From: David Laight <David.Laight@ACULAB.COM>
To: 'YiFei Zhu' <zhuyifei1999@gmail.com>,
"containers@lists.linux-foundation.org"
<containers@lists.linux-foundation.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>,
Giuseppe Scrivano <gscrivan@redhat.com>,
Valentin Rothberg <vrothber@redhat.com>,
Kees Cook <keescook@chromium.org>, Jann Horn <jannh@google.com>,
YiFei Zhu <yifeifz2@illinois.edu>,
Tobin Feldman-Fitzthum <tobin@ibm.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Andy Lutomirski <luto@amacapital.net>,
Hubertus Franke <frankeh@us.ibm.com>,
Jack Chen <jianyan2@illinois.edu>,
Dimitrios Skarlatos <dskarlat@cs.cmu.edu>,
Josep Torrellas <torrella@illinois.edu>,
Will Drewry <wad@chromium.org>,
"bpf@vger.kernel.org" <bpf@vger.kernel.org>,
Tianyin Xu <tyxu@illinois.edu>
Subject: RE: [PATCH v2 seccomp 2/6] asm/syscall.h: Add syscall_arches[] array
Date: Thu, 24 Sep 2020 13:47:54 +0000 [thread overview]
Message-ID: <7042ba3307b34ce3b95e5fede823514e@AcuMS.aculab.com> (raw)
In-Reply-To: <20bbc8ed4b9f2c83d0f67f37955eb2d789268525.1600951211.git.yifeifz2@illinois.edu>
From: YiFei Zhu
> Sent: 24 September 2020 13:44
>
> Seccomp cache emulator needs to know all the architecture numbers
> that syscall_get_arch() could return for the kernel build in order
> to generate a cache for all of them.
>
> The array is declared in header as static __maybe_unused const
> to maximize compiler optimiation opportunities such as loop
> unrolling.
I doubt the compiler will do what you want.
Looking at it, in most cases there are one or two entries.
I think only MIPS has three.
So a static inline function that contains a list of
conditionals will generate better code that any kind of
array lookup.
For x86-64 you end up with something like:
#ifdef CONFIG_IA32_EMULATION
if (sd->arch == AUDIT_ARCH_I386) return xxx;
#endif
return yyy;
Probably saves you having multiple arrays that need to be
kept carefully in step.
David
-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)
_______________________________________________
Containers mailing list
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WARNING: multiple messages have this Message-ID (diff)
From: David Laight <David.Laight@ACULAB.COM>
To: 'YiFei Zhu' <zhuyifei1999@gmail.com>,
"containers@lists.linux-foundation.org"
<containers@lists.linux-foundation.org>
Cc: YiFei Zhu <yifeifz2@illinois.edu>,
"bpf@vger.kernel.org" <bpf@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Aleksa Sarai <cyphar@cyphar.com>,
"Andrea Arcangeli" <aarcange@redhat.com>,
Andy Lutomirski <luto@amacapital.net>,
Dimitrios Skarlatos <dskarlat@cs.cmu.edu>,
Giuseppe Scrivano <gscrivan@redhat.com>,
Hubertus Franke <frankeh@us.ibm.com>,
Jack Chen <jianyan2@illinois.edu>, Jann Horn <jannh@google.com>,
Josep Torrellas <torrella@illinois.edu>,
Kees Cook <keescook@chromium.org>, Tianyin Xu <tyxu@illinois.edu>,
Tobin Feldman-Fitzthum <tobin@ibm.com>,
Tycho Andersen <tycho@tycho.pizza>,
Valentin Rothberg <vrothber@redhat.com>,
Will Drewry <wad@chromium.org>
Subject: RE: [PATCH v2 seccomp 2/6] asm/syscall.h: Add syscall_arches[] array
Date: Thu, 24 Sep 2020 13:47:54 +0000 [thread overview]
Message-ID: <7042ba3307b34ce3b95e5fede823514e@AcuMS.aculab.com> (raw)
In-Reply-To: <20bbc8ed4b9f2c83d0f67f37955eb2d789268525.1600951211.git.yifeifz2@illinois.edu>
From: YiFei Zhu
> Sent: 24 September 2020 13:44
>
> Seccomp cache emulator needs to know all the architecture numbers
> that syscall_get_arch() could return for the kernel build in order
> to generate a cache for all of them.
>
> The array is declared in header as static __maybe_unused const
> to maximize compiler optimiation opportunities such as loop
> unrolling.
I doubt the compiler will do what you want.
Looking at it, in most cases there are one or two entries.
I think only MIPS has three.
So a static inline function that contains a list of
conditionals will generate better code that any kind of
array lookup.
For x86-64 you end up with something like:
#ifdef CONFIG_IA32_EMULATION
if (sd->arch == AUDIT_ARCH_I386) return xxx;
#endif
return yyy;
Probably saves you having multiple arrays that need to be
kept carefully in step.
David
-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)
next prev parent reply other threads:[~2020-09-24 13:48 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
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 [this message]
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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