int kernel_execve(const char *kernel_filename,
		  const char *const *argv, const char *const *envp)
{
	struct filename *filename;
	struct linux_binprm *bprm;
	int fd = AT_FDCWD;
	int retval;

	filename = getname_kernel(kernel_filename);
	if (IS_ERR(filename))
		return PTR_ERR(filename);

	bprm = alloc_bprm(fd, filename);
	if (IS_ERR(bprm)) {
		retval = PTR_ERR(bprm);
		goto out_ret;
	}

	retval = count_strings_kernel(argv);
	if (retval < 0)
		goto out_free;
	bprm->argc = retval;

	retval = count_strings_kernel(envp);
	if (retval < 0)
		goto out_free;
	bprm->envc = retval;

	retval = bprm_stack_limits(bprm);
	if (retval < 0)
		goto out_free;

	retval = copy_string_kernel(bprm->filename, bprm);
	if (retval < 0)
		goto out_free;
	bprm->exec = bprm->p;

	retval = copy_strings_kernel(bprm->envc, envp, bprm);
	if (retval < 0)
		goto out_free;

	retval = copy_strings_kernel(bprm->argc, argv, bprm);
	if (retval < 0)
		goto out_free;

	retval = bprm_execve(bprm, fd, filename, 0);
out_free:
	free_bprm(bprm);
out_ret:
	putname(filename);
	return retval;
}
int kernel_execve(const char *kernel_filename,
		  const char *const *argv, const char *const *envp)
{
	struct filename *filename;
	struct linux_binprm *bprm;
	int fd = AT_FDCWD;
	int retval;

	filename = getname_kernel(kernel_filename);
	if (IS_ERR(filename))
		return PTR_ERR(filename);

	bprm = alloc_bprm(fd, filename);
	if (IS_ERR(bprm)) {
		retval = PTR_ERR(bprm);
		goto out_ret;
	}

	retval = count_strings_kernel(argv);
	if (retval < 0)
		goto out_free;
	bprm->argc = retval;

	retval = count_strings_kernel(envp);
	if (retval < 0)
		goto out_free;
	bprm->envc = retval;

	retval = bprm_stack_limits(bprm);
	if (retval < 0)
		goto out_free;

	retval = copy_string_kernel(bprm->filename, bprm);
	if (retval < 0)
		goto out_free;
	bprm->exec = bprm->p;

	retval = copy_strings_kernel(bprm->envc, envp, bprm);
	if (retval < 0)
		goto out_free;

	retval = copy_strings_kernel(bprm->argc, argv, bprm);
	if (retval < 0)
		goto out_free;

	retval = bprm_execve(bprm, fd, filename, 0);
out_free:
	free_bprm(bprm);
out_ret:
	putname(filename);
	return retval;
}