net: openvswitch: fix middle attribute validation in push_nsh() action

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EsafeNet CDG SQL注入漏洞

EsafeNet CDG is a document security management system from EsafeNet. EsafeNet CDG V5 version has a SQL injection vulnerability, which originates from the parameter policyId in the file /com/esafenet/policy/action/PolicyPushControlAction.java, which can lead to SQL injection...