linux-kernel - Re: [PATCH v4 08/12] ptrace: Document that wait_task

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Date:   Fri, 6 May 2022 08:55:24 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     linux-kernel@...r.kernel.org, rjw@...ysocki.net,
        Oleg Nesterov <oleg@...hat.com>, mingo@...nel.org,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, mgorman@...e.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, Kees Cook <keescook@...omium.org>,
        Jann Horn <jannh@...gle.com>, linux-ia64@...r.kernel.org
Subject: Re: [PATCH v4 08/12] ptrace: Document that wait_task_inactive can't
 fail

On 2022-05-05 13:26:41 [-0500], Eric W. Biederman wrote:
> After ptrace_freeze_traced succeeds it is known that the the tracee
                                                       the

> has a __state value of __TASK_TRACED and that no __ptrace_unlink will
> happen because the tracer is waiting for the tracee, and the tracee is
> in ptrace_stop.

Sebastian