From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 21C73C4320E for ; Thu, 22 Jul 2021 20:53:02 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9055360EE0 for ; Thu, 22 Jul 2021 20:53:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 9055360EE0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvack.org Received: by kanga.kvack.org (Postfix) id BA6026B0036; Thu, 22 Jul 2021 16:53:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id B561C6B005D; Thu, 22 Jul 2021 16:53:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A1DBA6B006C; Thu, 22 Jul 2021 16:53:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0026.hostedemail.com [216.40.44.26]) by kanga.kvack.org (Postfix) with ESMTP id 82C9E6B0036 for ; Thu, 22 Jul 2021 16:53:00 -0400 (EDT) Received: from smtpin04.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 1B6D5180AD837 for ; Thu, 22 Jul 2021 20:53:00 +0000 (UTC) X-FDA: 78391423320.04.984B3AD Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by imf19.hostedemail.com (Postfix) with ESMTP id 0A416B000C08 for ; Thu, 22 Jul 2021 20:52:58 +0000 (UTC) X-IronPort-AV: E=McAfee;i="6200,9189,10053"; a="209845034" X-IronPort-AV: E=Sophos;i="5.84,262,1620716400"; d="scan'208";a="209845034" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jul 2021 13:52:57 -0700 X-IronPort-AV: E=Sophos;i="5.84,262,1620716400"; d="scan'208";a="502035406" Received: from yyu32-desk.sc.intel.com ([143.183.136.146]) by fmsmga003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jul 2021 13:52:56 -0700 From: Yu-cheng Yu To: x86@kernel.org, "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, Arnd Bergmann , Andy Lutomirski , Balbir Singh , Borislav Petkov , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit , Oleg Nesterov , Pavel Machek , Peter Zijlstra , Randy Dunlap , "Ravi V. Shankar" , Vedvyas Shanbhogue , Dave Martin , Weijiang Yang , Pengfei Xu , Haitao Huang , Rick P Edgecombe Cc: Yu-cheng Yu Subject: [PATCH v28 00/32] Control-flow Enforcement: Shadow Stack Date: Thu, 22 Jul 2021 13:51:47 -0700 Message-Id: <20210722205219.7934-1-yu-cheng.yu@intel.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 0A416B000C08 X-Stat-Signature: g8f8smia6qk6uqrkcj1uxtcb13i97yo4 Authentication-Results: imf19.hostedemail.com; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=intel.com (policy=none); spf=none (imf19.hostedemail.com: domain of yu-cheng.yu@intel.com has no SPF policy when checking 192.55.52.120) smtp.mailfrom=yu-cheng.yu@intel.com X-HE-Tag: 1626987178-619125 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Control-flow Enforcement (CET) is a new Intel processor feature that bloc= ks return/jump-oriented programming attacks. Details are in "Intel 64 and IA-32 Architectures Software Developer's Manual" [1]. CET can protect applications and the kernel. This series enables only application-level protection, and has three parts: - Shadow stack [2], - Indirect branch tracking, and - Selftests [3]. Linux distributions with CET are available now, and Intel processors with= CET are already on the market. It would be nice if CET support can be accept= ed into the kernel. Changes in v28: - Rebase to Linus tree v5.14-rc2. - Patch #1: Update Document to indicate no-user-shstk also disables IBT. - Patch #23: Update shstk_setup() with wrmsrl_safe(). Update return valu= e. - Patch #25: Split out copy_thread() changes. Add support for old clone(= ). Add comments. - Add comments for get_xsave_addr() (Patch #25, #26). Changes in v27: - Eliminate signal context extension structure. Simplify signal handling= . - Add a new patch to move VM_UFFD_MINOR_BIT to 38. - Smaller changes are in each patch's log. - Rebase to Linus tree v5.13-rc2. [1] Intel 64 and IA-32 Architectures Software Developer's Manual: https://software.intel.com/en-us/download/intel-64-and-ia-32- architectures-sdm-combined-volumes-1-2a-2b-2c-2d-3a-3b-3c-3d-and-4 [2] Shadow Stack patches v27: https://lore.kernel.org/r/20210521221211.29077-1-yu-cheng.yu@intel.co= m/ [3] I am holding off the selftests changes and working to get Reviewed-by= 's. The earlier version of the selftests patches: https://lkml.kernel.org/r/20200521211720.20236-1-yu-cheng.yu@intel.co= m/ [4] The kernel ptrace patch is tested with an Intel-internal updated GDB. I am holding off the kernel ptrace patch to re-test it with my earlie= r patch for fixing regset holes. Yu-cheng Yu (32): Documentation/x86: Add CET description x86/cet/shstk: Add Kconfig option for Shadow Stack x86/cpufeatures: Add CET CPU feature flags for Control-flow Enforcement Technology (CET) x86/cpufeatures: Introduce CPU setup and option parsing for CET x86/fpu/xstate: Introduce CET MSR and XSAVES supervisor states x86/cet: Add control-protection fault handler x86/mm: Remove _PAGE_DIRTY from kernel RO pages x86/mm: Move pmd_write(), pud_write() up in the file x86/mm: Introduce _PAGE_COW drm/i915/gvt: Change _PAGE_DIRTY to _PAGE_DIRTY_BITS x86/mm: Update pte_modify for _PAGE_COW x86/mm: Update ptep_set_wrprotect() and pmdp_set_wrprotect() for transition from _PAGE_DIRTY to _PAGE_COW mm: Move VM_UFFD_MINOR_BIT from 37 to 38 mm: Introduce VM_SHADOW_STACK for shadow stack memory x86/mm: Shadow Stack page fault error checking x86/mm: Update maybe_mkwrite() for shadow stack mm: Fixup places that call pte_mkwrite() directly mm: Add guard pages around a shadow stack. mm/mmap: Add shadow stack pages to memory accounting mm: Update can_follow_write_pte() for shadow stack mm/mprotect: Exclude shadow stack from preserve_write mm: Re-introduce vm_flags to do_mmap() x86/cet/shstk: Add user-mode shadow stack support x86/process: Change copy_thread() argument 'arg' to 'stack_size' x86/cet/shstk: Handle thread shadow stack x86/cet/shstk: Introduce shadow stack token setup/verify routines x86/cet/shstk: Handle signals for shadow stack ELF: Introduce arch_setup_elf_property() x86/cet/shstk: Add arch_prctl functions for shadow stack mm: Move arch_calc_vm_prot_bits() to arch/x86/include/asm/mman.h mm: Update arch_validate_flags() to test vma anonymous mm: Introduce PROT_SHADOW_STACK for shadow stack .../admin-guide/kernel-parameters.txt | 7 + Documentation/filesystems/proc.rst | 1 + Documentation/x86/index.rst | 1 + Documentation/x86/intel_cet.rst | 139 +++++++ arch/arm64/include/asm/elf.h | 5 + arch/arm64/include/asm/mman.h | 4 +- arch/sparc/include/asm/mman.h | 4 +- arch/x86/Kconfig | 24 ++ arch/x86/Kconfig.assembler | 5 + arch/x86/ia32/ia32_signal.c | 25 +- arch/x86/include/asm/cet.h | 53 +++ arch/x86/include/asm/cpufeatures.h | 2 + arch/x86/include/asm/disabled-features.h | 8 +- arch/x86/include/asm/elf.h | 11 + arch/x86/include/asm/fpu/types.h | 23 +- arch/x86/include/asm/fpu/xstate.h | 6 +- arch/x86/include/asm/idtentry.h | 4 + arch/x86/include/asm/mman.h | 88 ++++ arch/x86/include/asm/mmu_context.h | 3 + arch/x86/include/asm/msr-index.h | 19 + arch/x86/include/asm/page_types.h | 7 + arch/x86/include/asm/pgtable.h | 300 ++++++++++++-- arch/x86/include/asm/pgtable_types.h | 48 ++- arch/x86/include/asm/processor.h | 5 + arch/x86/include/asm/special_insns.h | 30 ++ arch/x86/include/asm/trap_pf.h | 2 + arch/x86/include/uapi/asm/mman.h | 28 +- arch/x86/include/uapi/asm/prctl.h | 4 + arch/x86/include/uapi/asm/processor-flags.h | 2 + arch/x86/kernel/Makefile | 2 + arch/x86/kernel/cet_prctl.c | 60 +++ arch/x86/kernel/cpu/common.c | 14 + arch/x86/kernel/cpu/cpuid-deps.c | 2 + arch/x86/kernel/fpu/xstate.c | 11 +- arch/x86/kernel/idt.c | 4 + arch/x86/kernel/process.c | 21 +- arch/x86/kernel/process_64.c | 27 ++ arch/x86/kernel/shstk.c | 375 ++++++++++++++++++ arch/x86/kernel/signal.c | 13 + arch/x86/kernel/signal_compat.c | 2 +- arch/x86/kernel/traps.c | 63 +++ arch/x86/mm/fault.c | 19 + arch/x86/mm/mmap.c | 48 +++ arch/x86/mm/pat/set_memory.c | 2 +- arch/x86/mm/pgtable.c | 25 ++ drivers/gpu/drm/i915/gvt/gtt.c | 2 +- fs/aio.c | 2 +- fs/binfmt_elf.c | 4 + fs/proc/task_mmu.c | 3 + include/linux/elf.h | 6 + include/linux/mm.h | 20 +- include/linux/mman.h | 2 +- include/linux/pgtable.h | 7 + include/uapi/asm-generic/siginfo.h | 3 +- include/uapi/linux/elf.h | 14 + ipc/shm.c | 2 +- mm/gup.c | 16 +- mm/huge_memory.c | 27 +- mm/memory.c | 5 +- mm/migrate.c | 3 +- mm/mmap.c | 17 +- mm/mprotect.c | 11 +- mm/nommu.c | 4 +- mm/util.c | 2 +- 64 files changed, 1581 insertions(+), 115 deletions(-) create mode 100644 Documentation/x86/intel_cet.rst create mode 100644 arch/x86/include/asm/cet.h create mode 100644 arch/x86/include/asm/mman.h create mode 100644 arch/x86/kernel/cet_prctl.c create mode 100644 arch/x86/kernel/shstk.c --=20 2.21.0