Containerize ptrace and kill
User namespaces are not sufficiently implemented to prevent ptrace
and kill between user namespaces. The work to do this has largely
been done
(http://
but needs to be guided upstream, presumably with copious cleanup and
rework.
Doing this work will prevent a task in a child user namespace from
ptracing or killing tasks in the parent namespace, even if the ptracing
task is owned by root or the same uid as the target task in the
parent user namespace.
Blueprint information
- Status:
- Complete
- Approver:
- Robbie Williamson
- Priority:
- High
- Drafter:
- Serge Hallyn
- Direction:
- Approved
- Assignee:
- Serge Hallyn
- Definition:
- Approved
- Series goal:
- Accepted for natty
- Implementation:
-
Implemented
- Milestone target:
-
natty-alpha-2
- Started by
- Robbie Williamson
- Completed by
- Robbie Williamson
Whiteboard
Status: not yet started
Complexity:
Work Items:
[serge-hallyn] forward-port existing userns patchset: DONE
[serge-hallyn] prune out extra functionality: DONE
[serge-hallyn] extensive testing: DONE
[serge-hallyn] post targeted capabilities: DONE
[serge-hallyn] Add ptrace checks: DONE
[serge-hallyn] tweak patchset according to community feedback: DONE
[serge-hallyn] Add and post setuid checks: DONE
[serge-hallyn] Implement VFS userns checks (without policy) : DONE
[serge-hallyn] push upstream: DONE
[serge-hallyn] post basic POC VFS user namespaces support: DONE
https:/
Work Items
Dependency tree
* Blueprints in grey have been implemented.
