ima: Fix memory leakage in ima_store_template

Offering: HULK
hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6P3K4


CVE: NA

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There is a memory leakage in ima_store_template when ima_add_template_entry
returns a non-zero value and duplicated_entry was successfully
generated. Fix it by freeing duplicated_entry in that case.

Fixes: 31604143 ("ima: Add support for measurement with digest lists")
Signed-off-by: GUO Zihua <guozihua@huawei.com>
Reviewed-by: yiyang <yiyang13@huawei.com>
Reviewed-by: Cai Xinchen <caixinchen1@huawei.com>
Reviewed-by: Wang Weiyang <wangweiyang2@huawei.com>
Reviewed-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>