From: YiFei Zhu <zhuyifei1999@gmail.com>
To: Jann Horn <jannh@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
Giuseppe Scrivano <gscrivan@redhat.com>,
Will Drewry <wad@chromium.org>, Kees Cook <keescook@chromium.org>,
YiFei Zhu <yifeifz2@illinois.edu>,
kernel list <linux-kernel@vger.kernel.org>,
Linux Containers <containers@lists.linux-foundation.org>,
Tobin Feldman-Fitzthum <tobin@ibm.com>,
Hubertus Franke <frankeh@us.ibm.com>,
Andy Lutomirski <luto@amacapital.net>,
Valentin Rothberg <vrothber@redhat.com>,
Dimitrios Skarlatos <dskarlat@cs.cmu.edu>,
Jack Chen <jianyan2@illinois.edu>,
Josep Torrellas <torrella@illinois.edu>,
bpf <bpf@vger.kernel.org>, Tianyin Xu <tyxu@illinois.edu>
Subject: Re: [RFC PATCH seccomp 2/2] seccomp/cache: Cache filter results that allow syscalls
Date: Mon, 21 Sep 2020 17:50:55 -0500 [thread overview]
Message-ID: <CABqSeAROcwq0ZGzWaxyPm+LDHu6T_8CD7_1c-hdhaMikr_ECCA@mail.gmail.com> (raw)
In-Reply-To: <CAG48ez3k0_7Vev_O=uV_WVuUGK6BPA0RyrYXMYSDV4DTMMe26g@mail.gmail.com>
On Mon, Sep 21, 2020 at 1:09 PM Jann Horn <jannh@google.com> wrote:
>
> On Mon, Sep 21, 2020 at 7:35 AM YiFei Zhu <zhuyifei1999@gmail.com> wrote:
> [...]
> > We do this by creating a per-task bitmap of permitted syscalls.
> > If seccomp filter is invoked we check if it is cached and if so
> > directly return allow. Else we call into the cBPF filter, and if
> > the result is an allow then we cache the results.
>
> What? Why? We already have code to statically evaluate the filter for
> all syscall numbers. We should be using the results of that instead of
> re-running the filter and separately caching the results.
>
> > The cache is per-task
>
> Please don't. The static results are per-filter, so the bitmask(s)
> should also be per-filter and immutable.
I do agree that an immutable bitmask is faster and easier to reason
about its correctness. However, I did not find the "code to statically
evaluate the filter for all syscall numbers" while reading seccomp.c.
Would you give me a pointer to that and I will see how to best make
use of it?
YiFei Zhu
_______________________________________________
Containers mailing list
Containers@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/containers
WARNING: multiple messages have this Message-ID (diff)
From: YiFei Zhu <zhuyifei1999@gmail.com>
To: Jann Horn <jannh@google.com>
Cc: Linux Containers <containers@lists.linux-foundation.org>,
YiFei Zhu <yifeifz2@illinois.edu>, bpf <bpf@vger.kernel.org>,
Andrea Arcangeli <aarcange@redhat.com>,
Dimitrios Skarlatos <dskarlat@cs.cmu.edu>,
Giuseppe Scrivano <gscrivan@redhat.com>,
Hubertus Franke <frankeh@us.ibm.com>,
Jack Chen <jianyan2@illinois.edu>,
Josep Torrellas <torrella@illinois.edu>,
Kees Cook <keescook@chromium.org>, Tianyin Xu <tyxu@illinois.edu>,
Tobin Feldman-Fitzthum <tobin@ibm.com>,
Valentin Rothberg <vrothber@redhat.com>,
Andy Lutomirski <luto@amacapital.net>,
Will Drewry <wad@chromium.org>, Aleksa Sarai <cyphar@cyphar.com>,
kernel list <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH seccomp 2/2] seccomp/cache: Cache filter results that allow syscalls
Date: Mon, 21 Sep 2020 17:50:55 -0500 [thread overview]
Message-ID: <CABqSeAROcwq0ZGzWaxyPm+LDHu6T_8CD7_1c-hdhaMikr_ECCA@mail.gmail.com> (raw)
In-Reply-To: <CAG48ez3k0_7Vev_O=uV_WVuUGK6BPA0RyrYXMYSDV4DTMMe26g@mail.gmail.com>
On Mon, Sep 21, 2020 at 1:09 PM Jann Horn <jannh@google.com> wrote:
>
> On Mon, Sep 21, 2020 at 7:35 AM YiFei Zhu <zhuyifei1999@gmail.com> wrote:
> [...]
> > We do this by creating a per-task bitmap of permitted syscalls.
> > If seccomp filter is invoked we check if it is cached and if so
> > directly return allow. Else we call into the cBPF filter, and if
> > the result is an allow then we cache the results.
>
> What? Why? We already have code to statically evaluate the filter for
> all syscall numbers. We should be using the results of that instead of
> re-running the filter and separately caching the results.
>
> > The cache is per-task
>
> Please don't. The static results are per-filter, so the bitmask(s)
> should also be per-filter and immutable.
I do agree that an immutable bitmask is faster and easier to reason
about its correctness. However, I did not find the "code to statically
evaluate the filter for all syscall numbers" while reading seccomp.c.
Would you give me a pointer to that and I will see how to best make
use of it?
YiFei Zhu
next prev parent reply other threads:[~2020-09-21 22:51 UTC|newest]
Thread overview: 302+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-21 5:35 [RFC PATCH seccomp 0/2] seccomp: Add bitmap cache of arg-independent filter results that allow syscalls YiFei Zhu
2020-09-21 5:35 ` YiFei Zhu
2020-09-21 5:35 ` [RFC PATCH seccomp 1/2] seccomp/cache: Add "emulator" to check if filter is arg-dependent YiFei Zhu
2020-09-21 5:35 ` YiFei Zhu
2020-09-21 17:47 ` Jann Horn via Containers
2020-09-21 17:47 ` Jann Horn
2020-09-21 18:38 ` Jann Horn via Containers
2020-09-21 18:38 ` Jann Horn
2020-09-21 23:44 ` YiFei Zhu
2020-09-21 23:44 ` YiFei Zhu
2020-09-22 0:25 ` Jann Horn via Containers
2020-09-22 0:25 ` Jann Horn
2020-09-22 0:47 ` YiFei Zhu
2020-09-22 0:47 ` YiFei Zhu
2020-09-21 5:35 ` [RFC PATCH seccomp 2/2] seccomp/cache: Cache filter results that allow syscalls YiFei Zhu
2020-09-21 5:35 ` YiFei Zhu
2020-09-21 18:08 ` Jann Horn via Containers
2020-09-21 18:08 ` Jann Horn
2020-09-21 22:50 ` YiFei Zhu [this message]
2020-09-21 22:50 ` YiFei Zhu
2020-09-21 22:57 ` Jann Horn via Containers
2020-09-21 22:57 ` Jann Horn
2020-09-21 23:08 ` YiFei Zhu
2020-09-21 23:08 ` YiFei Zhu
2020-09-25 0:01 ` [PATCH v2 seccomp 2/6] asm/syscall.h: Add syscall_arches[] array Kees Cook
2020-09-25 0:01 ` Kees Cook
2020-09-25 0:15 ` Jann Horn via Containers
2020-09-25 0:15 ` Jann Horn
2020-09-25 0:18 ` Al Viro
2020-09-25 0:18 ` Al Viro
2020-09-25 0:24 ` Jann Horn via Containers
2020-09-25 0:24 ` Jann Horn
2020-09-25 1:27 ` YiFei Zhu
2020-09-25 1:27 ` YiFei Zhu
2020-09-25 3:09 ` Kees Cook
2020-09-25 3:09 ` Kees Cook
2020-09-25 3:28 ` YiFei Zhu
2020-09-25 3:28 ` YiFei Zhu
2020-09-25 16:39 ` YiFei Zhu
2020-09-25 16:39 ` YiFei Zhu
2020-09-21 5:48 ` [RFC PATCH seccomp 0/2] seccomp: Add bitmap cache of arg-independent filter results that allow syscalls Sargun Dhillon
2020-09-21 5:48 ` Sargun Dhillon
2020-09-21 7:13 ` YiFei Zhu
2020-09-21 7:13 ` YiFei Zhu
2020-09-21 8:30 ` Christian Brauner
2020-09-21 8:30 ` Christian Brauner
2020-09-21 8:44 ` YiFei Zhu
2020-09-21 8:44 ` YiFei Zhu
2020-09-21 13:51 ` Tycho Andersen
2020-09-21 13:51 ` Tycho Andersen
2020-09-21 15:27 ` YiFei Zhu
2020-09-21 15:27 ` YiFei Zhu
2020-09-21 16:39 ` Tycho Andersen
2020-09-21 16:39 ` Tycho Andersen
2020-09-21 22:57 ` YiFei Zhu
2020-09-21 22:57 ` YiFei Zhu
2020-09-21 19:16 ` Jann Horn via Containers
2020-09-21 19:16 ` Jann Horn
2020-09-21 19:35 ` Hubertus Franke
2020-09-21 19:45 ` Jann Horn via Containers
2020-09-21 19:45 ` Jann Horn
2020-09-23 19:26 ` Kees Cook
2020-09-23 19:26 ` Kees Cook
2020-09-23 22:54 ` YiFei Zhu
2020-09-23 22:54 ` YiFei Zhu
2020-09-24 6:52 ` Kees Cook
2020-09-24 6:52 ` Kees Cook
2020-09-24 12:06 ` [PATCH seccomp 0/6] " YiFei Zhu
2020-09-24 12:06 ` YiFei Zhu
2020-09-24 12:06 ` [PATCH seccomp 1/6] seccomp: Move config option SECCOMP to arch/Kconfig YiFei Zhu
2020-09-24 12:06 ` YiFei Zhu
2020-09-24 12:06 ` YiFei Zhu
2020-09-24 12:06 ` YiFei Zhu
2020-09-24 12:06 ` [PATCH seccomp 2/6] asm/syscall.h: Add syscall_arches[] array YiFei Zhu
2020-09-24 12:06 ` YiFei Zhu
2020-09-24 12:06 ` [PATCH seccomp 3/6] seccomp/cache: Add "emulator" to check if filter is arg-dependent YiFei Zhu
2020-09-24 12:06 ` YiFei Zhu
2020-09-24 12:06 ` [PATCH seccomp 4/6] seccomp/cache: Lookup syscall allowlist for fast path YiFei Zhu
2020-09-24 12:06 ` YiFei Zhu
2020-09-24 12:06 ` [PATCH seccomp 5/6] selftests/seccomp: Compare bitmap vs filter overhead YiFei Zhu
2020-09-24 12:06 ` YiFei Zhu
2020-09-24 12:06 ` [PATCH seccomp 6/6] seccomp/cache: Report cache data through /proc/pid/seccomp_cache YiFei Zhu
2020-09-24 12:06 ` YiFei Zhu
2020-09-24 12:44 ` [PATCH v2 seccomp 0/6] seccomp: Add bitmap cache of arg-independent filter results that allow syscalls YiFei Zhu
2020-09-24 12:44 ` YiFei Zhu
2020-09-24 12:44 ` [PATCH v2 seccomp 1/6] seccomp: Move config option SECCOMP to arch/Kconfig YiFei Zhu
2020-09-24 12:44 ` YiFei Zhu
2020-09-24 19:11 ` Kees Cook
2020-09-24 19:11 ` Kees Cook
2020-10-27 9:52 ` Geert Uytterhoeven
2020-10-27 9:52 ` Geert Uytterhoeven
2020-10-27 19:08 ` YiFei Zhu
2020-10-27 19:08 ` YiFei Zhu
2020-10-28 0:06 ` Kees Cook
2020-10-28 0:06 ` Kees Cook
2020-10-28 8:18 ` Geert Uytterhoeven
2020-10-28 8:18 ` Geert Uytterhoeven
2020-10-28 9:34 ` Jann Horn via Containers
2020-10-28 9:34 ` Jann Horn
2020-09-24 12:44 ` [PATCH v2 seccomp 2/6] asm/syscall.h: Add syscall_arches[] array YiFei Zhu
2020-09-24 12:44 ` YiFei Zhu
2020-09-24 13:47 ` David Laight
2020-09-24 13:47 ` David Laight
2020-09-24 14:16 ` YiFei Zhu
2020-09-24 14:16 ` YiFei Zhu
2020-09-24 14:20 ` David Laight
2020-09-24 14:20 ` David Laight
2020-09-24 14:37 ` YiFei Zhu
2020-09-24 14:37 ` YiFei Zhu
2020-09-24 16:02 ` YiFei Zhu
2020-09-24 16:02 ` YiFei Zhu
2020-09-24 12:44 ` [PATCH v2 seccomp 3/6] seccomp/cache: Add "emulator" to check if filter is arg-dependent YiFei Zhu
2020-09-24 12:44 ` YiFei Zhu
2020-09-24 23:25 ` Kees Cook
2020-09-24 23:25 ` Kees Cook
2020-09-25 3:04 ` YiFei Zhu
2020-09-25 3:04 ` YiFei Zhu
2020-09-25 16:45 ` YiFei Zhu
2020-09-25 16:45 ` YiFei Zhu
2020-09-25 19:42 ` Kees Cook
2020-09-25 19:42 ` Kees Cook
2020-09-25 19:51 ` Andy Lutomirski
2020-09-25 19:51 ` Andy Lutomirski
2020-09-25 20:37 ` Kees Cook
2020-09-25 20:37 ` Kees Cook
2020-09-25 21:07 ` Andy Lutomirski
2020-09-25 21:07 ` Andy Lutomirski
2020-09-25 23:49 ` Kees Cook
2020-09-25 23:49 ` Kees Cook
2020-09-26 0:34 ` Andy Lutomirski
2020-09-26 0:34 ` Andy Lutomirski
2020-09-26 1:23 ` YiFei Zhu
2020-09-26 1:23 ` YiFei Zhu
2020-09-26 2:47 ` Andy Lutomirski
2020-09-26 2:47 ` Andy Lutomirski
2020-09-26 4:35 ` Kees Cook
2020-09-26 4:35 ` Kees Cook
2020-09-24 12:44 ` [PATCH v2 seccomp 4/6] seccomp/cache: Lookup syscall allowlist for fast path YiFei Zhu
2020-09-24 12:44 ` YiFei Zhu
2020-09-24 23:46 ` Kees Cook
2020-09-24 23:46 ` Kees Cook
2020-09-25 1:55 ` YiFei Zhu
2020-09-25 1:55 ` YiFei Zhu
2020-09-24 12:44 ` [PATCH v2 seccomp 5/6] selftests/seccomp: Compare bitmap vs filter overhead YiFei Zhu
2020-09-24 12:44 ` YiFei Zhu
2020-09-24 23:47 ` Kees Cook
2020-09-24 23:47 ` Kees Cook
2020-09-25 1:35 ` YiFei Zhu
2020-09-25 1:35 ` YiFei Zhu
2020-09-24 12:44 ` [PATCH v2 seccomp 6/6] seccomp/cache: Report cache data through /proc/pid/seccomp_cache YiFei Zhu
2020-09-24 12:44 ` YiFei Zhu
2020-09-24 23:56 ` Kees Cook
2020-09-24 23:56 ` Kees Cook
2020-09-25 3:11 ` YiFei Zhu
2020-09-25 3:11 ` YiFei Zhu
2020-09-25 3:26 ` Kees Cook
2020-09-25 3:26 ` Kees Cook
2020-09-30 15:19 ` [PATCH v3 seccomp 0/5] seccomp: Add bitmap cache of constant allow filter results YiFei Zhu
2020-09-30 15:19 ` YiFei Zhu
2020-09-30 15:19 ` [PATCH v3 seccomp 1/5] x86: Enable seccomp architecture tracking YiFei Zhu
2020-09-30 15:19 ` YiFei Zhu
2020-09-30 21:21 ` Kees Cook
2020-09-30 21:21 ` Kees Cook
2020-09-30 21:33 ` Jann Horn via Containers
2020-09-30 21:33 ` Jann Horn
2020-09-30 22:53 ` Kees Cook
2020-09-30 22:53 ` Kees Cook
2020-09-30 23:15 ` Jann Horn via Containers
2020-09-30 23:15 ` Jann Horn
2020-09-30 15:19 ` [PATCH v3 seccomp 2/5] seccomp/cache: Add "emulator" to check if filter is constant allow YiFei Zhu
2020-09-30 15:19 ` YiFei Zhu
2020-09-30 22:24 ` Jann Horn via Containers
2020-09-30 22:24 ` Jann Horn
2020-09-30 22:49 ` Kees Cook
2020-09-30 22:49 ` Kees Cook
2020-10-01 11:28 ` YiFei Zhu
2020-10-01 11:28 ` YiFei Zhu
2020-10-01 21:08 ` Jann Horn via Containers
2020-10-01 21:08 ` Jann Horn
2020-09-30 22:40 ` Kees Cook
2020-09-30 22:40 ` Kees Cook
2020-10-01 11:52 ` YiFei Zhu
2020-10-01 11:52 ` YiFei Zhu
2020-10-01 21:05 ` Kees Cook
2020-10-01 21:05 ` Kees Cook
2020-10-02 11:08 ` YiFei Zhu
2020-10-02 11:08 ` YiFei Zhu
2020-10-09 4:47 ` YiFei Zhu
2020-10-09 4:47 ` YiFei Zhu
2020-10-09 5:41 ` Kees Cook
2020-10-09 5:41 ` Kees Cook
2020-09-30 15:19 ` [PATCH v3 seccomp 3/5] seccomp/cache: Lookup syscall allowlist for fast path YiFei Zhu
2020-09-30 15:19 ` YiFei Zhu
2020-09-30 21:32 ` Kees Cook
2020-09-30 21:32 ` Kees Cook
2020-10-09 0:17 ` YiFei Zhu
2020-10-09 0:17 ` YiFei Zhu
2020-10-09 5:35 ` Kees Cook
2020-10-09 5:35 ` Kees Cook
2020-09-30 15:19 ` [PATCH v3 seccomp 4/5] selftests/seccomp: Compare bitmap vs filter overhead YiFei Zhu
2020-09-30 15:19 ` YiFei Zhu
2020-09-30 15:19 ` [PATCH v3 seccomp 5/5] seccomp/cache: Report cache data through /proc/pid/seccomp_cache YiFei Zhu
2020-09-30 15:19 ` YiFei Zhu
2020-09-30 22:00 ` Jann Horn via Containers
2020-09-30 22:00 ` Jann Horn
2020-09-30 23:12 ` Kees Cook
2020-09-30 23:12 ` Kees Cook
2020-10-01 12:06 ` YiFei Zhu
2020-10-01 12:06 ` YiFei Zhu
2020-10-01 16:05 ` Jann Horn via Containers
2020-10-01 16:05 ` Jann Horn
2020-10-01 16:18 ` YiFei Zhu
2020-10-01 16:18 ` YiFei Zhu
2020-09-30 22:59 ` Kees Cook
2020-09-30 22:59 ` Kees Cook
2020-09-30 23:08 ` Jann Horn via Containers
2020-09-30 23:08 ` Jann Horn
2020-09-30 23:21 ` Kees Cook
2020-09-30 23:21 ` Kees Cook
2020-10-09 17:14 ` [PATCH v4 seccomp 0/5] seccomp: Add bitmap cache of constant allow filter results YiFei Zhu
2020-10-09 17:14 ` YiFei Zhu
2020-10-09 17:14 ` [PATCH v4 seccomp 1/5] seccomp/cache: Lookup syscall allowlist bitmap for fast path YiFei Zhu
2020-10-09 17:14 ` YiFei Zhu
2020-10-09 21:30 ` Jann Horn via Containers
2020-10-09 21:30 ` Jann Horn
2020-10-09 23:18 ` Kees Cook
2020-10-09 23:18 ` Kees Cook
2020-10-09 17:14 ` [PATCH v4 seccomp 2/5] seccomp/cache: Add "emulator" to check if filter is constant allow YiFei Zhu
2020-10-09 17:14 ` YiFei Zhu
2020-10-09 21:30 ` Jann Horn via Containers
2020-10-09 21:30 ` Jann Horn
2020-10-09 22:47 ` Kees Cook
2020-10-09 22:47 ` Kees Cook
2020-10-09 17:14 ` [PATCH v4 seccomp 3/5] x86: Enable seccomp architecture tracking YiFei Zhu
2020-10-09 17:14 ` YiFei Zhu
2020-10-09 17:25 ` Andy Lutomirski
2020-10-09 17:25 ` Andy Lutomirski
2020-10-09 18:32 ` YiFei Zhu
2020-10-09 18:32 ` YiFei Zhu
2020-10-09 20:59 ` Andy Lutomirski
2020-10-09 20:59 ` Andy Lutomirski
2020-10-09 17:14 ` [PATCH v4 seccomp 4/5] selftests/seccomp: Compare bitmap vs filter overhead YiFei Zhu
2020-10-09 17:14 ` YiFei Zhu
2020-10-09 17:14 ` [PATCH v4 seccomp 5/5] seccomp/cache: Report cache data through /proc/pid/seccomp_cache YiFei Zhu
2020-10-09 17:14 ` YiFei Zhu
2020-10-09 21:24 ` kernel test robot
2020-10-09 21:24 ` kernel test robot
2020-10-09 21:24 ` kernel test robot
2020-10-09 21:45 ` Jann Horn via Containers
2020-10-09 21:45 ` Jann Horn
2020-10-09 23:14 ` Kees Cook
2020-10-09 23:14 ` Kees Cook
2020-10-10 13:26 ` YiFei Zhu
2020-10-10 13:26 ` YiFei Zhu
2020-10-12 22:57 ` Kees Cook
2020-10-12 22:57 ` Kees Cook
2020-10-13 0:31 ` YiFei Zhu
2020-10-13 0:31 ` YiFei Zhu
2020-10-22 20:52 ` YiFei Zhu
2020-10-22 20:52 ` YiFei Zhu
2020-10-22 22:32 ` Kees Cook
2020-10-22 22:32 ` Kees Cook
2020-10-22 23:40 ` YiFei Zhu
2020-10-22 23:40 ` YiFei Zhu
2020-10-24 2:51 ` Kees Cook
2020-10-24 2:51 ` Kees Cook
2020-10-30 12:18 ` YiFei Zhu
2020-10-30 12:18 ` YiFei Zhu
2020-11-03 13:00 ` YiFei Zhu
2020-11-03 13:00 ` YiFei Zhu
2020-11-04 0:29 ` Kees Cook
2020-11-04 0:29 ` Kees Cook
2020-11-04 11:40 ` YiFei Zhu
2020-11-04 11:40 ` YiFei Zhu
2020-11-04 18:57 ` Kees Cook
2020-11-04 18:57 ` Kees Cook
2020-10-11 15:47 ` [PATCH v5 seccomp 0/5]seccomp: Add bitmap cache of constant allow filter results YiFei Zhu
2020-10-11 15:47 ` YiFei Zhu
2020-10-11 15:47 ` [PATCH v5 seccomp 1/5] seccomp/cache: Lookup syscall allowlist bitmap for fast path YiFei Zhu
2020-10-11 15:47 ` YiFei Zhu
2020-10-12 6:42 ` Jann Horn via Containers
2020-10-12 6:42 ` Jann Horn
2020-10-11 15:47 ` [PATCH v5 seccomp 2/5] seccomp/cache: Add "emulator" to check if filter is constant allow YiFei Zhu
2020-10-11 15:47 ` YiFei Zhu
2020-10-12 6:46 ` Jann Horn via Containers
2020-10-12 6:46 ` Jann Horn
2020-10-11 15:47 ` [PATCH v5 seccomp 3/5] x86: Enable seccomp architecture tracking YiFei Zhu
2020-10-11 15:47 ` YiFei Zhu
2020-10-11 15:47 ` [PATCH v5 seccomp 4/5] selftests/seccomp: Compare bitmap vs filter overhead YiFei Zhu
2020-10-11 15:47 ` YiFei Zhu
2020-10-11 15:47 ` [PATCH v5 seccomp 5/5] seccomp/cache: Report cache data through /proc/pid/seccomp_cache YiFei Zhu
2020-10-11 15:47 ` YiFei Zhu
2020-10-12 6:49 ` Jann Horn via Containers
2020-10-12 6:49 ` Jann Horn
2020-12-17 12:14 ` Geert Uytterhoeven
2020-12-17 12:14 ` Geert Uytterhoeven
2020-12-17 18:34 ` YiFei Zhu
2020-12-17 18:34 ` YiFei Zhu
2020-12-18 12:35 ` Geert Uytterhoeven
2020-12-18 12:35 ` Geert Uytterhoeven
2020-10-27 19:14 ` [PATCH v5 seccomp 0/5]seccomp: Add bitmap cache of constant allow filter results Kees Cook
2020-10-27 19:14 ` Kees Cook
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