linux-kernel - Re: [PATCH v4 0/12] ptrace: cleaning up ptrace

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Message-ID: <20220510141119.GA23277@redhat.com>
Date:   Tue, 10 May 2022 16:11:21 +0200
From:   Oleg Nesterov <oleg@...hat.com>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     linux-kernel@...r.kernel.org, rjw@...ysocki.net, mingo@...nel.org,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, mgorman@...e.de, bigeasy@...utronix.de,
        Will Deacon <will@...nel.org>, tj@...nel.org,
        linux-pm@...r.kernel.org, Peter Zijlstra <peterz@...radead.org>,
        Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Johannes Berg <johannes@...solutions.net>,
        linux-um@...ts.infradead.org, Chris Zankel <chris@...kel.net>,
        Max Filippov <jcmvbkbc@...il.com>,
        linux-xtensa@...ux-xtensa.org, Jann Horn <jannh@...gle.com>,
        Kees Cook <keescook@...omium.org>, linux-ia64@...r.kernel.org
Subject: Re: [PATCH v4 0/12] ptrace: cleaning up ptrace_stop

On 05/05, Eric W. Biederman wrote:
>
> Eric W. Biederman (11):
>       signal: Rename send_signal send_signal_locked
>       signal: Replace __group_send_sig_info with send_signal_locked
>       ptrace/um: Replace PT_DTRACE with TIF_SINGLESTEP
>       ptrace/xtensa: Replace PT_SINGLESTEP with TIF_SINGLESTEP
>       ptrace: Remove arch_ptrace_attach
>       signal: Use lockdep_assert_held instead of assert_spin_locked
>       ptrace: Reimplement PTRACE_KILL by always sending SIGKILL
>       ptrace: Document that wait_task_inactive can't fail
>       ptrace: Admit ptrace_stop can generate spuriuos SIGTRAPs
>       ptrace: Don't change __state
>       ptrace: Always take siglock in ptrace_resume
>
> Peter Zijlstra (1):
>       sched,signal,ptrace: Rework TASK_TRACED, TASK_STOPPED state

OK, lgtm.

Reviewed-by: Oleg Nesterov <oleg@...hat.com>


I still dislike you removed TASK_WAKEKILL from TASK_TRACED, but I can't
find a good argument against it ;) and yes, this is subjective.

Oleg.