Re: [PATCH 0/3] ptrace: Stop supporting SIGKILL for PTRACE_EVENT_EXIT

[Keno Fischer]

Hi Eric,

On Fri, Jul 8, 2022 at 6:25 PM Eric W. Biederman <ebiederm@xxxxxxxxxxxx> wrote:
> > Recently I had a conversation where it was pointed out to me that
> > SIGKILL sent to a tracee stropped in PTRACE_EVENT_EXIT is quite
> > difficult for a tracer to handle.
> >
>
> RR folks any comments?
>
> Did I properly understand what Keno Fischer was asking for when we
> talked in person?

Yes, this is indeed what I had in mind. I have not yet had the opportunity
to try out your patch series (sorry), but from visual inspection, it does indeed
do what I wanted, which is to make sure that a tracee stays in
PTRACE_EVENT_EXIT for the tracer to inspect, even if there is another
SIGKILL incoming simultaneously (since otherwise it may be impossible
for the tracer to observe the PTRACE_EVENT_EXIT if two SIGKILLs
come in rapid succession). I will try to take this series for a proper spin
shortly.

Keno