[host] devfs mounted at /jail/dev
[host] /jail/dev/devfs present (control node visible in jail)
[host] /jail/dev/mem hidden by host rule (ruleset enforced)
[host] /dev/console mode pre-jail: 0600
[jail] uid=0 euid=0, jailed
[jail] opening /dev/devfs from inside jail...
[jail] /dev/devfs OPENED from jailed root
[jail] POST: /dev/mem UNHIDDEN by jailed-issued SHOW rule
JAIL-ESCAPE: unhidden + OPENED /dev/zero from inside jail
[jail] issued PERM 0666 rule against host /dev/console
[jail] open(/dev/mem): Operation not permitted (mode gate; boundary already broken)
[host] jail child exit status: 512
[host] /dev/console mode post-jail: 0666 (changed by jailed child => 0666)
EXIT=1