SteamCMD on Linux makes use of split locking, this might be a bug, see this article.
Jan 20 22:45:27 srv1 kernel: [ 239.384567] x86/split lock detection: #AC: CIPCServer::Thr/3697 took a split_lock trap at address: 0xf5fe6aea
Jan 20 22:45:27 srv1 kernel: [ 239.386125] x86/split lock detection: #AC: CJobMgr::m_Work/3704 took a split_lock trap at address: 0xf5fe6aaf
SteamCMD on Linux makes use of split locking, this might be a bug, see this article.