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=-0.8 required=3.0 tests=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 9CE9AC3F2D0 for ; Tue, 10 Mar 2020 15:38:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 813FA20675 for ; Tue, 10 Mar 2020 15:38:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726736AbgCJPiF (ORCPT ); Tue, 10 Mar 2020 11:38:05 -0400 Received: from out03.mta.xmission.com ([166.70.13.233]:44554 "EHLO out03.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726380AbgCJPiF (ORCPT ); Tue, 10 Mar 2020 11:38:05 -0400 Received: from in01.mta.xmission.com ([166.70.13.51]) by out03.mta.xmission.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jBgxE-0001AS-RF; Tue, 10 Mar 2020 09:38:00 -0600 Received: from ip68-227-160-95.om.om.cox.net ([68.227.160.95] helo=x220.xmission.com) by in01.mta.xmission.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.87) (envelope-from ) id 1jBgxD-0000sr-Jr; Tue, 10 Mar 2020 09:38:00 -0600 From: ebiederm@xmission.com (Eric W. Biederman) To: Bernd Edlinger Cc: Christian Brauner , Kees Cook , Jann Horn , Jonathan Corbet , Alexander Viro , Andrew Morton , Alexey Dobriyan , Thomas Gleixner , Oleg Nesterov , Frederic Weisbecker , Andrei Vagin , Ingo Molnar , "Peter Zijlstra \(Intel\)" , Yuyang Du , David Hildenbrand , Sebastian Andrzej Siewior , Anshuman Khandual , David Howells , James Morris , Greg Kroah-Hartman , Shakeel Butt , Jason Gunthorpe , Christian Kellner , Andrea Arcangeli , Aleksa Sarai , "Dmitry V. Levin" , "linux-doc\@vger.kernel.org" , "linux-kernel\@vger.kernel.org" , "linux-fsdevel\@vger.kernel.org" , "linux-mm\@kvack.org" , "stable\@vger.kernel.org" , "linux-api\@vger.kernel.org" References: <87r1y8dqqz.fsf@x220.int.ebiederm.org> <87tv32cxmf.fsf_-_@x220.int.ebiederm.org> <87v9ne5y4y.fsf_-_@x220.int.ebiederm.org> <87zhcq4jdj.fsf_-_@x220.int.ebiederm.org> <878sk94eay.fsf@x220.int.ebiederm.org> <87r1y12yc7.fsf@x220.int.ebiederm.org> <87k13t2xpd.fsf@x220.int.ebiederm.org> <87d09l2x5n.fsf@x220.int.ebiederm.org> <871rq12vxu.fsf@x220.int.ebiederm.org> <877dzt1fnf.fsf@x220.int.ebiederm.org> Date: Tue, 10 Mar 2020 10:35:41 -0500 In-Reply-To: (Bernd Edlinger's message of "Tue, 10 Mar 2020 14:43:21 +0100") Message-ID: <875zfcxlwy.fsf@x220.int.ebiederm.org> 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=1jBgxD-0000sr-Jr;;;mid=<875zfcxlwy.fsf@x220.int.ebiederm.org>;;;hst=in01.mta.xmission.com;;;ip=68.227.160.95;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX18NOUXxtLcovq85kyfc0MbvMJLCG3mnAmU= X-SA-Exim-Connect-IP: 68.227.160.95 X-SA-Exim-Mail-From: ebiederm@xmission.com Subject: Re: [PATCH 0/4] Use new infrastructure to fix deadlocks in execve X-SA-Exim-Version: 4.2.1 (built Thu, 05 May 2016 13:38:54 -0600) X-SA-Exim-Scanned: Yes (on in01.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Bernd Edlinger writes: > This is a follow up on Eric's patch series to > fix the deadlocks observed with ptracing when execve > in multi-threaded applications. > > This fixes the simple and most important case where > the cred_guard_mutex causes strace to deadlock. > > This also adds a test case (which is only partially > fixed so far, the rest of the fixes will follow > soon). > > Two trivial comment fixes are also included. > > Bernd Edlinger (4): > exec: Fix a deadlock in ptrace > selftests/ptrace: add test cases for dead-locks > mm: docs: Fix a comment in process_vm_rw_core > kernel: doc: remove outdated comment in prepare_kernel_cred > > kernel/cred.c | 2 - > kernel/fork.c | 4 +- > mm/process_vm_access.c | 2 +- > tools/testing/selftests/ptrace/Makefile | 4 +- > tools/testing/selftests/ptrace/vmaccess.c | 86 +++++++++++++++++++++++++++++++ > 5 files changed, 91 insertions(+), 7 deletions(-) > create mode 100644 tools/testing/selftests/ptrace/vmaccess.c Applied. Thank you, Eric