From: Rick Edgecombe <rick.p.edgecombe@intel.com>
To: 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>,
Kees Cook <keescook@chromium.org>,
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>,
Dave Martin <Dave.Martin@arm.com>,
Weijiang Yang <weijiang.yang@intel.com>,
"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
joao.moreira@intel.com, John Allen <john.allen@amd.com>,
kcc@google.com, eranian@google.com
Cc: rick.p.edgecombe@intel.com, Yu-cheng Yu <yu-cheng.yu@intel.com>,
Michael Kerrisk <mtk.manpages@gmail.com>
Subject: [PATCH 06/35] x86/cet: Add control-protection fault handler
Date: Sun, 30 Jan 2022 13:18:09 -0800 [thread overview]
Message-ID: <20220130211838.8382-7-rick.p.edgecombe@intel.com> (raw)
In-Reply-To: <20220130211838.8382-1-rick.p.edgecombe@intel.com>
From: Yu-cheng Yu <yu-cheng.yu@intel.com>
A control-protection fault is triggered when a control-flow transfer
attempt violates Shadow Stack or Indirect Branch Tracking constraints.
For example, the return address for a RET instruction differs from the copy
on the shadow stack; or an indirect JMP instruction, without the NOTRACK
prefix, arrives at a non-ENDBR opcode.
The control-protection fault handler works in a similar way as the general
protection fault handler. It provides the si_code SEGV_CPERR to the signal
handler.
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
---
v1:
- Update static asserts for NSIGSEGV
Yu-cheng v29:
- Remove pr_emerg() since it is followed by die().
- Change boot_cpu_has() to cpu_feature_enabled().
Yu-cheng v25:
- Change CONFIG_X86_CET to CONFIG_X86_SHADOW_STACK.
- Change X86_FEATURE_CET to X86_FEATURE_SHSTK.
arch/arm/kernel/signal.c | 2 +-
arch/arm64/kernel/signal.c | 2 +-
arch/arm64/kernel/signal32.c | 2 +-
arch/sparc/kernel/signal32.c | 2 +-
arch/sparc/kernel/signal_64.c | 2 +-
arch/x86/include/asm/idtentry.h | 4 ++
arch/x86/kernel/idt.c | 4 ++
arch/x86/kernel/signal_compat.c | 2 +-
arch/x86/kernel/traps.c | 62 ++++++++++++++++++++++++++++++
include/uapi/asm-generic/siginfo.h | 3 +-
10 files changed, 78 insertions(+), 7 deletions(-)
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index c532a6041066..59aaadce9d52 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -681,7 +681,7 @@ asmlinkage void do_rseq_syscall(struct pt_regs *regs)
*/
static_assert(NSIGILL == 11);
static_assert(NSIGFPE == 15);
-static_assert(NSIGSEGV == 9);
+static_assert(NSIGSEGV == 10);
static_assert(NSIGBUS == 5);
static_assert(NSIGTRAP == 6);
static_assert(NSIGCHLD == 6);
diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c
index d8aaf4b6f432..d2da57c415b8 100644
--- a/arch/arm64/kernel/signal.c
+++ b/arch/arm64/kernel/signal.c
@@ -983,7 +983,7 @@ void __init minsigstksz_setup(void)
*/
static_assert(NSIGILL == 11);
static_assert(NSIGFPE == 15);
-static_assert(NSIGSEGV == 9);
+static_assert(NSIGSEGV == 10);
static_assert(NSIGBUS == 5);
static_assert(NSIGTRAP == 6);
static_assert(NSIGCHLD == 6);
diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c
index d984282b979f..8776a34c6444 100644
--- a/arch/arm64/kernel/signal32.c
+++ b/arch/arm64/kernel/signal32.c
@@ -460,7 +460,7 @@ void compat_setup_restart_syscall(struct pt_regs *regs)
*/
static_assert(NSIGILL == 11);
static_assert(NSIGFPE == 15);
-static_assert(NSIGSEGV == 9);
+static_assert(NSIGSEGV == 10);
static_assert(NSIGBUS == 5);
static_assert(NSIGTRAP == 6);
static_assert(NSIGCHLD == 6);
diff --git a/arch/sparc/kernel/signal32.c b/arch/sparc/kernel/signal32.c
index 6cc124a3bb98..dc50b2a78692 100644
--- a/arch/sparc/kernel/signal32.c
+++ b/arch/sparc/kernel/signal32.c
@@ -752,7 +752,7 @@ asmlinkage int do_sys32_sigstack(u32 u_ssptr, u32 u_ossptr, unsigned long sp)
*/
static_assert(NSIGILL == 11);
static_assert(NSIGFPE == 15);
-static_assert(NSIGSEGV == 9);
+static_assert(NSIGSEGV == 10);
static_assert(NSIGBUS == 5);
static_assert(NSIGTRAP == 6);
static_assert(NSIGCHLD == 6);
diff --git a/arch/sparc/kernel/signal_64.c b/arch/sparc/kernel/signal_64.c
index 2a78d2af1265..7fe2bd37bd1a 100644
--- a/arch/sparc/kernel/signal_64.c
+++ b/arch/sparc/kernel/signal_64.c
@@ -562,7 +562,7 @@ void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long
*/
static_assert(NSIGILL == 11);
static_assert(NSIGFPE == 15);
-static_assert(NSIGSEGV == 9);
+static_assert(NSIGSEGV == 10);
static_assert(NSIGBUS == 5);
static_assert(NSIGTRAP == 6);
static_assert(NSIGCHLD == 6);
diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h
index 1345088e9902..a90791433152 100644
--- a/arch/x86/include/asm/idtentry.h
+++ b/arch/x86/include/asm/idtentry.h
@@ -562,6 +562,10 @@ DECLARE_IDTENTRY_ERRORCODE(X86_TRAP_SS, exc_stack_segment);
DECLARE_IDTENTRY_ERRORCODE(X86_TRAP_GP, exc_general_protection);
DECLARE_IDTENTRY_ERRORCODE(X86_TRAP_AC, exc_alignment_check);
+#ifdef CONFIG_X86_SHADOW_STACK
+DECLARE_IDTENTRY_ERRORCODE(X86_TRAP_CP, exc_control_protection);
+#endif
+
/* Raw exception entries which need extra work */
DECLARE_IDTENTRY_RAW(X86_TRAP_UD, exc_invalid_op);
DECLARE_IDTENTRY_RAW(X86_TRAP_BP, exc_int3);
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index df0fa695bb09..9f1bdaabc246 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -113,6 +113,10 @@ static const __initconst struct idt_data def_idts[] = {
#elif defined(CONFIG_X86_32)
SYSG(IA32_SYSCALL_VECTOR, entry_INT80_32),
#endif
+
+#ifdef CONFIG_X86_SHADOW_STACK
+ INTG(X86_TRAP_CP, asm_exc_control_protection),
+#endif
};
/*
diff --git a/arch/x86/kernel/signal_compat.c b/arch/x86/kernel/signal_compat.c
index b52407c56000..ff50cd978ea5 100644
--- a/arch/x86/kernel/signal_compat.c
+++ b/arch/x86/kernel/signal_compat.c
@@ -27,7 +27,7 @@ static inline void signal_compat_build_tests(void)
*/
BUILD_BUG_ON(NSIGILL != 11);
BUILD_BUG_ON(NSIGFPE != 15);
- BUILD_BUG_ON(NSIGSEGV != 9);
+ BUILD_BUG_ON(NSIGSEGV != 10);
BUILD_BUG_ON(NSIGBUS != 5);
BUILD_BUG_ON(NSIGTRAP != 6);
BUILD_BUG_ON(NSIGCHLD != 6);
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index c9d566dcf89a..54b7a146fd5e 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -39,6 +39,7 @@
#include <linux/io.h>
#include <linux/hardirq.h>
#include <linux/atomic.h>
+#include <linux/nospec.h>
#include <asm/stacktrace.h>
#include <asm/processor.h>
@@ -641,6 +642,67 @@ DEFINE_IDTENTRY_ERRORCODE(exc_general_protection)
cond_local_irq_disable(regs);
}
+#ifdef CONFIG_X86_SHADOW_STACK
+static const char * const control_protection_err[] = {
+ "unknown",
+ "near-ret",
+ "far-ret/iret",
+ "endbranch",
+ "rstorssp",
+ "setssbsy",
+ "unknown",
+};
+
+static DEFINE_RATELIMIT_STATE(cpf_rate, DEFAULT_RATELIMIT_INTERVAL,
+ DEFAULT_RATELIMIT_BURST);
+
+/*
+ * When a control protection exception occurs, send a signal to the responsible
+ * application. Currently, control protection is only enabled for user mode.
+ * This exception should not come from kernel mode.
+ */
+DEFINE_IDTENTRY_ERRORCODE(exc_control_protection)
+{
+ struct task_struct *tsk;
+
+ if (!user_mode(regs)) {
+ die("kernel control protection fault", regs, error_code);
+ panic("Unexpected kernel control protection fault. Machine halted.");
+ }
+
+ cond_local_irq_enable(regs);
+
+ if (!cpu_feature_enabled(X86_FEATURE_SHSTK))
+ WARN_ONCE(1, "Control protection fault with CET support disabled\n");
+
+ tsk = current;
+ tsk->thread.error_code = error_code;
+ tsk->thread.trap_nr = X86_TRAP_CP;
+
+ /*
+ * Ratelimit to prevent log spamming.
+ */
+ if (show_unhandled_signals && unhandled_signal(tsk, SIGSEGV) &&
+ __ratelimit(&cpf_rate)) {
+ unsigned long ssp;
+ int cpf_type;
+
+ cpf_type = array_index_nospec(error_code, ARRAY_SIZE(control_protection_err));
+
+ rdmsrl(MSR_IA32_PL3_SSP, ssp);
+ pr_emerg("%s[%d] control protection ip:%lx sp:%lx ssp:%lx error:%lx(%s)",
+ tsk->comm, task_pid_nr(tsk),
+ regs->ip, regs->sp, ssp, error_code,
+ control_protection_err[cpf_type]);
+ print_vma_addr(KERN_CONT " in ", regs->ip);
+ pr_cont("\n");
+ }
+
+ force_sig_fault(SIGSEGV, SEGV_CPERR, (void __user *)0);
+ cond_local_irq_disable(regs);
+}
+#endif
+
static bool do_int3(struct pt_regs *regs)
{
int res;
diff --git a/include/uapi/asm-generic/siginfo.h b/include/uapi/asm-generic/siginfo.h
index 3ba180f550d7..081f4b37d22c 100644
--- a/include/uapi/asm-generic/siginfo.h
+++ b/include/uapi/asm-generic/siginfo.h
@@ -240,7 +240,8 @@ typedef struct siginfo {
#define SEGV_ADIPERR 7 /* Precise MCD exception */
#define SEGV_MTEAERR 8 /* Asynchronous ARM MTE error */
#define SEGV_MTESERR 9 /* Synchronous ARM MTE exception */
-#define NSIGSEGV 9
+#define SEGV_CPERR 10 /* Control protection fault */
+#define NSIGSEGV 10
/*
* SIGBUS si_codes
--
2.17.1
next prev parent reply other threads:[~2022-01-30 21:23 UTC|newest]
Thread overview: 154+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-30 21:18 [PATCH 00/35] Shadow stacks for userspace Rick Edgecombe
2022-01-30 21:18 ` [PATCH 01/35] Documentation/x86: Add CET description Rick Edgecombe
2022-01-30 21:18 ` [PATCH 02/35] x86/cet/shstk: Add Kconfig option for Shadow Stack Rick Edgecombe
2022-02-07 22:39 ` Dave Hansen
2022-02-08 8:41 ` Thomas Gleixner
2022-02-08 20:20 ` Edgecombe, Rick P
2022-02-08 8:39 ` Thomas Gleixner
2022-01-30 21:18 ` [PATCH 03/35] x86/cpufeatures: Add CET CPU feature flags for Control-flow Enforcement Technology (CET) Rick Edgecombe
2022-02-07 22:45 ` Dave Hansen
2022-02-08 20:23 ` Edgecombe, Rick P
2022-02-09 1:10 ` Kees Cook
2022-01-30 21:18 ` [PATCH 04/35] x86/cpufeatures: Introduce CPU setup and option parsing for CET Rick Edgecombe
2022-02-07 22:49 ` Dave Hansen
2022-02-08 20:29 ` Edgecombe, Rick P
2022-01-30 21:18 ` [PATCH 05/35] x86/fpu/xstate: Introduce CET MSR and XSAVES supervisor states Rick Edgecombe
2022-02-07 23:28 ` Dave Hansen
2022-02-08 21:36 ` Edgecombe, Rick P
2022-01-30 21:18 ` Rick Edgecombe [this message]
2022-02-07 23:56 ` [PATCH 06/35] x86/cet: Add control-protection fault handler Dave Hansen
2022-02-08 22:23 ` Edgecombe, Rick P
2022-01-30 21:18 ` [PATCH 07/35] x86/mm: Remove _PAGE_DIRTY from kernel RO pages Rick Edgecombe
2022-02-08 0:13 ` Dave Hansen
2022-02-08 22:52 ` Edgecombe, Rick P
2022-01-30 21:18 ` [PATCH 08/35] x86/mm: Move pmd_write(), pud_write() up in the file Rick Edgecombe
2022-01-30 21:18 ` [PATCH 09/35] x86/mm: Introduce _PAGE_COW Rick Edgecombe
2022-02-08 1:05 ` Dave Hansen
2022-01-30 21:18 ` [PATCH 10/35] drm/i915/gvt: Change _PAGE_DIRTY to _PAGE_DIRTY_BITS Rick Edgecombe
2022-02-09 16:58 ` Dave Hansen
2022-02-11 1:39 ` Edgecombe, Rick P
2022-02-11 7:13 ` Wang, Zhi A
2022-02-12 1:45 ` Edgecombe, Rick P
2022-01-30 21:18 ` [PATCH 11/35] x86/mm: Update pte_modify for _PAGE_COW Rick Edgecombe
2022-02-09 18:00 ` Dave Hansen
2022-01-30 21:18 ` [PATCH 12/35] x86/mm: Update ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to _PAGE_COW Rick Edgecombe
2022-02-09 18:30 ` Dave Hansen
2022-01-30 21:18 ` [PATCH 13/35] mm: Move VM_UFFD_MINOR_BIT from 37 to 38 Rick Edgecombe
2022-01-30 21:18 ` [PATCH 14/35] mm: Introduce VM_SHADOW_STACK for shadow stack memory Rick Edgecombe
2022-02-09 21:55 ` Dave Hansen
2022-01-30 21:18 ` [PATCH 15/35] x86/mm: Check Shadow Stack page fault errors Rick Edgecombe
2022-02-09 19:06 ` Dave Hansen
2022-01-30 21:18 ` [PATCH 16/35] x86/mm: Update maybe_mkwrite() for shadow stack Rick Edgecombe
2022-02-09 21:16 ` Dave Hansen
2022-01-30 21:18 ` [PATCH 17/35] mm: Fixup places that call pte_mkwrite() directly Rick Edgecombe
2022-02-09 21:51 ` Dave Hansen
2022-01-30 21:18 ` [PATCH 18/35] mm: Add guard pages around a shadow stack Rick Edgecombe
2022-02-09 22:23 ` Dave Hansen
2022-02-10 22:38 ` David Laight
2022-02-10 23:42 ` Edgecombe, Rick P
2022-02-11 9:08 ` David Laight
2022-02-10 22:43 ` Dave Hansen
2022-02-10 23:07 ` Andy Lutomirski
2022-02-10 23:40 ` Edgecombe, Rick P
2022-02-11 17:54 ` Andy Lutomirski
2022-02-12 0:10 ` Edgecombe, Rick P
2022-01-30 21:18 ` [PATCH 19/35] mm/mmap: Add shadow stack pages to memory accounting Rick Edgecombe
2022-02-09 22:27 ` Dave Hansen
2022-01-30 21:18 ` [PATCH 20/35] mm: Update can_follow_write_pte() for shadow stack Rick Edgecombe
2022-02-09 22:50 ` Dave Hansen
2022-02-09 22:52 ` Dave Hansen
2022-02-10 22:45 ` David Laight
2022-01-30 21:18 ` [PATCH 21/35] mm/mprotect: Exclude shadow stack from preserve_write Rick Edgecombe
2022-02-10 19:27 ` Dave Hansen
2022-01-30 21:18 ` [PATCH 22/35] x86/mm: Prevent VM_WRITE shadow stacks Rick Edgecombe
2022-02-11 22:19 ` Dave Hansen
2022-02-12 1:44 ` Edgecombe, Rick P
2022-01-30 21:18 ` [PATCH 23/35] x86/fpu: Add helpers for modifying supervisor xstate Rick Edgecombe
2022-02-08 8:51 ` Thomas Gleixner
2022-02-09 19:55 ` Edgecombe, Rick P
2022-02-12 0:27 ` Dave Hansen
2022-02-12 2:31 ` Edgecombe, Rick P
2022-01-30 21:18 ` [PATCH 24/35] mm: Re-introduce vm_flags to do_mmap() Rick Edgecombe
2022-01-30 21:18 ` [PATCH 25/35] x86/cet/shstk: Add user-mode shadow stack support Rick Edgecombe
2022-02-11 23:37 ` Dave Hansen
2022-02-12 0:07 ` Andy Lutomirski
2022-02-12 0:11 ` Dave Hansen
2022-02-12 0:12 ` Edgecombe, Rick P
2022-01-30 21:18 ` [PATCH 26/35] x86/process: Change copy_thread() argument 'arg' to 'stack_size' Rick Edgecombe
2022-02-08 8:38 ` Thomas Gleixner
2022-02-11 2:09 ` Edgecombe, Rick P
2022-02-14 12:33 ` Jann Horn
2022-02-15 1:22 ` Edgecombe, Rick P
2022-02-15 8:49 ` Christian Brauner
2022-01-30 21:18 ` [PATCH 27/35] x86/fpu: Add unsafe xsave buffer helpers Rick Edgecombe
2022-01-30 21:18 ` [PATCH 28/35] x86/cet/shstk: Handle thread shadow stack Rick Edgecombe
2022-01-30 21:18 ` [PATCH 29/35] x86/cet/shstk: Introduce shadow stack token setup/verify routines Rick Edgecombe
2022-01-30 21:18 ` [PATCH 30/35] x86/cet/shstk: Handle signals for shadow stack Rick Edgecombe
2022-01-30 21:18 ` [PATCH 31/35] x86/cet/shstk: Add arch_prctl elf feature functions Rick Edgecombe
2022-01-30 21:18 ` [PATCH 32/35] x86/cet/shstk: Introduce map_shadow_stack syscall Rick Edgecombe
2022-01-30 21:18 ` [PATCH 33/35] selftests/x86: Add map_shadow_stack syscall test Rick Edgecombe
2022-02-03 22:42 ` Dave Hansen
2022-02-04 1:22 ` Edgecombe, Rick P
2022-01-30 21:18 ` [PATCH 34/35] x86/cet/shstk: Support wrss for userspace Rick Edgecombe
2022-01-31 7:56 ` Florian Weimer
2022-01-31 18:26 ` H.J. Lu
2022-01-31 18:45 ` Florian Weimer
2022-01-30 21:18 ` [PATCH 35/35] x86/cpufeatures: Limit shadow stack to Intel CPUs Rick Edgecombe
2022-02-03 21:58 ` John Allen
2022-02-03 22:23 ` H.J. Lu
2022-02-04 22:21 ` John Allen
2022-02-03 21:07 ` [PATCH 00/35] Shadow stacks for userspace Thomas Gleixner
2022-02-04 1:08 ` Edgecombe, Rick P
2022-02-04 5:20 ` Andy Lutomirski
2022-02-04 20:23 ` Edgecombe, Rick P
2022-02-05 13:26 ` David Laight
2022-02-05 13:29 ` H.J. Lu
2022-02-05 20:15 ` Edgecombe, Rick P
2022-02-05 20:21 ` H.J. Lu
2022-02-06 13:19 ` Peter Zijlstra
2022-02-06 13:42 ` David Laight
2022-02-06 13:55 ` H.J. Lu
2022-02-07 10:22 ` Florian Weimer
2022-02-08 1:46 ` Edgecombe, Rick P
2022-02-08 1:31 ` Andy Lutomirski
2022-02-08 9:31 ` Thomas Gleixner
2022-02-08 16:15 ` Andy Lutomirski
2022-02-06 13:06 ` Peter Zijlstra
2022-02-06 18:42 ` Mike Rapoport
2022-02-07 7:20 ` Adrian Reber
2022-02-07 16:30 ` Dave Hansen
2022-02-08 9:16 ` Mike Rapoport
2022-02-08 9:29 ` Cyrill Gorcunov
2022-02-08 16:21 ` Andy Lutomirski
2022-02-08 17:02 ` Cyrill Gorcunov
2022-02-08 21:54 ` Dmitry Safonov
2022-02-09 6:37 ` Cyrill Gorcunov
2022-02-09 2:18 ` Edgecombe, Rick P
2022-02-09 6:43 ` Cyrill Gorcunov
2022-02-09 10:53 ` Mike Rapoport
2022-02-10 2:37 ` Andy Lutomirski
2022-02-10 2:53 ` H.J. Lu
2022-02-10 13:52 ` Willgerodt, Felix
2022-02-11 7:41 ` avagin
2022-02-11 8:04 ` Mike Rapoport
2022-02-28 20:27 ` Mike Rapoport
2022-02-28 20:30 ` Andy Lutomirski
2022-02-28 21:30 ` Mike Rapoport
2022-02-28 22:55 ` Andy Lutomirski
2022-03-03 19:40 ` Mike Rapoport
2022-03-03 23:00 ` Andy Lutomirski
2022-03-04 1:30 ` Edgecombe, Rick P
2022-03-04 19:13 ` Andy Lutomirski
2022-03-07 18:56 ` Mike Rapoport
2022-03-07 19:07 ` H.J. Lu
2022-05-31 11:59 ` Mike Rapoport
2022-05-31 16:25 ` Edgecombe, Rick P
2022-05-31 16:36 ` Mike Rapoport
2022-05-31 17:34 ` Edgecombe, Rick P
2022-05-31 18:00 ` H.J. Lu
2022-06-01 17:27 ` Edgecombe, Rick P
2022-06-01 19:27 ` H.J. Lu
2022-06-01 8:06 ` Mike Rapoport
2022-06-01 17:24 ` Edgecombe, Rick P
2022-06-09 18:04 ` Mike Rapoport
2022-03-07 22:21 ` David Laight
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