASK;
> +		if (epnum >= AST_UDC_NUM_ENDPOINTS)
> +			goto stall;
>  		status = udc->ep[epnum].stopped;
>  		break;
>  	default:
> -- 
> 2.25.1
> 
> 

Hi,

This is the friendly patch-bot of Greg Kroah-Hartman.  You have sent him
a patch that has triggered this response.  He used to manually respond
to these common problems, but in order to save his sanity (he kept
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created.  Hopefully you will not take offence and will fix the problem
in your patch and resubmit it so that it can be accepted into the Linux
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