linux-kernel - [PATCH v13 0/8] Control-flow Enforcement: Indirect Branch Tracking

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Message-Id: <20200925145804.5821-1-yu-cheng.yu@intel.com>
Date:   Fri, 25 Sep 2020 07:57:56 -0700
From:   Yu-cheng Yu <yu-cheng.yu@...el.com>
To:     x86@...nel.org, "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-mm@...ck.org,
        linux-arch@...r.kernel.org, linux-api@...r.kernel.org,
        Arnd Bergmann <arnd@...db.de>,
        Andy Lutomirski <luto@...nel.org>,
        Balbir Singh <bsingharora@...il.com>,
        Borislav Petkov <bp@...en8.de>,
        Cyrill Gorcunov <gorcunov@...il.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Eugene Syromiatnikov <esyr@...hat.com>,
        Florian Weimer <fweimer@...hat.com>,
        "H.J. Lu" <hjl.tools@...il.com>, Jann Horn <jannh@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        Kees Cook <keescook@...omium.org>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Nadav Amit <nadav.amit@...il.com>,
        Oleg Nesterov <oleg@...hat.com>, Pavel Machek <pavel@....cz>,
        Peter Zijlstra <peterz@...radead.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>,
        Vedvyas Shanbhogue <vedvyas.shanbhogue@...el.com>,
        Dave Martin <Dave.Martin@....com>,
        Weijiang Yang <weijiang.yang@...el.com>,
        Pengfei Xu <pengfei.xu@...el.com>
Cc:     Yu-cheng Yu <yu-cheng.yu@...el.com>
Subject: [PATCH v13 0/8] Control-flow Enforcement: Indirect Branch Tracking

Control-flow Enforcement (CET) is a new Intel processor feature that blocks
return/jump-oriented programming attacks.  Details are in "Intel 64 and
IA-32 Architectures Software Developer's Manual" [1].

This is the second part of CET and enables Indirect Branch Tracking (IBT).
It is built on top of the shadow stack series.

Changes in v13:
- Drop the patch that disables vsyscall emulation when CET is enabled, and
  re-introduce an earlier patch that fixes shadow stack and IBT for the
  emulation code.
- Remove "INTEL" string from CET Kconfig options, update help text, and
  change IBT default configuration to N.

[1] Intel 64 and IA-32 Architectures Software Developer's Manual:

    https://software.intel.com/en-us/download/intel-64-and-ia-32-
    architectures-sdm-combined-volumes-1-2a-2b-2c-2d-3a-3b-3c-3d-and-4

[2] Indirect Branch Tracking patches v12.

    https://lkml.kernel.org/r/20200918192312.25978-1-yu-cheng.yu@intel.com/

H.J. Lu (3):
  x86/cet/ibt: Update arch_prctl functions for Indirect Branch Tracking
  x86/vdso/32: Add ENDBR32 to __kernel_vsyscall entry point
  x86/vdso: Insert endbr32/endbr64 to vDSO

Yu-cheng Yu (5):
  x86/cet/ibt: Add Kconfig option for user-mode Indirect Branch Tracking
  x86/cet/ibt: User-mode Indirect Branch Tracking support
  x86/cet/ibt: Handle signals for Indirect Branch Tracking
  x86/cet/ibt: ELF header parsing for Indirect Branch Tracking
  x86/vsyscall/64: Fixup Shadow Stack and Indirect Branch Tracking for
    vsyscall emulation

 arch/x86/Kconfig                              | 21 +++++++
 arch/x86/entry/vdso/Makefile                  |  4 ++
 arch/x86/entry/vdso/vdso32/system_call.S      |  3 +
 arch/x86/entry/vsyscall/vsyscall_64.c         | 34 +++++++++++
 arch/x86/entry/vsyscall/vsyscall_emu_64.S     |  9 +++
 arch/x86/entry/vsyscall/vsyscall_trace.h      |  1 +
 arch/x86/include/asm/cet.h                    |  3 +
 arch/x86/include/asm/disabled-features.h      |  8 ++-
 arch/x86/kernel/cet.c                         | 60 ++++++++++++++++++-
 arch/x86/kernel/cet_prctl.c                   |  8 ++-
 arch/x86/kernel/cpu/common.c                  | 17 ++++++
 arch/x86/kernel/fpu/signal.c                  |  8 ++-
 arch/x86/kernel/process_64.c                  |  8 +++
 .../arch/x86/include/asm/disabled-features.h  |  8 ++-
 14 files changed, 184 insertions(+), 8 deletions(-)

-- 
2.21.0