static void oz_usb_handle_ep_data(struct oz_usb_ctx *usb_ctx,
	struct oz_usb_hdr *usb_hdr, int len)
{
	struct oz_data *data_hdr = (struct oz_data *)usb_hdr;

	switch (data_hdr->format) {
	case OZ_DATA_F_MULTIPLE_FIXED: {
 			struct oz_multiple_fixed *body =
 				(struct oz_multiple_fixed *)data_hdr;
 			u8 *data = body->data;
			int n;
			if (!body->unit_size)
 				break;
			n = (len - sizeof(struct oz_multiple_fixed)+1)
 				/ body->unit_size;
 			while (n--) {
 				oz_hcd_data_ind(usb_ctx->hport, body->endpoint,
					data, body->unit_size);
				data += body->unit_size;
			}
		}
		break;
	case OZ_DATA_F_ISOC_FIXED: {
			struct oz_isoc_fixed *body =
				(struct oz_isoc_fixed *)data_hdr;
			int data_len = len-sizeof(struct oz_isoc_fixed)+1;
			int unit_size = body->unit_size;
			u8 *data = body->data;
			int count;
			int i;

			if (!unit_size)
				break;
			count = data_len/unit_size;
			for (i = 0; i < count; i++) {
				oz_hcd_data_ind(usb_ctx->hport,
					body->endpoint, data, unit_size);
				data += unit_size;
			}
		}
		break;
	}

}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.