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>, x86-patch-review-AT-intel.com
Subject:		[RFC PATCH v9 0/7] Control-flow Enforcement: Indirect Branch Tracking
Date:		Wed, 5 Feb 2020 10:23:01 -0800
Message-ID:		<20200205182308.4028-1-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 can be found in "Intel
64 and IA-32 Architectures Software Developer's Manual" [1].

This is the second half of CET and enables Indirect Branch Tracking (IBT).

Changes from v8:

- Remove a patch that adds the legacy bitmap size to memory accounting,
  since the bitmap is now dynamically allocated.
- Change the legacy bitmap from a pre-defined address to
  get_unmapped_area().
- Fix mis-handling of WAIT_ENDBR in signals
- Split out PTRACE, VDSO, opcode map, and Makefile changes and submit
  separately.

[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] CET patches v8:

    https://lkml.kernel.org/r/20190813205225.12032-1-yu-cheng...
    https://lkml.kernel.org/r/20190813205359.12196-1-yu-cheng...

H.J. Lu (1):
  x86/cet/ibt: Add arch_prctl functions for Indirect Branch Tracking

Yu-cheng Yu (6):
  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
  mm: Update alloc_set_pte() for zero page
  x86/cet/ibt: Introduce arch_prctl(ARCH_X86_CET_MARK_LEGACY_CODE)

 arch/x86/Kconfig                              |  17 ++
 arch/x86/Makefile                             |   7 +
 arch/x86/include/asm/cet.h                    |   7 +
 arch/x86/include/asm/disabled-features.h      |   8 +-
 arch/x86/include/uapi/asm/prctl.h             |   3 +
 arch/x86/kernel/Makefile                      |   2 +-
 arch/x86/kernel/cet.c                         |  58 ++++-
 arch/x86/kernel/cet_bitmap.c                  | 226 ++++++++++++++++++
 arch/x86/kernel/cet_prctl.c                   |  19 ++
 arch/x86/kernel/cpu/common.c                  |  17 ++
 arch/x86/kernel/fpu/signal.c                  |   8 +-
 arch/x86/kernel/process_64.c                  |   5 +
 mm/memory.c                                   |   8 +
 .../arch/x86/include/asm/disabled-features.h  |   8 +-
 14 files changed, 385 insertions(+), 8 deletions(-)
 create mode 100644 arch/x86/kernel/cet_bitmap.c

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2.21.0