linux-kernel - Re: [PATCH RFC v3 6/7] proc: support new 'pids=all|ptraceable' mount option

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Date:   Thu, 9 Nov 2017 18:38:34 -0800
From:   Andy Lutomirski <luto@...nel.org>
To:     Djalal Harouni <tixxdz@...il.com>
Cc:     Kees Cook <keescook@...omium.org>,
        Alexey Gladkov <gladkov.alexey@...il.com>,
        Andy Lutomirski <luto@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux FS Devel <linux-fsdevel@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel-hardening@...ts.openwall.com" 
        <kernel-hardening@...ts.openwall.com>,
        LSM List <linux-security-module@...r.kernel.org>,
        Linux API <linux-api@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Akinobu Mita <akinobu.mita@...il.com>, me@...in.cc,
        Oleg Nesterov <oleg@...hat.com>,
        Jeff Layton <jlayton@...chiereds.net>,
        Ingo Molnar <mingo@...nel.org>,
        Alexey Dobriyan <adobriyan@...il.com>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Daniel Micay <danielmicay@...il.com>,
        Jonathan Corbet <corbet@....net>,
        "J. Bruce Fields" <bfields@...ldses.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Solar Designer <solar@...nwall.com>
Subject: Re: [PATCH RFC v3 6/7] proc: support new 'pids=all|ptraceable' mount option

On Thu, Nov 9, 2017 at 8:14 AM, Djalal Harouni <tixxdz@...il.com> wrote:
> This patch introduces the new 'pids' mount option, as it was discussed
> and suggested by Andy Lutomirski [1].
>
> * If 'pids=' is passed without 'newinstance' then it has no effect.

Would it be safer this were an error instead?