From: John Allen <john.allen@amd.com>
To: Nathan Chancellor <nathan@kernel.org>, Kees Cook <keescook@chromium.org>
Cc: Dave Hansen <dave.hansen@intel.com>,
"Gustavo A. R. Silva" <gustavoars@kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
x86@kernel.org, "H . Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-mm@kvack.org, linux-arch@vger.kernel.org,
linux-api@vger.kernel.org, Arnd Bergmann <arnd@arndb.de>,
Andy Lutomirski <luto@kernel.org>,
Balbir Singh <bsingharora@gmail.com>,
Borislav Petkov <bp@alien8.de>,
Cyrill Gorcunov <gorcunov@gmail.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Eugene Syromiatnikov <esyr@redhat.com>,
Florian Weimer <fweimer@redhat.com>,
"H . J . Lu" <hjl.tools@gmail.com>, Jann Horn <jannh@google.com>,
Jonathan Corbet <corbet@lwn.net>,
Mike Kravetz <mike.kravetz@oracle.com>,
Nadav Amit <nadav.amit@gmail.com>,
Oleg Nesterov <oleg@redhat.com>, Pavel Machek <pavel@ucw.cz>,
Peter Zijlstra <peterz@infradead.org>,
Randy Dunlap <rdunlap@infradead.org>,
"Ravi V . Shankar" <ravi.v.shankar@intel.com>,
Weijiang Yang <weijiang.yang@intel.com>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
joao.moreira@intel.com, kcc@google.com, eranian@google.com,
rppt@kernel.org, jamorris@linux.microsoft.com,
dethoma@microsoft.com, Tom Lendacky <thomas.lendacky@amd.com>,
"Moger, Babu" <babu.moger@amd.com>
Subject: Re: [PATCH v2 33/39] x86/cpufeatures: Limit shadow stack to Intel CPUs
Date: Tue, 4 Oct 2022 14:43:19 -0500 [thread overview]
Message-ID: <ae5fea4b-8c33-c523-9d6d-3f27a9ae03d0@amd.com> (raw)
In-Reply-To: <YzxViiyfMRKrmoMY@dev-arch.thelio-3990X>
On 10/4/22 10:47 AM, Nathan Chancellor wrote:
> Hi Kees,
>
> On Mon, Oct 03, 2022 at 09:54:26PM -0700, Kees Cook wrote:
>> On Mon, Oct 03, 2022 at 05:09:04PM -0700, Dave Hansen wrote:
>>> On 10/3/22 16:57, Kees Cook wrote:
>>>> On Thu, Sep 29, 2022 at 03:29:30PM -0700, Rick Edgecombe wrote:
>>>>> Shadow stack is supported on newer AMD processors, but the kernel
>>>>> implementation has not been tested on them. Prevent basic issues from
>>>>> showing up for normal users by disabling shadow stack on all CPUs except
>>>>> Intel until it has been tested. At which point the limitation should be
>>>>> removed.
>>>>>
>>>>> Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
>>>> So running the selftests on an AMD system is sufficient to drop this
>>>> patch?
>>>
>>> Yes, that's enough.
>>>
>>> I _thought_ the AMD folks provided some tested-by's at some point in the
>>> past. But, maybe I'm confusing this for one of the other shared
>>> features. Either way, I'm sure no tested-by's were dropped on purpose.
>>>
>>> I'm sure Rick is eager to trim down his series and this would be a great
>>> patch to drop. Does anyone want to make that easy for Rick?
>>>
>>> <hint> <hint>
>>
>> Hey Gustavo, Nathan, or Nick! I know y'all have some fancy AMD testing
>> rigs. Got a moment to spin up this series and run the selftests? :)
>
> I do have access to a system with an EPYC 7513, which does have Shadow
> Stack support (I can see 'shstk' in the "Flags" section of lscpu with
> this series). As far as I understand it, AMD only added Shadow Stack
> with Zen 3; my regular AMD test system is Zen 2 (probably should look at
> procurring a Zen 3 or Zen 4 one at some point).
>
> I applied this series on top of 6.0 and reverted this change then booted
> it on that system. After building the selftest (which did require
> 'make headers_install' and a small addition to make it build beyond
> that, see below), I ran it and this was the result. I am not sure if
> that is expected or not but the other results seem promising for
> dropping this patch.
>
> $ ./test_shadow_stack_64
> [INFO] new_ssp = 7f8a36c9fff8, *new_ssp = 7f8a36ca0001
> [INFO] changing ssp from 7f8a374a0ff0 to 7f8a36c9fff8
> [INFO] ssp is now 7f8a36ca0000
> [OK] Shadow stack pivot
> [OK] Shadow stack faults
> [INFO] Corrupting shadow stack
> [INFO] Generated shadow stack violation successfully
> [OK] Shadow stack violation test
> [INFO] Gup read -> shstk access success
> [INFO] Gup write -> shstk access success
> [INFO] Violation from normal write
> [INFO] Gup read -> write access success
> [INFO] Violation from normal write
> [INFO] Gup write -> write access success
> [INFO] Cow gup write -> write access success
> [OK] Shadow gup test
> [INFO] Violation from shstk access
> [OK] mprotect() test
> [OK] Userfaultfd test
> [FAIL] Alt shadow stack test
The selftest is looking OK on my system (Dell PowerEdge R6515 w/ EPYC
7713). I also just pulled a fresh 6.0 kernel and applied the series
including the fix Nathan mentions below.
$ tools/testing/selftests/x86/test_shadow_stack_64
[INFO] new_ssp = 7f30cccc5ff8, *new_ssp = 7f30cccc6001
[INFO] changing ssp from 7f30cd4c6ff0 to 7f30cccc5ff8
[INFO] ssp is now 7f30cccc6000
[OK] Shadow stack pivot
[OK] Shadow stack faults
[INFO] Corrupting shadow stack
[INFO] Generated shadow stack violation successfully
[OK] Shadow stack violation test
[INFO] Gup read -> shstk access success
[INFO] Gup write -> shstk access success
[INFO] Violation from normal write
[INFO] Gup read -> write access success
[INFO] Violation from normal write
[INFO] Gup write -> write access success
[INFO] Cow gup write -> write access success
[OK] Shadow gup test
[INFO] Violation from shstk access
[OK] mprotect() test
[OK] Userfaultfd test
[OK] Alt shadow stack test.
>
> $ echo $?
> 1
>
> I am happy to provide any information that would be useful for exploring
> this failure and test further iterations of this series as necessary.
>
> Cheers,
> Nathan
>
> test_shadow_stack.c: In function ‘create_shstk’:
> test_shadow_stack.c:86:70: error: ‘SHADOW_STACK_SET_TOKEN’ undeclared (first use in this function)
> 86 | return (void *)syscall(__NR_map_shadow_stack, addr, SS_SIZE, SHADOW_STACK_SET_TOKEN);
> | ^~~~~~~~~~~~~~~~~~~~~~
> test_shadow_stack.c:86:70: note: each undeclared identifier is reported only once for each function it appears in
> test_shadow_stack.c:87:1: warning: control reaches end of non-void function [-Wreturn-type]
> 87 | }
> | ^
>
> diff --git a/tools/testing/selftests/x86/test_shadow_stack.c b/tools/testing/selftests/x86/test_shadow_stack.c
> index 22b856de5cdd..958dbb248518 100644
> --- a/tools/testing/selftests/x86/test_shadow_stack.c
> +++ b/tools/testing/selftests/x86/test_shadow_stack.c
> @@ -11,6 +11,7 @@
> #define _GNU_SOURCE
>
> #include <sys/syscall.h>
> +#include <asm/mman.h>
> #include <sys/mman.h>
> #include <sys/stat.h>
> #include <sys/wait.h>
next prev parent reply other threads:[~2022-10-04 19:43 UTC|newest]
Thread overview: 241+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-29 22:28 [PATCH v2 00/39] Shadowstacks for userspace Rick Edgecombe
2022-09-29 22:28 ` [PATCH v2 01/39] Documentation/x86: Add CET description Rick Edgecombe
2022-09-30 3:41 ` Bagas Sanjaya
2022-09-30 13:33 ` Jonathan Corbet
2022-09-30 13:41 ` Bagas Sanjaya
2022-10-03 16:56 ` Edgecombe, Rick P
2022-10-04 2:16 ` Bagas Sanjaya
2022-10-05 9:10 ` Peter Zijlstra
2022-10-05 9:25 ` Bagas Sanjaya
2022-10-05 9:46 ` Peter Zijlstra
2022-10-03 19:35 ` John Hubbard
2022-10-03 19:39 ` Dave Hansen
2022-10-04 2:13 ` Bagas Sanjaya
2022-10-03 17:18 ` Kees Cook
2022-10-03 19:46 ` Edgecombe, Rick P
2022-10-05 0:02 ` Andrew Cooper
2022-10-10 12:19 ` Florian Weimer
2022-10-10 16:44 ` Edgecombe, Rick P
2022-10-10 16:51 ` H.J. Lu
2022-10-12 12:29 ` Florian Weimer
2022-10-12 15:59 ` Dave Hansen
2022-10-12 16:54 ` Florian Weimer
2022-10-13 21:28 ` Edgecombe, Rick P
2022-10-13 22:15 ` H.J. Lu
2022-10-26 21:59 ` Edgecombe, Rick P
2022-09-29 22:28 ` [PATCH v2 02/39] x86/cet/shstk: Add Kconfig option for Shadow Stack Rick Edgecombe
2022-10-03 13:40 ` Kirill A . Shutemov
2022-10-03 19:53 ` Edgecombe, Rick P
2022-10-03 17:25 ` Kees Cook
2022-10-03 19:52 ` Edgecombe, Rick P
2022-10-03 19:42 ` Dave Hansen
2022-10-03 19:50 ` Edgecombe, Rick P
2022-10-12 20:04 ` Borislav Petkov
2022-10-13 0:31 ` Edgecombe, Rick P
2022-10-13 9:21 ` Borislav Petkov
2022-09-29 22:29 ` [PATCH v2 03/39] x86/cpufeatures: Add CPU feature flags for shadow stacks Rick Edgecombe
2022-10-03 17:26 ` Kees Cook
2022-10-14 16:20 ` Borislav Petkov
2022-10-14 19:35 ` Edgecombe, Rick P
2022-09-29 22:29 ` [PATCH v2 04/39] x86/cpufeatures: Enable CET CR4 bit for shadow stack Rick Edgecombe
2022-10-03 17:31 ` Kees Cook
2022-10-05 0:55 ` Andrew Cooper
2022-10-14 17:12 ` Borislav Petkov
2022-10-14 18:15 ` Edgecombe, Rick P
2022-10-14 19:44 ` Borislav Petkov
2022-09-29 22:29 ` [PATCH v2 05/39] x86/fpu/xstate: Introduce CET MSR and XSAVES supervisor states Rick Edgecombe
2022-10-03 17:40 ` Kees Cook
2022-10-15 9:46 ` Borislav Petkov
2022-10-17 18:57 ` Edgecombe, Rick P
2022-10-17 19:33 ` Borislav Petkov
2022-09-29 22:29 ` [PATCH v2 06/39] x86/fpu: Add helper for modifying xstate Rick Edgecombe
2022-10-03 17:48 ` Kees Cook
2022-10-03 20:05 ` Edgecombe, Rick P
2022-10-04 4:05 ` Kees Cook
2022-10-04 14:18 ` Dave Hansen
2022-10-04 16:13 ` Edgecombe, Rick P
2022-09-29 22:29 ` [PATCH v2 07/39] x86/cet: Add user control-protection fault handler Rick Edgecombe
2022-10-03 14:01 ` Kirill A . Shutemov
2022-10-03 18:12 ` Edgecombe, Rick P
2022-10-03 18:04 ` Kees Cook
2022-10-03 20:33 ` Edgecombe, Rick P
2022-10-03 22:51 ` Andy Lutomirski
2022-10-03 23:09 ` H. Peter Anvin
2022-10-03 23:11 ` Edgecombe, Rick P
2022-10-05 1:20 ` Andrew Cooper
2022-10-05 22:44 ` Edgecombe, Rick P
2022-10-05 9:39 ` Peter Zijlstra
2022-10-05 22:45 ` Edgecombe, Rick P
2022-09-29 22:29 ` [PATCH v2 08/39] x86/mm: Remove _PAGE_DIRTY from kernel RO pages Rick Edgecombe
2022-10-03 14:17 ` Kirill A . Shutemov
2022-10-05 1:31 ` Andrew Cooper
2022-10-05 11:16 ` Peter Zijlstra
2022-10-05 12:34 ` Andrew Cooper
2022-09-29 22:29 ` [PATCH v2 09/39] x86/mm: Move pmd_write(), pud_write() up in the file Rick Edgecombe
2022-10-03 18:06 ` Kees Cook
2022-09-29 22:29 ` [PATCH v2 10/39] x86/mm: Introduce _PAGE_COW Rick Edgecombe
2022-09-30 15:16 ` Jann Horn
2022-10-06 16:10 ` Edgecombe, Rick P
2022-10-03 16:26 ` Kirill A . Shutemov
2022-10-03 21:36 ` Edgecombe, Rick P
2022-10-03 21:54 ` Jann Horn
2022-10-03 22:20 ` Edgecombe, Rick P
2022-10-03 22:14 ` Dave Hansen
2022-10-05 2:17 ` Andrew Cooper
2022-10-05 14:08 ` Dave Hansen
2022-10-05 23:06 ` Edgecombe, Rick P
2022-10-05 23:01 ` Edgecombe, Rick P
2022-10-05 11:33 ` Peter Zijlstra
2022-10-14 9:41 ` Peter Zijlstra
2022-10-14 15:52 ` Edgecombe, Rick P
2022-10-14 9:42 ` Peter Zijlstra
2022-10-14 18:06 ` Edgecombe, Rick P
2022-09-29 22:29 ` [PATCH v2 11/39] x86/mm: Update pte_modify for _PAGE_COW Rick Edgecombe
2022-09-29 22:29 ` [PATCH v2 12/39] x86/mm: Update ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to _PAGE_COW Rick Edgecombe
2022-10-03 17:43 ` Kirill A . Shutemov
2022-10-03 18:11 ` Nadav Amit
2022-10-03 18:51 ` Dave Hansen
2022-10-03 22:28 ` Edgecombe, Rick P
2022-10-03 23:17 ` Nadav Amit
2022-10-03 23:20 ` Nadav Amit
2022-10-03 23:25 ` Nadav Amit
2022-10-03 23:38 ` Edgecombe, Rick P
2022-10-04 0:40 ` Nadav Amit
2022-09-29 22:29 ` [PATCH v2 13/39] mm: Move VM_UFFD_MINOR_BIT from 37 to 38 Rick Edgecombe
2022-10-03 18:11 ` Kees Cook
2022-10-03 18:24 ` Peter Xu
2022-09-29 22:29 ` [PATCH v2 14/39] mm: Introduce VM_SHADOW_STACK for shadow stack memory Rick Edgecombe
2022-10-03 17:47 ` Kirill A . Shutemov
2022-10-04 0:29 ` Edgecombe, Rick P
2022-10-03 18:17 ` Kees Cook
2022-09-29 22:29 ` [PATCH v2 15/39] x86/mm: Check Shadow Stack page fault errors Rick Edgecombe
2022-10-03 18:20 ` Kees Cook
2022-10-14 10:07 ` Peter Zijlstra
2022-10-14 15:51 ` Edgecombe, Rick P
2022-09-29 22:29 ` [PATCH v2 16/39] x86/mm: Update maybe_mkwrite() for shadow stack Rick Edgecombe
2022-10-03 18:22 ` Kees Cook
2022-10-03 23:53 ` Kirill A . Shutemov
2022-10-14 15:32 ` Peter Zijlstra
2022-10-14 15:45 ` Edgecombe, Rick P
2022-09-29 22:29 ` [PATCH v2 17/39] mm: Fixup places that call pte_mkwrite() directly Rick Edgecombe
2022-10-03 18:24 ` Kees Cook
2022-10-03 23:56 ` Kirill A . Shutemov
2022-10-04 16:15 ` Edgecombe, Rick P
2022-10-04 1:56 ` Nadav Amit
2022-10-04 16:21 ` Edgecombe, Rick P
2022-10-14 15:52 ` Peter Zijlstra
2022-10-14 15:56 ` Edgecombe, Rick P
2022-09-29 22:29 ` [PATCH v2 18/39] mm: Add guard pages around a shadow stack Rick Edgecombe
2022-10-03 18:30 ` Kees Cook
2022-10-05 2:30 ` Andrew Cooper
2022-10-10 12:33 ` Florian Weimer
2022-10-10 13:32 ` Andrew Cooper
2022-10-10 13:40 ` Florian Weimer
2022-10-10 13:56 ` Andrew Cooper
2022-09-29 22:29 ` [PATCH v2 19/39] mm/mmap: Add shadow stack pages to memory accounting Rick Edgecombe
2022-10-03 18:31 ` Kees Cook
2022-10-04 0:03 ` Kirill A . Shutemov
2022-10-04 0:32 ` Edgecombe, Rick P
2022-09-29 22:29 ` [PATCH v2 20/39] mm/mprotect: Exclude shadow stack from preserve_write Rick Edgecombe
2022-09-29 22:29 ` [PATCH v2 21/39] mm: Re-introduce vm_flags to do_mmap() Rick Edgecombe
2022-09-29 22:29 ` [PATCH v2 22/39] mm: Don't allow write GUPs to shadow stack memory Rick Edgecombe
2022-09-30 19:16 ` Dave Hansen
2022-09-30 20:30 ` Edgecombe, Rick P
2022-09-30 20:37 ` Dave Hansen
2022-09-30 23:00 ` Jann Horn
2022-09-30 23:02 ` Jann Horn
2022-09-30 23:04 ` Edgecombe, Rick P
2022-10-03 18:39 ` Kees Cook
2022-10-03 22:49 ` Andy Lutomirski
2022-10-04 4:21 ` Kees Cook
2022-09-29 22:29 ` [PATCH v2 23/39] x86: Introduce userspace API for CET enabling Rick Edgecombe
2022-10-03 19:01 ` Kees Cook
2022-10-03 22:51 ` Edgecombe, Rick P
2022-10-06 18:50 ` Mike Rapoport
2022-10-10 10:56 ` Florian Weimer
2022-10-10 16:28 ` Edgecombe, Rick P
2022-10-12 12:18 ` Florian Weimer
2022-10-12 17:30 ` Edgecombe, Rick P
2022-09-29 22:29 ` [PATCH v2 24/39] x86/cet/shstk: Add user-mode shadow stack support Rick Edgecombe
2022-10-03 19:43 ` Kees Cook
2022-10-03 20:04 ` Dave Hansen
2022-10-04 4:04 ` Kees Cook
2022-10-04 16:25 ` Edgecombe, Rick P
2022-10-04 10:17 ` David Laight
2022-10-04 19:32 ` Kees Cook
2022-10-05 13:32 ` David Laight
2022-10-20 21:29 ` Edgecombe, Rick P
2022-10-20 22:54 ` Kees Cook
2022-09-29 22:29 ` [PATCH v2 25/39] x86/cet/shstk: Handle thread shadow stack Rick Edgecombe
2022-10-03 10:36 ` Mike Rapoport
2022-10-03 16:57 ` Edgecombe, Rick P
2022-10-03 20:29 ` Kees Cook
2022-10-04 22:09 ` Edgecombe, Rick P
2022-09-29 22:29 ` [PATCH v2 26/39] x86/cet/shstk: Introduce routines modifying shstk Rick Edgecombe
2022-10-03 20:44 ` Kees Cook
2022-10-04 22:13 ` Edgecombe, Rick P
2022-10-05 2:43 ` Andrew Cooper
2022-10-05 22:47 ` Edgecombe, Rick P
2022-10-05 22:58 ` Andrew Cooper
2022-10-20 21:51 ` Edgecombe, Rick P
2022-09-29 22:29 ` [PATCH v2 27/39] x86/cet/shstk: Handle signals for shadow stack Rick Edgecombe
2022-10-03 20:52 ` Kees Cook
2022-10-20 22:08 ` Edgecombe, Rick P
2022-10-20 22:57 ` Kees Cook
2022-09-29 22:29 ` [PATCH v2 28/39] x86/cet/shstk: Introduce map_shadow_stack syscall Rick Edgecombe
2022-10-03 22:23 ` Kees Cook
2022-10-04 22:56 ` Edgecombe, Rick P
2022-10-04 23:16 ` H.J. Lu
2022-10-10 11:13 ` Florian Weimer
2022-10-10 14:19 ` Jason A. Donenfeld
2022-09-29 22:29 ` [PATCH v2 29/39] x86/cet/shstk: Support wrss for userspace Rick Edgecombe
2022-10-03 22:28 ` Kees Cook
2022-10-03 23:00 ` Andy Lutomirski
2022-10-04 4:37 ` Kees Cook
2022-10-06 0:38 ` Edgecombe, Rick P
2022-10-06 3:11 ` Kees Cook
2022-10-04 8:30 ` Mike Rapoport
2022-09-29 22:29 ` [PATCH v2 30/39] x86: Expose thread features status in /proc/$PID/arch_status Rick Edgecombe
2022-10-03 22:37 ` Kees Cook
2022-10-03 22:45 ` Andy Lutomirski
2022-10-04 4:18 ` Kees Cook
2022-09-29 22:29 ` [PATCH v2 31/39] x86/cet/shstk: Wire in CET interface Rick Edgecombe
2022-10-03 22:41 ` Kees Cook
2022-09-29 22:29 ` [PATCH v2 32/39] selftests/x86: Add shadow stack test Rick Edgecombe
2022-10-03 23:56 ` Kees Cook
2022-09-29 22:29 ` [PATCH v2 33/39] x86/cpufeatures: Limit shadow stack to Intel CPUs Rick Edgecombe
2022-10-03 23:57 ` Kees Cook
2022-10-04 0:09 ` Dave Hansen
2022-10-04 4:54 ` Kees Cook
2022-10-04 15:47 ` Nathan Chancellor
2022-10-04 19:43 ` John Allen [this message]
2022-10-04 20:34 ` Edgecombe, Rick P
2022-10-04 20:50 ` Nathan Chancellor
2022-10-04 21:17 ` H. Peter Anvin
2022-10-04 23:24 ` Edgecombe, Rick P
2022-11-03 17:39 ` John Allen
2022-10-20 21:22 ` Edgecombe, Rick P
2022-10-04 8:36 ` Mike Rapoport
2022-09-29 22:29 ` [OPTIONAL/CLEANUP v2 34/39] x86: Separate out x86_regset for 32 and 64 bit Rick Edgecombe
2022-09-29 22:29 ` [OPTIONAL/CLEANUP v2 35/39] x86: Improve formatting of user_regset arrays Rick Edgecombe
2022-09-29 22:29 ` [OPTIONAL/RFC v2 36/39] x86/fpu: Add helper for initing features Rick Edgecombe
2022-10-03 19:07 ` Chang S. Bae
2022-10-04 23:05 ` Edgecombe, Rick P
2022-09-29 22:29 ` [OPTIONAL/RFC v2 37/39] x86/cet: Add PTRACE interface for CET Rick Edgecombe
2022-10-03 23:59 ` Kees Cook
2022-10-04 8:44 ` Mike Rapoport
2022-10-04 19:24 ` Kees Cook
2022-09-29 22:29 ` [OPTIONAL/RFC v2 38/39] x86/cet/shstk: Add ARCH_CET_UNLOCK Rick Edgecombe
2022-10-04 0:00 ` Kees Cook
2022-09-29 22:29 ` [OPTIONAL/RFC v2 39/39] x86: Add alt shadow stack support Rick Edgecombe
2022-10-03 23:21 ` Andy Lutomirski
2022-10-04 16:12 ` Edgecombe, Rick P
2022-10-04 17:46 ` Andy Lutomirski
2022-10-04 18:04 ` Edgecombe, Rick P
2022-10-03 17:04 ` [PATCH v2 00/39] Shadowstacks for userspace Kees Cook
2022-10-03 17:25 ` Jann Horn
2022-10-04 5:01 ` Kees Cook
2022-10-04 9:57 ` David Laight
2022-10-04 19:28 ` Kees Cook
2022-10-03 18:33 ` Edgecombe, Rick P
2022-10-04 3:59 ` Kees Cook
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