COTP-352417：修复COTP-82775后EMS每天报告auditlog.change.detected (BURT 1524672)

问题描述

• 在ONTAP升级到修复了 错误 1524672的版本后， 对于先前轮换的audit.log.xxx ，集群中只有一个节点在00:05 (本地时间)报告每日auditlog.change.detected 事件：
  Mon Jun 17 00:05:00 +0900 [Node-01: mgwd: auditlog.change.detected:error]: Audit log file "audit.log.0000001562" was tampered with.
Mon Jun 18 00:05:36 +0900 [Node-01: mgwd: auditlog.change.detected:error]: Audit log file "audit.log.0000001563" was tampered with.
Mon Jun 19 00:05:44 +0900 [Node-01: mgwd: auditlog.change.detected:error]: Audit log file "audit.log.0000001564" was tampered with.
...
  

• 在mgwd.log 中，audit.log.xxx 文件会显示以下错误消息：
  00000025.000bea70 01e5bc7a Fri Jul 26 2024 00:05:00 -04:00 [kern_mgwd:info:3205] 0x8318d7b00: 8603e9000000012a: ERR: tables::audit: Audit log signature file /mroot/etc/log/mlog/audit_log_sig/audit.log.0000001562.sig is empty.Hence, Signature verification failed for file: audit.log.0000001562. Line: 1398, Function: verify_hashes ...
  

• 事件中提及的audit.log.xxx 文件的文件大小均超过350字节。使用systemshell列出目录：
  % ls -lh /mroot/etc/log/mlog/audit.log(star)
-rw-r--r--  2 root  wheel    70M Jun 18 10:03 /mroot/etc/log/mlog/audit.log
-rw-r--r--  1 root  wheel    76M May  1 14:17 /mroot/etc/log/mlog/audit.log.0000001562
-rw-r--r--  1 root  wheel    72M May  2 14:17 /mroot/etc/log/mlog/audit.log.0000001563
-rw-r--r--  1 root  wheel    72M May  3 14:17 /mroot/etc/log/mlog/audit.log.0000001564