On Thu, 27 Sep 2018, Jann Horn wrote:

quoted

Yes. Since the PTRACE_MODE_NOAUDIT was in PTRACE_MODE_IBPB in Jiri's 
previous patch set and not in PTRACE_MODE_SCHED in this one I assumed 
that there was a good reason for it.

Jiri, was there a good reason for it, and if so, what was it?

[ FWIW PTRACE_MODE_NOAUDIT being in PTRACE_MODE_IBPB goes back to original 
  Tim's pre-CRD patchset ]

Well, we can't really call out into audit from scheduler code, and the 
previous versions of the patchsets didn't have PTRACE_MODE_SCHED, so it 
had to be included in PTRACE_MODE_IBPB in order to make sure we're not 
calling into audit from context switch code.

Or did I misunderstand the question?

Thanks,

-- 
Jiri Kosina
SUSE Labs