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>, Vedvyas Shanbhogue <vedvyas.shanbhogue-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>
Subject:		[PATCH v23 0/9] Control-flow Enforcement: Indirect Branch Tracking
Date:		Tue, 16 Mar 2021 08:13:10 -0700
Message-ID:		<20210316151320.6123-1-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 v23:
- Add patch #6: introduce a macro for ENDBR instructions.
- Patch #7: replace endbr32 with ENDBR macro.
- Patch #9: revise, add/replace endbr64 with ENDBR macro.
- Rebase to Linus tree v5.12-rc3.

[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

[2] Indirect Branch Tracking patches v22:

    https://lore.kernel.org/r/20210310220519.16811-1-yu-cheng...

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

Yu-cheng Yu (6):
  x86/cet/ibt: Update Kconfig 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: Update ELF header parsing for Indirect Branch Tracking
  x86/entry: Introduce ENDBR macro
  x86/vdso: Add ENDBR to __vdso_sgx_enter_enclave

 arch/x86/Kconfig                         |  1 +
 arch/x86/entry/calling.h                 | 18 ++++++++
 arch/x86/entry/vdso/Makefile             |  4 ++
 arch/x86/entry/vdso/vdso32/system_call.S |  2 +
 arch/x86/entry/vdso/vsgx.S               |  4 ++
 arch/x86/include/asm/cet.h               |  3 ++
 arch/x86/kernel/cet.c                    | 59 +++++++++++++++++++++++-
 arch/x86/kernel/cet_prctl.c              |  5 ++
 arch/x86/kernel/fpu/signal.c             |  8 ++--
 arch/x86/kernel/process_64.c             |  8 ++++
 10 files changed, 107 insertions(+), 5 deletions(-)

-- 
2.21.0