| From: |
| Yu-cheng Yu <yu-cheng.yu-AT-intel.com> |
| To: |
| linux-kernel-AT-vger.kernel.org, linux-doc-AT-vger.kernel.org, linux-mm-AT-kvack.org, linux-arch-AT-vger.kernel.org, x86-AT-kernel.org, "H. Peter Anvin" <hpa-AT-zytor.com>, Thomas Gleixner <tglx-AT-linutronix.de>, Ingo Molnar <mingo-AT-redhat.com>, "H.J. Lu" <hjl.tools-AT-gmail.com>, Vedvyas Shanbhogue <vedvyas.shanbhogue-AT-intel.com>, "Ravi V. Shankar" <ravi.v.shankar-AT-intel.com>, Dave Hansen <dave.hansen-AT-linux.intel.com>, Andy Lutomirski <luto-AT-amacapital.net>, Jonathan Corbet <corbet-AT-lwn.net>, Oleg Nesterov <oleg-AT-redhat.com>, Arnd Bergmann <arnd-AT-arndb.de>, Mike Kravetz <mike.kravetz-AT-oracle.com> |
| Subject: |
| [PATCH 00/10] Control Flow Enforcement - Part (3) |
| Date: |
| Thu, 7 Jun 2018 07:37:57 -0700 |
| Message-ID: |
| <20180607143807.3611-1-yu-cheng.yu@intel.com> |
| Cc: |
| Yu-cheng Yu <yu-cheng.yu-AT-intel.com> |
| Archive-link: |
| Article |
This series introduces CET - Shadow stack
At the high level, shadow stack is:
Allocated from a task's address space with vm_flags VM_SHSTK;
Its PTEs must be read-only and dirty;
Fixed sized, but the default size can be changed by sys admin.
For a forked child, the shadow stack is duplicated when the next
shadow stack access takes place.
For a pthread child, a new shadow stack is allocated.
The signal handler uses the same shadow stack as the main program.
Yu-cheng Yu (10):
x86/cet: User-mode shadow stack support
x86/cet: Introduce WRUSS instruction
x86/cet: Signal handling for shadow stack
x86/cet: Handle thread shadow stack
x86/cet: ELF header parsing of Control Flow Enforcement
x86/cet: Add arch_prctl functions for shadow stack
mm: Prevent mprotect from changing shadow stack
mm: Prevent mremap of shadow stack
mm: Prevent madvise from changing shadow stack
mm: Prevent munmap and remap_file_pages of shadow stack
arch/x86/Kconfig | 4 +
arch/x86/ia32/ia32_signal.c | 5 +
arch/x86/include/asm/cet.h | 48 ++++++
arch/x86/include/asm/disabled-features.h | 8 +-
arch/x86/include/asm/elf.h | 5 +
arch/x86/include/asm/mmu_context.h | 3 +
arch/x86/include/asm/msr-index.h | 14 ++
arch/x86/include/asm/processor.h | 5 +
arch/x86/include/asm/special_insns.h | 44 +++++
arch/x86/include/uapi/asm/elf_property.h | 16 ++
arch/x86/include/uapi/asm/prctl.h | 15 ++
arch/x86/include/uapi/asm/sigcontext.h | 4 +
arch/x86/kernel/Makefile | 4 +
arch/x86/kernel/cet.c | 224 ++++++++++++++++++++++++
arch/x86/kernel/cet_prctl.c | 203 ++++++++++++++++++++++
arch/x86/kernel/cpu/common.c | 24 +++
arch/x86/kernel/elf.c | 236 ++++++++++++++++++++++++++
arch/x86/kernel/process.c | 10 ++
arch/x86/kernel/process_64.c | 7 +
arch/x86/kernel/signal.c | 11 ++
arch/x86/lib/x86-opcode-map.txt | 2 +-
arch/x86/mm/fault.c | 13 +-
fs/binfmt_elf.c | 16 ++
fs/proc/task_mmu.c | 3 +
include/uapi/linux/elf.h | 1 +
mm/madvise.c | 9 +
mm/mmap.c | 13 ++
mm/mprotect.c | 9 +
mm/mremap.c | 5 +-
tools/objtool/arch/x86/lib/x86-opcode-map.txt | 2 +-
30 files changed, 958 insertions(+), 5 deletions(-)
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
--
2.15.1
