static int check_modinfo(struct module *mod, struct load_info *info, int flags)
{
	const char *modmagic = get_modinfo(info, "vermagic");
	int err;

	if (flags & MODULE_INIT_IGNORE_VERMAGIC)
		modmagic = NULL;

	/* This is allowed: modprobe --force will invalidate it. */
	if (!modmagic) {
		err = try_to_force_load(mod, "bad vermagic");
		if (err)
			return err;
	} else if (!same_magic(modmagic, vermagic, info->index.vers)) {
		pr_err("%s: version magic '%s' should be '%s'\n",
		       info->name, modmagic, vermagic);
		return -ENOEXEC;
	}

	if (!get_modinfo(info, "intree")) {
		if (!test_taint(TAINT_OOT_MODULE))
			pr_warn("%s: loading out-of-tree module taints kernel.\n",
				mod->name);
		add_taint_module(mod, TAINT_OOT_MODULE, LOCKDEP_STILL_OK);
	}

	check_modinfo_retpoline(mod, info);

	if (get_modinfo(info, "staging")) {
		add_taint_module(mod, TAINT_CRAP, LOCKDEP_STILL_OK);
		pr_warn("%s: module is from the staging directory, the quality "
			"is unknown, you have been warned.\n", mod->name);
	}

	err = check_modinfo_livepatch(mod, info);
	if (err)
		return err;

	/* Set up license info based on the info section */
	set_license(mod, get_modinfo(info, "license"));

	return 0;
}
static int check_modinfo(struct module *mod, struct load_info *info, int flags)
{
	const char *modmagic = get_modinfo(info, "vermagic");
	int err;

	if (flags & MODULE_INIT_IGNORE_VERMAGIC)
		modmagic = NULL;

	 
	if (!modmagic) {
		err = try_to_force_load(mod, "bad vermagic");
		if (err)
			return err;
	} else if (!same_magic(modmagic, vermagic, info->index.vers)) {
		pr_err("%s: version magic '%s' should be '%s'\n",
		       info->name, modmagic, vermagic);
		return -ENOEXEC;
	}

	if (!get_modinfo(info, "intree")) {
		if (!test_taint(TAINT_OOT_MODULE))
			pr_warn("%s: loading out-of-tree module taints kernel.\n",
				mod->name);
		add_taint_module(mod, TAINT_OOT_MODULE, LOCKDEP_STILL_OK);
	}

	check_modinfo_retpoline(mod, info);

	if (get_modinfo(info, "staging")) {
		add_taint_module(mod, TAINT_CRAP, LOCKDEP_STILL_OK);
		pr_warn("%s: module is from the staging directory, the quality "
			"is unknown, you have been warned.\n", mod->name);
	}

	err = check_modinfo_livepatch(mod, info);
	if (err)
		return err;

	 
	set_license(mod, get_modinfo(info, "license"));

	return 0;
}