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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 F0816C83000 for ; Wed, 29 Apr 2020 15:25:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CE5BB208FE for ; Wed, 29 Apr 2020 15:25:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Rkh5LCfZ" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727103AbgD2PZP (ORCPT ); Wed, 29 Apr 2020 11:25:15 -0400 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:41942 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727030AbgD2PZP (ORCPT ); Wed, 29 Apr 2020 11:25:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1588173914; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=idVKSiABjSNcmACNvJ+0e2upfnSy5o5PlTD947BRr1Y=; b=Rkh5LCfZPmazla0dA6RqAeeseD0j36j67oI8ifDaY9F5JLPvh77LTnfRh1gor7qRXW+PIr MZOiPRODwgLXC3Xc1ER2acnkHgPMzUj+ARrtXvoEunpc+HoknYy910EfyI2mSvZMNc5mHa cvacIMfcT3DBDphP8n047/6qZbZ/a9A= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-69-w8wnoM3MPJ6qwrUmSm7-hA-1; Wed, 29 Apr 2020 11:25:10 -0400 X-MC-Unique: w8wnoM3MPJ6qwrUmSm7-hA-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 68C7C8F294B; Wed, 29 Apr 2020 15:25:01 +0000 (UTC) Received: from treble.redhat.com (ovpn-113-19.rdu2.redhat.com [10.10.113.19]) by smtp.corp.redhat.com (Postfix) with ESMTP id C383A605CB; Wed, 29 Apr 2020 15:24:57 +0000 (UTC) From: Josh Poimboeuf To: live-patching@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Peter Zijlstra , Jessica Yu , Joe Lawrence , Miroslav Benes Subject: [PATCH v4 00/11] livepatch,module: Remove .klp.arch and module_disable_ro() Date: Wed, 29 Apr 2020 10:24:42 -0500 Message-Id: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Content-Transfer-Encoding: quoted-printable Sender: live-patching-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: live-patching@vger.kernel.org v4: - Fixed rebase bisection regression [Miroslav] - Made module_enable_ro() static [Jessica] - Added Acked-by's v3: - klp: split klp_write_relocations() into object/section specific functions [joe] - s390: fix plt/got writes [joe] - s390: remove text_mutex usage [mbenes] - x86: do text_poke_sync() before releasing text_mutex [peterz] - split x86 text_mutex changes into separate patch [mbenes] v2: - add vmlinux.ko check [peterz] - remove 'klp_object' forward declaration [mbenes] - use text_mutex [jeyu] - fix documentation TOC [jeyu] - fix s390 issues [mbenes] - upstream kpatch-build now supports this (though it's only enabled for Linux >=3D 5.8) These patches add simplifications and improvements for some issues Peter found six months ago, as part of his non-writable text code (W^X) cleanups. Highlights: - Remove the livepatch arch-specific .klp.arch sections, which were used to do paravirt patching and alternatives patching for livepatch replacement code. - Add support for jump labels in patched code (only for static keys which live in vmlinux). - Remove the last module_disable_ro() usage. For more background, see this thread: https://lkml.kernel.org/r/20191021135312.jbbxsuipxldocdjk@treble This has been tested with kpatch-build integration tests and klp-convert selftests. Josh Poimboeuf (8): livepatch: Disallow vmlinux.ko livepatch: Apply vmlinux-specific KLP relocations early livepatch: Prevent module-specific KLP rela sections from referencing vmlinux symbols s390: Change s390_kernel_write() return type to match memcpy() livepatch: Remove module_disable_ro() usage module: Remove module_disable_ro() x86/module: Use text_mutex in apply_relocate_add() module: Make module_enable_ro() static again Peter Zijlstra (3): livepatch: Remove .klp.arch s390/module: Use s390_kernel_write() for late relocations x86/module: Use text_poke() for late relocations Documentation/livepatch/module-elf-format.rst | 15 +- arch/s390/include/asm/uaccess.h | 2 +- arch/s390/kernel/module.c | 147 +++++++++------ arch/s390/mm/maccess.c | 9 +- arch/um/kernel/um_arch.c | 16 ++ arch/x86/kernel/Makefile | 1 - arch/x86/kernel/livepatch.c | 53 ------ arch/x86/kernel/module.c | 43 ++++- include/linux/livepatch.h | 17 +- include/linux/module.h | 8 - kernel/livepatch/core.c | 177 +++++++++++------- kernel/module.c | 27 +-- 12 files changed, 279 insertions(+), 236 deletions(-) delete mode 100644 arch/x86/kernel/livepatch.c --=20 2.21.1