static int tee_ioctl_supp_send()

in tee_core.c [778:819]

• 33 lines of code
• 10 McCabe index (conditional complexity)

static int tee_ioctl_supp_send(struct tee_context *ctx,
			       struct tee_ioctl_buf_data __user *ubuf)
{
	long rc;
	struct tee_ioctl_buf_data buf;
	struct tee_iocl_supp_send_arg __user *uarg;
	struct tee_param *params;
	u32 num_params;
	u32 ret;

	/* Not valid for this driver */
	if (!ctx->teedev->desc->ops->supp_send)
		return -EINVAL;

	if (copy_from_user(&buf, ubuf, sizeof(buf)))
		return -EFAULT;

	if (buf.buf_len > TEE_MAX_ARG_SIZE ||
	    buf.buf_len < sizeof(struct tee_iocl_supp_send_arg))
		return -EINVAL;

	uarg = u64_to_user_ptr(buf.buf_ptr);
	if (get_user(ret, &uarg->ret) ||
	    get_user(num_params, &uarg->num_params))
		return -EFAULT;

	if (sizeof(*uarg) + TEE_IOCTL_PARAM_SIZE(num_params) > buf.buf_len)
		return -EINVAL;

	params = kcalloc(num_params, sizeof(struct tee_param), GFP_KERNEL);
	if (!params)
		return -ENOMEM;

	rc = params_from_supp(params, num_params, uarg->params);
	if (rc)
		goto out;

	rc = ctx->teedev->desc->ops->supp_send(ctx, ret, num_params, params);
out:
	kfree(params);
	return rc;
}