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我正在使用可插入驗證模塊（PAM）在MySQL上安裝AD驗證（安裝在RHEL 6.6上）。MySQL 5.7（RHEL6.6）使用AD的PAM驗證
到目前爲止，我的AD用戶可以使用AD證書在RHEL框中登錄。但是當我嘗試使用PAM插件登錄到MySQL時，出現Access Denied錯誤。 MySQL的PAM配置如下：
/etc/pam.d/mysql:
auth required pam_winbind.so
account required pam_winbind.so
當我檢查MySQL的錯誤日誌，我看到（）中所述方法authenticate_pam拋出系統錯誤。以下是mysqld的日誌：
entering auth_pam_server
entering auth_pam_next_token
auth_pam_next_token:reading at [mysql, MySQLUsers=mysql_ad], sep=[,]
auth_pam_next_token:state=PRESPACE, ptr=[mysql, MySQLUsers=mysql_ad], out=[]
auth_pam_next_token:state=IDENT, ptr=[mysql, MySQLUsers=mysql_ad], out=[]
auth_pam_next_token:state=AFTERSPACE, ptr=[, MySQLUsers=mysql_ad], out=[mysql]
auth_pam_next_token:state=DELIMITER, ptr=[, MySQLUsers=mysql_ad], out=[mysql]
auth_pam_next_token:state=DONE, ptr=[, MySQLUsers=mysql_ad], out=[mysql]
leaving auth_pam_next_token on /export/home/pb2/build/sb_0-19016729-1464156482.79/rpm/BUILD/mysqlcom-pro-5.7.13/mysqlcom-pro-5.7.13/plugin/pam-authentication-plugin/src/parser.c:195
auth_pam_server:password ******** received
auth_pam_server:pam_start rc=0
auth_pam_server:pam_set_item(PAM_RUSER,administrator) rc=0
auth_pam_server:pam_set_item(PAM_RHOST,localhost) rc=0
entering auth_pam_server_conv
auth_pam_server_conv:PAM_PROMPT_ECHO_OFF [Password: ] received
leaving auth_pam_server_conv on /export/home/pb2/build/sb_0-19016729-1464156482.79/rpm/BUILD/mysqlcom-pro-5.7.13/mysqlcom-pro-5.7.13/plugin/pam-authentication-plugin/src/authentication_pam.c:269
**auth_pam_server:pam_authenticate rc=4
auth_pam_server: rc=4
PAM error: System error**
leaving auth_pam_server on /export/home/pb2/build/sb_0-19016729-1464156482.79/rpm/BUILD/mysqlcom-pro-5.7.13/mysqlcom-pro-5.7.13/plugin/pam-authentication-plugin/src/authentication_pam.c:441
2016-07-18T12:48:22.360536Z 122 [Note] Access denied for user 'administrator'@'localhost' (using password: YES)
則根據上面的PAM配置，PAM使用winbind的查找AD中的用戶憑證和認證，這對於AD用戶認證到Linux箱相同的處理。而當我看到winbind的日誌，我看到以下內容：
[2016/07/18 08:27:24.236701, 5] winbindd/winbindd_pam.c:1868(winbindd_dual_pam_auth)
Plain-text authentication for user CORPAD\administrator returned NT_STATUS_OK (PAM: 0)
這告訴我，認證工作由winbind的很好，但是當winbind的返回控制到PAM，什麼是失敗，系統錯誤被拋出。