From: Jeff Xu <jeffxu@google.com>
To: Shuah Khan <skhan@linuxfoundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Kees Cook <keescook@chromium.org>, Peter Xu <peterx@redhat.com>,
jeffxu@chromium.org, dmitry.torokhov@gmail.com,
dverkamp@chromium.org, hughd@google.com, jorgelo@chromium.org,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
linux-mm@kvack.org, jannh@google.com,
linux-hardening@vger.kernel.org,
kernel test robot <lkp@intel.com>
Subject: Re: [PATCH v6 3/6] mm/memfd: add MFD_NOEXEC_SEAL and MFD_EXEC
Date: Fri, 23 Dec 2022 10:06:49 -0800 [thread overview]
Message-ID: <CALmYWFs3Qm_89e8cCcVu0otrZpMVe3rWxqANAQwQDJgaK3S+oA@mail.gmail.com> (raw)
In-Reply-To: <f185bb42-b29c-977e-312e-3349eea15383@linuxfoundation.org>
On Tue, Dec 20, 2022 at 8:55 AM Shuah Khan <skhan@linuxfoundation.org> wrote:
>
> On 12/16/22 16:40, Jeff Xu wrote:
> > On Fri, Dec 16, 2022 at 2:06 PM Andrew Morton <akpm@linux-foundation.org> wrote:
> >>
> >> On Fri, 16 Dec 2022 13:46:58 -0800 Jeff Xu <jeffxu@google.com> wrote:
> >>
> >>> On Fri, Dec 16, 2022 at 12:35 PM Kees Cook <keescook@chromium.org> wrote:
> >>>>
> >>>> On Fri, Dec 16, 2022 at 10:11:44AM -0800, Jeff Xu wrote:
> >>>>> Once per boot seems too little, it would be nice if we can list all processes.
> >>>>> I agree ratelimited might be too much.
> >>>>> There is a feature gap here for logging.
> >>>>>
> >>>>> Kees, what do you think ?
> >>>>
> >>>> I agree once per boot is kind of frustrating "I fixed the one warning,
> >>>> oh, now it's coming from a different process". But ratelimit is, in
> >>>> retrospect, still too often.
> >>>>
> >>>> Let's go with per boot -- this should be noisy "enough" to get the
> >>>> changes in API into the callers without being too much of a hassle.
> >>>>
> >>> Agreed. Let's go with per boot.
> >>>
> >>> Hi Andrew, what is your preference ? I can send a patch or you
> >>> directly fix it in mm-unstable ?
> >>
> >> Like this?
> >>
> > Yes. Thanks!
> >
>
> Sorry jumping into this discussion a bit late. Is it possible to provide
> a way to enable full logging as a debug option to tag more processes?
>
Codewise it is possible, maybe by adding a sysctl or CONFIG_, but I am not sure
the best practice to do this with the kernel?
Kees/Andrew, do you have suggestions ?
Thanks
Jeff
> thanks,
> -- Shuah
>
next prev parent reply other threads:[~2022-12-23 18:07 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20221207154939.2532830-1-jeffxu@google.com>
2022-12-08 16:13 ` [PATCH v6 0/6] mm/memfd: introduce " Kees Cook
2022-12-08 18:33 ` Jeff Xu
2022-12-08 20:55 ` Kees Cook
[not found] ` <20221207154939.2532830-2-jeffxu@google.com>
2022-12-08 16:16 ` [PATCH v6 1/6] mm/memfd: add F_SEAL_EXEC Kees Cook
[not found] ` <20221207154939.2532830-3-jeffxu@google.com>
2022-12-08 16:21 ` [PATCH v6 2/6] selftests/memfd: add tests for F_SEAL_EXEC Kees Cook
[not found] ` <20221207154939.2532830-4-jeffxu@google.com>
2022-12-08 16:27 ` [PATCH v6 3/6] mm/memfd: add MFD_NOEXEC_SEAL and MFD_EXEC Kees Cook
2022-12-08 22:55 ` Jeff Xu
2022-12-16 15:46 ` Peter Xu
2022-12-16 17:15 ` Jeff Xu
2022-12-16 17:42 ` Andrew Morton
2022-12-16 18:11 ` Jeff Xu
2022-12-16 20:35 ` Kees Cook
2022-12-16 21:46 ` Jeff Xu
2022-12-16 22:06 ` Andrew Morton
2022-12-16 23:40 ` Jeff Xu
2022-12-20 16:55 ` Shuah Khan
2022-12-23 18:06 ` Jeff Xu [this message]
[not found] ` <20221207154939.2532830-5-jeffxu@google.com>
2022-12-08 16:27 ` [PATCH v6 4/6] mm/memfd: Add write seals when apply SEAL_EXEC to executable memfd Kees Cook
[not found] ` <20221207154939.2532830-6-jeffxu@google.com>
2022-12-08 16:30 ` [PATCH v6 5/6] selftests/memfd: add tests for MFD_NOEXEC_SEAL MFD_EXEC Kees Cook
[not found] ` <20221207154939.2532830-7-jeffxu@google.com>
2022-12-08 16:32 ` [PATCH v6 6/6] mm/memfd: security hook for memfd_create Kees Cook
2022-12-08 16:46 ` Kees Cook
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