plugin: fix audit plugin will cause tidb panic (#23803)
plugin: fix audit plugin will cause tidb panic (#23803)

 
c4pt0r/tidb,c4pt0r/tidb,ngaut/tidb,ngaut/tidb,kyle-wang/tidb,c4pt0r/tidb,kyle-wang/tidb,ngaut/tidb,pingcap/tidb,kyle-wang/tidb,c4pt0r/tidb,ngaut/tidb,c4pt0r/tidb,pingcap/tidb,kyle-wang/tidb,pingcap/tidb,kyle-wang/tidb,kyle-wang/tidb,pingcap/tidb,ngaut/tidb,ngaut/tidb,pingcap/tidb,coocood/tidb,coocood/tidb,pingcap/tidb,c4pt0r/tidb