linux-kernel - Re: [PATCH 0/3] ptrace: Stop supporting SIGKILL for PTRACE_EVENT

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Date:   Thu, 23 Jun 2022 17:12:48 +0200
From:   Alexander Gordeev <agordeev@...ux.ibm.com>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     Oleg Nesterov <oleg@...hat.com>, linux-kernel@...r.kernel.org,
        mingo@...nel.org, bigeasy@...utronix.de,
        Peter Zijlstra <peterz@...radead.org>,
        Jann Horn <jannh@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        "Robert O'Callahan" <roc@...nos.co>, Kyle Huey <khuey@...nos.co>,
        Keno Fischer <keno@...iacomputing.com>
Subject: Re: [PATCH 0/3] ptrace: Stop supporting SIGKILL for PTRACE_EVENT_EXIT

On Wed, Jun 22, 2022 at 11:43:37AM -0500, Eric W. Biederman 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.
> 
> Keeping SIGKILL working for anything after the process has been killed
> is also a real pain from an implementation point of view.
> 
> So I am attempting to remove this wart in the userspace API and see
> if anyone cares.

Hi Eric,

With this series s390 hits the warning exactly same way. Is that expected?

Thanks!