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
