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 208D8C55185 for ; Sat, 25 Apr 2020 11:08:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F2071206A2 for ; Sat, 25 Apr 2020 11:08:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="jUETAH5f" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726150AbgDYLIp (ORCPT ); Sat, 25 Apr 2020 07:08:45 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:33303 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726107AbgDYLIo (ORCPT ); Sat, 25 Apr 2020 07:08:44 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1587812923; 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=3Vl9Snukidv/nh3jV4JLaaVbQqkBh6w70+8AM81+TZ8=; b=jUETAH5f3+s62v7ht7y2w3cMvYILeY/CMqqCj712GVE1zwN1Goi10485Hw19kUSTXGjW90 BeeD8pF2J1l/Zp1741NxXg2+tPj5/lqWCTdfmx6FOLS7WLt+lRIJMM+t/U++a+AwA0yMo0 lIV4EW51cqKVUc3Z0/XRj0AeaCjjcWo= 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-105-FyARu1wROJScseorMlweyA-1; Sat, 25 Apr 2020 07:08:37 -0400 X-MC-Unique: FyARu1wROJScseorMlweyA-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 A21B745F; Sat, 25 Apr 2020 11:08:36 +0000 (UTC) Received: from treble.redhat.com (ovpn-114-29.rdu2.redhat.com [10.10.114.29]) by smtp.corp.redhat.com (Postfix) with ESMTP id BCB701ED; Sat, 25 Apr 2020 11:08:32 +0000 (UTC) From: Josh Poimboeuf To: live-patching@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Peter Zijlstra , Jessica Yu , Joe Lawrence Subject: [PATCH v3 00/10] livepatch,module: Remove .klp.arch and module_disable_ro() Date: Sat, 25 Apr 2020 06:07:20 -0500 Message-Id: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. - 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 (7): 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() 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 | 2 - kernel/livepatch/core.c | 177 +++++++++++------- kernel/module.c | 23 +-- 12 files changed, 277 insertions(+), 228 deletions(-) delete mode 100644 arch/x86/kernel/livepatch.c --=20 2.21.1