From: Peter Xu <peterx@redhat.com>
To: Jeff Xu <jeffxu@google.com>
Cc: Kees Cook <keescook@chromium.org>,
jeffxu@chromium.org, skhan@linuxfoundation.org,
akpm@linux-foundation.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, 16 Dec 2022 10:46:59 -0500 [thread overview]
Message-ID: <Y5yS8wCnuYGLHMj4@x1n> (raw)
In-Reply-To: <CALmYWFuKR538vHxqYH1p6mb9iShOohf5bpHZXSfUN4KQHYiwaA@mail.gmail.com>
Hi, Jeff,
On Thu, Dec 08, 2022 at 02:55:45PM -0800, Jeff Xu wrote:
> > > + if (!(flags & (MFD_EXEC | MFD_NOEXEC_SEAL))) {
[...]
> > > + pr_warn_ratelimited(
> > > + "memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=%d '%s'\n",
> > > + task_pid_nr(current), get_task_comm(comm, current));
This will be frequently dumped right now with mm-unstable. Is that what it
wanted to achieve?
[ 10.822575] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=491 'systemd'
[ 10.824743] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=495 '(sd-executor)'
...
If there's already a sane default value (and also knobs for the user to
change the default) not sure whether it's saner to just keep it silent as
before?
--
Peter Xu
next prev parent reply other threads:[~2022-12-16 15:47 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 [this message]
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
[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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