[RFC,v4,0/9] Control Flow Enforcement: Branch Tracking, PTRACE

Message

Yu-cheng Yu Sept. 21, 2018, 3:05 p.m. UTC

The previous version of CET patches can be found in the following
link:

  https://lkml.org/lkml/2018/8/30/582

Summary of changes from v3:

  Move IBT legacy code bitmap allocation back to when the application
  requests it.  Most application do not need the bitmap.  It is only
  used when an application does dlopen() a legacy library.

  In the previous version, we pre-allocated the bitmap for every IBT-
  enabled application to avoid creating a hole in the linear address.
  However, this created a problem when the system has limited memory.

H.J. Lu (1):
  x86: Insert endbr32/endbr64 to vDSO

Yu-cheng Yu (8):
  x86/cet/ibt: Add Kconfig option for user-mode Indirect Branch Tracking
  x86/cet/ibt: User-mode indirect branch tracking support
  x86/cet/ibt: Add IBT legacy code bitmap allocation function
  mm/mmap: Add IBT bitmap size to address space limit check
  x86/cet/ibt: ELF header parsing for IBT
  x86/cet/ibt: Add arch_prctl functions for IBT
  x86/cet/ibt: Add ENDBR to op-code-map
  x86/cet: Add PTRACE interface for CET

 arch/x86/Kconfig                              | 12 +++
 arch/x86/Makefile                             |  7 ++
 arch/x86/entry/vdso/.gitignore                |  4 +
 arch/x86/entry/vdso/Makefile                  | 12 ++-
 arch/x86/entry/vdso/vdso-layout.lds.S         |  1 +
 arch/x86/include/asm/cet.h                    |  8 ++
 arch/x86/include/asm/disabled-features.h      |  8 +-
 arch/x86/include/asm/fpu/regset.h             |  7 +-
 arch/x86/include/uapi/asm/elf_property.h      |  1 +
 arch/x86/include/uapi/asm/prctl.h             |  1 +
 arch/x86/include/uapi/asm/resource.h          |  5 ++
 arch/x86/kernel/cet.c                         | 76 +++++++++++++++++++
 arch/x86/kernel/cet_prctl.c                   | 38 +++++++++-
 arch/x86/kernel/cpu/common.c                  | 20 ++++-
 arch/x86/kernel/elf.c                         |  8 +-
 arch/x86/kernel/fpu/regset.c                  | 41 ++++++++++
 arch/x86/kernel/process.c                     |  2 +
 arch/x86/kernel/ptrace.c                      | 16 ++++
 arch/x86/lib/x86-opcode-map.txt               | 13 +++-
 include/uapi/asm-generic/resource.h           |  3 +
 include/uapi/linux/elf.h                      |  1 +
 mm/mmap.c                                     | 12 ++-
 tools/objtool/arch/x86/lib/x86-opcode-map.txt | 13 +++-
 23 files changed, 296 insertions(+), 13 deletions(-)