OSV-2017-119 Stack-buffer-overflow in ot::MeshCoP::CommissionerSessionIdTlv::GetCommissionerSessionId

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=3376 Crash type: Stack-buffer-overflow READ 2 Crash state: ot::MeshCoP::CommissionerSessionIdTlv::GetCommissionerSessionId ot::NetworkData::Leader::HandleCommissioningSet ot::Coap::Coap::ProcessReceivedRequest...