From: Dave Hansen <dave.hansen@intel.com>
To: "Yu, Yu-cheng" <yu-cheng.yu@intel.com>,
Andy Lutomirski <luto@amacapital.net>
Cc: Jann Horn <jannh@google.com>,
the arch/x86 maintainers <x86@kernel.org>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
kernel list <linux-kernel@vger.kernel.org>,
linux-doc@vger.kernel.org, Linux-MM <linux-mm@kvack.org>,
linux-arch <linux-arch@vger.kernel.org>,
Linux API <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>, 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>,
Vedvyas Shanbhogue <vedvyas.shanbhogue@intel.com>,
Dave Martin <Dave.Martin@arm.com>,
Weijiang Yang <weijiang.yang@intel.com>
Subject: Re: [PATCH v11 6/9] x86/cet: Add PTRACE interface for CET
Date: Thu, 3 Sep 2020 09:11:59 -0700 [thread overview]
Message-ID: <1b51d89c-c7de-2032-df23-e138d1369ffa@intel.com> (raw)
In-Reply-To: <88261152-2de1-fe8d-7ab0-acb108e97e04@intel.com>
On 9/3/20 9:09 AM, Yu, Yu-cheng wrote:
> If the debugger is going to write an MSR, only in the third case would
> this make a slight sense. For example, if the system has CET enabled,
> but the task does not have CET enabled, and GDB is writing to a CET MSR.
> But still, this is strange to me.
If this is strange, then why do we even _implement_ writes?
next prev parent reply other threads:[~2020-09-03 16:12 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-25 0:26 [PATCH v11 0/9] Control-flow Enforcement: Indirect Branch Tracking, PTRACE Yu-cheng Yu
2020-08-25 0:26 ` [PATCH v11 1/9] x86/cet/ibt: Add Kconfig option for user-mode Indirect Branch Tracking Yu-cheng Yu
2020-08-25 0:26 ` [PATCH v11 2/9] x86/cet/ibt: User-mode Indirect Branch Tracking support Yu-cheng Yu
2020-08-25 0:26 ` [PATCH v11 3/9] x86/cet/ibt: Handle signals for Indirect Branch Tracking Yu-cheng Yu
2020-08-25 0:26 ` [PATCH v11 4/9] x86/cet/ibt: ELF header parsing " Yu-cheng Yu
2020-08-25 0:26 ` [PATCH v11 5/9] x86/cet/ibt: Update arch_prctl functions " Yu-cheng Yu
2020-08-25 0:26 ` [PATCH v11 6/9] x86/cet: Add PTRACE interface for CET Yu-cheng Yu
2020-09-02 20:03 ` Jann Horn
2020-09-02 22:13 ` Yu, Yu-cheng
2020-09-02 23:50 ` Andy Lutomirski
2020-09-03 2:53 ` Yu, Yu-cheng
2020-09-03 4:35 ` Andy Lutomirski
2020-09-03 14:26 ` Dave Hansen
2020-09-03 14:54 ` Andy Lutomirski
2020-09-03 16:09 ` Yu, Yu-cheng
2020-09-03 16:11 ` Dave Hansen [this message]
2020-09-03 16:15 ` Andy Lutomirski
2020-09-03 16:25 ` Dave Hansen
2020-09-03 16:32 ` Andy Lutomirski
2020-09-03 16:42 ` Dave Hansen
2020-09-03 17:59 ` Yu, Yu-cheng
2020-09-03 16:21 ` Yu, Yu-cheng
2020-09-03 16:25 ` Andy Lutomirski
2020-09-03 0:33 ` Jann Horn
2020-09-03 2:53 ` Yu, Yu-cheng
2020-08-25 0:26 ` [PATCH v11 7/9] x86/vdso/32: Add ENDBR32 to __kernel_vsyscall entry point Yu-cheng Yu
2020-08-25 0:26 ` [PATCH v11 8/9] x86/vdso: Insert endbr32/endbr64 to vDSO Yu-cheng Yu
2020-08-25 0:33 ` Andy Lutomirski
2020-08-25 16:13 ` Yu, Yu-cheng
2020-08-25 0:26 ` [PATCH v11 9/9] x86: Disallow vsyscall emulation when CET is enabled Yu-cheng Yu
2020-08-25 0:32 ` Andy Lutomirski
2020-08-25 9:14 ` Florian Weimer
2020-08-25 15:08 ` Yu, Yu-cheng
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