[jailed root] parent (host, pid 10198) rtprio probe:
  rtprio(RTP_LOOKUP, 10198)      = OK  type=1 prio=7   <== LEAK
  getpriority(PROCESS, 10198)    = No such process (prison-checked)
  setpriority(PROCESS, 10198, 10) = No such process (prison-checked)
  rtprio(RTP_LOOKUP, 1/init)  = OK  type=1 prio=0   <== LEAK
[jailed root] done
[host root] parent still here, rtprio of pid 10198 leaked across jail boundary if child printed LEAK lines
rc=0