if err != nil {
			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, err), r.URL)
			return
		}
	}

	accountName := cred.AccessKey
	if cred.IsTemp() || cred.IsServiceAccount() {
		// For derived credentials, check the parent user's permissions.
		accountName = cred.ParentUser
	}

	roleArn := policy.Args{Claims: cred.Claims}.GetRoleArn()

		n := 0
		// Use the following trick to filter in place
		// https://github.com/golang/go/wiki/SliceTricks#filter-in-place
		for _, bucketInfo := range bucketsInfo {
			if globalIAMSys.IsAllowed(policy.Args{
				AccountName:     cred.AccessKey,
				Groups:          cred.Groups,
				Action:          policy.ListBucketAction,
				BucketName:      bucketInfo.Name,
				ConditionValues: getConditionValues(r, "", cred),

	ok, parentUser, err := sys.IsTempUser(args.AccountName)
	if err != nil {
		return false
	}
	if ok {
		return sys.IsAllowedSTS(args, parentUser)
	}

	// If the credential is for a service account, perform related check
	ok, parentUser, err = sys.IsServiceAccount(args.AccountName)
	if err != nil {
		return false
	}
	if ok {