[PATCH v26 0/9] Control-flow Enforcement: Indirect Branch Tracking

[Yu-cheng Yu]

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 v26:
- Rebase to Linus tree v5.12.

Changes in v25:
- Make updates to Kconfig and CPU feature flags for the removal of Kconfig
  X86_CET and software-defined X86_FEATURE_CET.
- Update ENDBR definition.
- Rebase to Linus tree v5.12-rc7.

[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 v25:

    https://lore.kernel.org/r/20210415221734.32628-1-yu-cheng.yu@xxxxxxxxx/

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 (6):
  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: 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                         | 21 +++++++++
 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               |  9 ++++
 arch/x86/include/asm/disabled-features.h |  8 +++-
 arch/x86/include/asm/vdso.h              | 20 ++++++++-
 arch/x86/include/uapi/asm/sigcontext.h   |  1 +
 arch/x86/kernel/Makefile                 |  1 +
 arch/x86/kernel/cet_prctl.c              |  5 +++
 arch/x86/kernel/fpu/signal.c             | 33 ++++++++++++--
 arch/x86/kernel/ibt.c                    | 57 ++++++++++++++++++++++++
 arch/x86/kernel/process_64.c             |  8 ++++
 13 files changed, 168 insertions(+), 5 deletions(-)
 create mode 100644 arch/x86/kernel/ibt.c

-- 
2.21.0