Control-flow Enforcement: Indirect Branch Tracking

From:		Yu-cheng Yu <yu-cheng.yu-AT-intel.com>
To:		x86-AT-kernel.org, "H. Peter Anvin" <hpa-AT-zytor.com>, Thomas Gleixner <tglx-AT-linutronix.de>, Ingo Molnar <mingo-AT-redhat.com>, linux-kernel-AT-vger.kernel.org, linux-doc-AT-vger.kernel.org, linux-mm-AT-kvack.org, linux-arch-AT-vger.kernel.org, linux-api-AT-vger.kernel.org, Arnd Bergmann <arnd-AT-arndb.de>, Andy Lutomirski <luto-AT-kernel.org>, Balbir Singh <bsingharora-AT-gmail.com>, Borislav Petkov <bp-AT-alien8.de>, Cyrill Gorcunov <gorcunov-AT-gmail.com>, Dave Hansen <dave.hansen-AT-linux.intel.com>, Eugene Syromiatnikov <esyr-AT-redhat.com>, Florian Weimer <fweimer-AT-redhat.com>, "H.J. Lu" <hjl.tools-AT-gmail.com>, Jann Horn <jannh-AT-google.com>, Jonathan Corbet <corbet-AT-lwn.net>, Kees Cook <keescook-AT-chromium.org>, Mike Kravetz <mike.kravetz-AT-oracle.com>, Nadav Amit <nadav.amit-AT-gmail.com>, Oleg Nesterov <oleg-AT-redhat.com>, Pavel Machek <pavel-AT-ucw.cz>, Peter Zijlstra <peterz-AT-infradead.org>, Randy Dunlap <rdunlap-AT-infradead.org>, "Ravi V. Shankar" <ravi.v.shankar-AT-intel.com>, Dave Martin <Dave.Martin-AT-arm.com>, Weijiang Yang <weijiang.yang-AT-intel.com>, Pengfei Xu <pengfei.xu-AT-intel.com>, Haitao Huang <haitao.huang-AT-intel.com>, Rick P Edgecombe <rick.p.edgecombe-AT-intel.com>
Subject:		[PATCH v29 00/10] Control-flow Enforcement: Indirect Branch Tracking
Date:		Fri, 20 Aug 2021 11:22:35 -0700
Message-ID:		<20210820182245.1188-1-yu-cheng.yu@intel.com>
Cc:		Yu-cheng Yu <yu-cheng.yu-AT-intel.com>
Archive-link:		Article

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 v29:
- Rebase to Linus tree v5.14-rc6.

Changes in v28:
- Patch #10: Update change log and comments.
- Rebase to Linus tree v5.14-rc2.

Changes in v27:
- Use a ucontext flag to save/restore IBT status.
- Disable IBT support for IA32.
- Rebase to Linus tree v5.13-rc2.

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

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

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

Yu-cheng Yu (7):
  x86/cet/ibt: Add Kconfig option for Indirect Branch Tracking
  x86/cet/ibt: Add user-mode Indirect Branch Tracking support
  x86/cet/ibt: Handle signals for Indirect Branch Tracking
  x86/cet/ibt: Disable IBT for ia32
  x86/cet/ibt: Update ELF header parsing for Indirect Branch Tracking
  x86/vdso: Introduce ENDBR macro
  x86/vdso: Add ENDBR to __vdso_sgx_enter_enclave

 arch/x86/Kconfig                         | 19 +++++
 arch/x86/entry/vdso/Makefile             |  4 +
 arch/x86/entry/vdso/vdso32/system_call.S |  2 +
 arch/x86/entry/vdso/vsgx.S               |  4 +
 arch/x86/ia32/ia32_signal.c              | 22 +++++-
 arch/x86/include/asm/cet.h               | 13 ++++
 arch/x86/include/asm/disabled-features.h |  8 +-
 arch/x86/include/asm/elf.h               | 13 +++-
 arch/x86/include/asm/vdso.h              | 20 ++++-
 arch/x86/include/uapi/asm/ucontext.h     |  5 ++
 arch/x86/kernel/Makefile                 |  1 +
 arch/x86/kernel/cet_prctl.c              |  5 ++
 arch/x86/kernel/ibt.c                    | 99 ++++++++++++++++++++++++
 arch/x86/kernel/process_64.c             |  6 ++
 arch/x86/kernel/signal.c                 |  6 ++
 15 files changed, 221 insertions(+), 6 deletions(-)
 create mode 100644 arch/x86/kernel/ibt.c

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2.21.0