[RFC PATCH v6 00/26] Control-flow Enforcement: Shadow Stack

Yu-cheng Yu
2018-11-20T08:19:51Z

The previous version of CET Shadow Stack patches is at the following
link:

https://lkml.org/lkml/2018/10/11/642

Summary of changes from v5:

To support more threads, change compat-mode thread shadow stack to
a fixed size from RLIMIT_STACK to RLIMIT_STACK / 4. This change
applies only to 32-bit pthreads.

Some clean-up and small fixes in response to comments. Thanks to
all reviewers.

Yu-cheng Yu (26):
Documentation/x86: Add CET description
x86/cpufeatures: Add CET CPU feature flags for Control-flow
Enforcement Technology (CET)
x86/fpu/xstate: Change names to separate XSAVES system and user states
x86/fpu/xstate: Introduce XSAVES system states
x86/fpu/xstate: Add XSAVES system states for shadow stack
x86/cet: Add control protection exception handler
x86/cet/shstk: Add Kconfig option for user-mode shadow stack
mm: Introduce VM_SHSTK for shadow stack memory
mm/mmap: Prevent Shadow Stack VMA merges
x86/mm: Change _PAGE_DIRTY to _PAGE_DIRTY_HW
x86/mm: Introduce _PAGE_DIRTY_SW
drm/i915/gvt: Update _PAGE_DIRTY to _PAGE_DIRTY_BITS
x86/mm: Modify ptep_set_wrprotect and pmdp_set_wrprotect for
_PAGE_DIRTY_SW
x86/mm: Shadow stack page fault error checking
mm: Handle shadow stack page fault
mm: Handle THP/HugeTLB shadow stack page fault
mm: Update can_follow_write_pte/pmd for shadow stack
mm: Introduce do_mmap_locked()
x86/cet/shstk: User-mode shadow stack support
x86/cet/shstk: Introduce WRUSS instruction
x86/cet/shstk: Signal handling for shadow stack
x86/cet/shstk: ELF header parsing of Shadow Stack
x86/cet/shstk: Handle thread shadow stack
mm/mmap: Add Shadow stack pages to memory accounting
x86/cet/shstk: Add arch_prctl functions for Shadow Stack
x86/cet/shstk: Add Shadow Stack instructions to opcode map

.../admin-guide/kernel-parameters.txt | 6 +
Documentation/index.rst | 1 +
Documentation/x86/index.rst | 13 +
Documentation/x86/intel_cet.rst | 268 +++++++++++++
arch/x86/Kconfig | 29 ++
arch/x86/Makefile | 7 +
arch/x86/entry/entry_64.S | 2 +-
arch/x86/ia32/ia32_signal.c | 21 +
arch/x86/include/asm/cet.h | 46 +++
arch/x86/include/asm/cpufeatures.h | 2 +
arch/x86/include/asm/disabled-features.h | 8 +-
arch/x86/include/asm/elf.h | 5 +
arch/x86/include/asm/fpu/internal.h | 5 +-
arch/x86/include/asm/fpu/types.h | 22 ++
arch/x86/include/asm/fpu/xstate.h | 26 +-
arch/x86/include/asm/mmu_context.h | 3 +
arch/x86/include/asm/msr-index.h | 15 +
arch/x86/include/asm/pgtable.h | 191 ++++++++--
arch/x86/include/asm/pgtable_types.h | 38 +-
arch/x86/include/asm/processor.h | 5 +
arch/x86/include/asm/sighandling.h | 5 +
arch/x86/include/asm/special_insns.h | 32 ++
arch/x86/include/asm/traps.h | 5 +
arch/x86/include/uapi/asm/elf_property.h | 15 +
arch/x86/include/uapi/asm/prctl.h | 5 +
arch/x86/include/uapi/asm/processor-flags.h | 2 +
arch/x86/include/uapi/asm/sigcontext.h | 15 +
arch/x86/kernel/Makefile | 4 +
arch/x86/kernel/cet.c | 304 +++++++++++++++
arch/x86/kernel/cet_prctl.c | 86 +++++
arch/x86/kernel/cpu/common.c | 25 ++
arch/x86/kernel/elf.c | 358 ++++++++++++++++++
arch/x86/kernel/fpu/core.c | 10 +-
arch/x86/kernel/fpu/init.c | 10 -
arch/x86/kernel/fpu/signal.c | 6 +-
arch/x86/kernel/fpu/xstate.c | 158 +++++---
arch/x86/kernel/idt.c | 4 +
arch/x86/kernel/process.c | 7 +-
arch/x86/kernel/process_64.c | 7 +
arch/x86/kernel/relocate_kernel_64.S | 2 +-
arch/x86/kernel/signal.c | 97 +++++
arch/x86/kernel/signal_compat.c | 2 +-
arch/x86/kernel/traps.c | 57 +++
arch/x86/kvm/vmx.c | 2 +-
arch/x86/lib/x86-opcode-map.txt | 26 +-
arch/x86/mm/fault.c | 27 ++
arch/x86/mm/pgtable.c | 41 ++
drivers/gpu/drm/i915/gvt/gtt.c | 2 +-
fs/binfmt_elf.c | 15 +
fs/proc/task_mmu.c | 3 +
include/asm-generic/pgtable.h | 14 +
include/linux/mm.h | 26 ++
include/uapi/asm-generic/siginfo.h | 3 +-
include/uapi/linux/elf.h | 1 +
mm/gup.c | 8 +-
mm/huge_memory.c | 12 +-
mm/memory.c | 7 +-
mm/mmap.c | 11 +
.../arch/x86/include/asm/disabled-features.h | 8 +-
tools/objtool/arch/x86/lib/x86-opcode-map.txt | 26 +-
60 files changed, 2004 insertions(+), 157 deletions(-)
create mode 100644 Documentation/x86/index.rst
create mode 100644 Documentation/x86/intel_cet.rst
create mode 100644 arch/x86/include/asm/cet.h
create mode 100644 arch/x86/include/uapi/asm/elf_property.h
create mode 100644 arch/x86/kernel/cet.c
create mode 100644 arch/x86/kernel/cet_prctl.c
create mode 100644 arch/x86/kernel/elf.c

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2.17.1