Fix for CVE-2019-17572 in apache/rocketmq (project apache__rocketmq_CVE-2019-17572_4.6.0), commit f8f6fbe4aa7f5dee937e688322628c366b12a552
Fixed file: broker/src/main/java/org/apache/rocketmq/broker/processor/AdminBrokerProcessor.java
Fixed class: AdminBrokerProcessor (lines 138-1597)
Fixed method: updateAndCreateTopic (lines 246-282)
Method signature: RemotingCommand updateAndCreateTopic(ChannelHandlerContext,RemotingCommand)