---
- branch: MAIN
  date: Tue May 29 23:34:18 UTC 2018
  files:
  - new: '1.43'
    old: '1.42'
    path: src/sys/kern/sys_ptrace_common.c
    pathrev: src/sys/kern/sys_ptrace_common.c@1.43
    type: modified
  id: 20180529T233418Z.c0faddfa41565b3b70bef0f13ea9014ff199206f
  log: |
    Harden PT_ATTACH in ptrace(2)

    Don't allow to PT_ATTACH from a vfork(2)ed child (before exec(3)/_exit(3))
    to its parent. Return error with EPERM errno.

    This scenario does not have a purpose and there is no clear picture how to
    route signals.

    Sponsored by <The NetBSD Foundation>
  module: src
  subject: 'CVS commit: src/sys/kern'
  unixtime: '1527636858'
  user: kamil