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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS autolearn=unavailable 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 47985C49361 for ; Wed, 16 Jun 2021 18:30:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2B2D4613F1 for ; Wed, 16 Jun 2021 18:30:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231849AbhFPScz (ORCPT ); Wed, 16 Jun 2021 14:32:55 -0400 Received: from out03.mta.xmission.com ([166.70.13.233]:33884 "EHLO out03.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231352AbhFPScy (ORCPT ); Wed, 16 Jun 2021 14:32:54 -0400 Received: from in02.mta.xmission.com ([166.70.13.52]) by out03.mta.xmission.com with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1ltaJF-00A84z-5r; Wed, 16 Jun 2021 12:30:41 -0600 Received: from ip68-227-160-95.om.om.cox.net ([68.227.160.95] helo=email.xmission.com) by in02.mta.xmission.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1ltaJE-000z9Q-7B; Wed, 16 Jun 2021 12:30:40 -0600 From: ebiederm@xmission.com (Eric W. Biederman) To: Linus Torvalds Cc: Michael Schmitz , linux-arch , Jens Axboe , Oleg Nesterov , Al Viro , Linux Kernel Mailing List , Richard Henderson , Ivan Kokshaysky , Matt Turner , alpha , Geert Uytterhoeven , linux-m68k , Arnd Bergmann , Ley Foon Tan , Tejun Heo , Kees Cook References: <87sg1p30a1.fsf@disp2133> <87pmwsytb3.fsf@disp2133> <87sg1lwhvm.fsf@disp2133> <6e47eff8-d0a4-8390-1222-e975bfbf3a65@gmail.com> <924ec53c-2fd9-2e1c-bbb1-3fda49809be4@gmail.com> <87eed4v2dc.fsf@disp2133> <5929e116-fa61-b211-342a-c706dcb834ca@gmail.com> <87fsxjorgs.fsf@disp2133> <87zgvqor7d.fsf_-_@disp2133> <87mtrpg47k.fsf@disp2133> Date: Wed, 16 Jun 2021 13:29:38 -0500 In-Reply-To: <87mtrpg47k.fsf@disp2133> (Eric W. Biederman's message of "Wed, 16 Jun 2021 11:32:47 -0500") Message-ID: <87pmwlek8d.fsf_-_@disp2133> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-XM-SPF: eid=1ltaJE-000z9Q-7B;;;mid=<87pmwlek8d.fsf_-_@disp2133>;;;hst=in02.mta.xmission.com;;;ip=68.227.160.95;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX1/QcGeYYkSKc73XnoZZIXFLvqc9Us7t81k= X-SA-Exim-Connect-IP: 68.227.160.95 X-SA-Exim-Mail-From: ebiederm@xmission.com Subject: [PATCH 0/2] alpha/ptrace: Improved switch_stack handling X-SA-Exim-Version: 4.2.1 (built Sat, 08 Feb 2020 21:53:50 +0000) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This pair of changes has not received anything beyond build and boot testing. I am posting these changes as they do a much better job of warning of problems and shutting down the security hole. Making them a much better pattern than the my last patch. I hope to get the test cases soon. arch/alpha/include/asm/thread_info.h | 2 ++ arch/alpha/kernel/entry.S | 62 ++++++++++++++++++++++++++-------- arch/alpha/kernel/process.c | 3 ++ arch/alpha/kernel/ptrace.c | 13 +++++-- arch/alpha/kernel/syscalls/syscall.tbl | 8 ++--- 5 files changed, 67 insertions(+), 21 deletions(-) Eric W. Biederman (2): alpha/ptrace: Record and handle the absence of switch_stack alpha/ptrace: Add missing switch_stack frames