From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable autolearn_force=no version=3.4.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 3047F7D8D7 for ; Thu, 11 Oct 2018 15:23:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728827AbeJKWtW (ORCPT ); Thu, 11 Oct 2018 18:49:22 -0400 Received: from mga18.intel.com ([134.134.136.126]:64714 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728528AbeJKWtV (ORCPT ); Thu, 11 Oct 2018 18:49:21 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Oct 2018 08:21:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.54,368,1534834800"; d="scan'208";a="77271614" Received: from 2b52.sc.intel.com ([143.183.136.147]) by fmsmga007.fm.intel.com with ESMTP; 11 Oct 2018 08:21:42 -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 , 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 Cc: Yu-cheng Yu Subject: [PATCH v5 00/11] Control Flow Enforcement: Branch Tracking, PTRACE Date: Thu, 11 Oct 2018 08:16:43 -0700 Message-Id: <20181011151654.27221-1-yu-cheng.yu@intel.com> X-Mailer: git-send-email 2.17.1 Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org 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