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Subject[PATCH v5 00/11] Control Flow Enforcement: Branch Tracking, PTRACE
Date
The previous version of CET Branch Tracking/PTRACE patches is at the following
link:

https://lkml.org/lkml/2018/9/21/773

Summary of changes from v4:

Add ENDBR32/ENDBR64 to vsyscall assembly code.
Small cleanups.
Small fixes in IBT bitmap allocation.

From the discussion of IBT bitmap size, I got:

1. There are potential issues from using TASK_SIZE/TASK_SIZE_MAX;
2. We cannot always depend on in_compat_syscall();
3. Doing allocation in the kernel is tricky;

The bitmap is needed only when an app does dlopen() non-IBT .so
files; most applications do not need it.

I am proposing that dlopen() does mmap() and passes the bitmap to
the kernel. If that is accepted, we can change these patches
accordingly.

H.J. Lu (3):
x86: Insert endbr32/endbr64 to vDSO
x86/vsyscall/32: Add ENDBR32 to vsyscall entry point
x86/vsyscall/64: Add ENDBR64 to vsyscall entry points

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 | 16 ++++
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/entry/vdso/vdso32/system_call.S | 3 +
arch/x86/entry/vsyscall/vsyscall_emu_64.S | 9 +++
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/asm/mmu_context.h | 7 ++
arch/x86/include/uapi/asm/elf_property.h | 1 +
arch/x86/include/uapi/asm/prctl.h | 1 +
arch/x86/kernel/cet.c | 78 +++++++++++++++++++
arch/x86/kernel/cet_prctl.c | 35 +++++++++
arch/x86/kernel/cpu/common.c | 17 ++++
arch/x86/kernel/elf.c | 5 ++
arch/x86/kernel/fpu/regset.c | 41 ++++++++++
arch/x86/kernel/process.c | 1 +
arch/x86/kernel/ptrace.c | 16 ++++
arch/x86/lib/x86-opcode-map.txt | 13 +++-
include/uapi/linux/elf.h | 1 +
mm/mmap.c | 19 ++++-
tools/objtool/arch/x86/lib/x86-opcode-map.txt | 13 +++-
24 files changed, 313 insertions(+), 10 deletions(-)

--
2.17.1

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