linux-kernel - Re: [PATCH 1/2] ptrace: Move setting/clearing ptrace_message into ptrace

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Message-ID: <20220317174648.GA13318@redhat.com>
Date:   Thu, 17 Mar 2022 18:46:49 +0100
From:   Oleg Nesterov <oleg@...hat.com>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     linux-kernel@...r.kernel.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Alexey Gladkov <legion@...nel.org>,
        Kyle Huey <me@...ehuey.com>, Kees Cook <keescook@...omium.org>,
        Al Viro <viro@...IV.linux.org.uk>, linux-api@...r.kernel.org,
        Jens Axboe <axboe@...nel.dk>
Subject: Re: [PATCH 1/2] ptrace: Move setting/clearing ptrace_message into
 ptrace_stop

On 03/15, Eric W. Biederman wrote:
>
> there are places
> that set ptrace_message and don't clear it, and places that never set
> it.

Yes, I too never understood this.

So I obviously like this change. The only problem (as usual) is that we
can never know if something depends on this old (and strange) behaviour.

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