linux-kernel - Re: [PATCH v2 1/1] mm/madvise: replace ptrace attach requirement for process

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Message-ID: <CAJuCfpG0+_4x=F7dpKabgmGwDf2KGcCcEfXixLBef6+zg8uNjQ@mail.gmail.com>
Date:   Wed, 20 Jan 2021 08:49:07 -0800
From:   Suren Baghdasaryan <surenb@...gle.com>
To:     James Morris <jmorris@...ei.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Jann Horn <jannh@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Jeffrey Vander Stoep <jeffv@...gle.com>,
        Minchan Kim <minchan@...nel.org>,
        Michal Hocko <mhocko@...e.com>,
        Shakeel Butt <shakeelb@...gle.com>,
        David Rientjes <rientjes@...gle.com>,
        Edgar Arriaga García <edgararriaga@...gle.com>,
        Tim Murray <timmurray@...gle.com>,
        linux-mm <linux-mm@...ck.org>, selinux@...r.kernel.org,
        Linux API <linux-api@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        kernel-team <kernel-team@...roid.com>,
        linux-security-module@...r.kernel.org
Subject: Re: [PATCH v2 1/1] mm/madvise: replace ptrace attach requirement for process_madvise

On Tue, Jan 19, 2021 at 9:02 PM James Morris <jmorris@...ei.org> wrote:
>
> On Mon, 11 Jan 2021, Suren Baghdasaryan wrote:
>
> > Replace PTRACE_MODE_ATTACH with a combination of PTRACE_MODE_READ
> > and CAP_SYS_NICE. PTRACE_MODE_READ to prevent leaking ASLR metadata
> > and CAP_SYS_NICE for influencing process performance.
>
>
> Almost missed these -- please cc the LSM mailing list when modifying
> capabilities or other LSM-related things.

Thanks for the note. Will definitely include it when sending the next version.

>
> --
> James Morris
> <jmorris@...ei.org>
>
> --
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