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References: <20210111170622.2613577-1-surenb@google.com> <c586aa93-52d7-bd6c-3d5-77be4ed4afae@namei.org>
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From:   Suren Baghdasaryan <surenb@google.com>
Date:   Wed, 20 Jan 2021 08:49:07 -0800
Message-ID: <CAJuCfpG0+_4x=F7dpKabgmGwDf2KGcCcEfXixLBef6+zg8uNjQ@mail.gmail.com>
Subject: Re: [PATCH v2 1/1] mm/madvise: replace ptrace attach requirement for process_madvise
To:     James Morris <jmorris@namei.org>
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        Jann Horn <jannh@google.com>,
        Kees Cook <keescook@chromium.org>,
        Jeffrey Vander Stoep <jeffv@google.com>,
        Minchan Kim <minchan@kernel.org>,
        Michal Hocko <mhocko@suse.com>,
        Shakeel Butt <shakeelb@google.com>,
        David Rientjes <rientjes@google.com>,
        =?UTF-8?Q?Edgar_Arriaga_Garc=C3=ADa?= <edgararriaga@google.com>,
        Tim Murray <timmurray@google.com>,
        linux-mm <linux-mm@kvack.org>, selinux@vger.kernel.org,
        Linux API <linux-api@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        kernel-team <kernel-team@android.com>,
        linux-security-module@vger.kernel.org
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On Tue, Jan 19, 2021 at 9:02 PM James Morris <jmorris@namei.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@namei.org>
>
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