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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6232BC433EF for ; Fri, 19 Nov 2021 16:03:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 466A961221 for ; Fri, 19 Nov 2021 16:03:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236186AbhKSQG4 (ORCPT ); Fri, 19 Nov 2021 11:06:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53036 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234918AbhKSQGy (ORCPT ); Fri, 19 Nov 2021 11:06:54 -0500 Received: from mail-pl1-x62a.google.com (mail-pl1-x62a.google.com [IPv6:2607:f8b0:4864:20::62a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4C99DC06173E for ; Fri, 19 Nov 2021 08:03:52 -0800 (PST) Received: by mail-pl1-x62a.google.com with SMTP id z6so7267135plk.6 for ; Fri, 19 Nov 2021 08:03:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kylehuey.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=dVl1y7dz5yzJ4ISPiOpYJmuusOkr3uxzfmH+anrgaX0=; b=lNLzz5grJcL0EywAhMja05SHW9eUygNXTKtZgQTXHqcNE3IcqDLr7U1Bc/rHf3k6Nk 1mQ3kHTclvYs0jl3aSAbbDLNi6nu0sJX30vXpGyuO4zUJ+QE32QxlqFT6XWNep4MMz3W hX7TiTqGvoo24R7EPvxePcX71JCNKLq9DLI+G+pE7y7GACDF3kPbqfPgGeg6PTMk0Tl3 r922k7X3j6boaoG3JHogizBD7db0bKuztYPCXmqGV3N77n8dkB14ZEuRVo6VSQzcsJfe uTbYjndK+PCGFaSP9fsT3WWSO1WEW/jkbuT4OaKIqs0DZCSIQLiOI7G/82vvUiNhqBiq IpCw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=dVl1y7dz5yzJ4ISPiOpYJmuusOkr3uxzfmH+anrgaX0=; b=Z4T1IjG9+TNmyK7T3L3EMe6sTIPcy+p+kP5D/L38Bqei+uTWHYXYL8pRqS5vb7wZgi BmkqQz4+7d1oGzxCD+Iu7vGTwz1JKUCJDb2F2/4cheSGYdzMGzQP1Nv5hVsexAI4RbeB b10Biv6zdIQp/ZUFDezyo2YnSO7tPUJ38siqldOi0IaWMv3b54WPqadbmI/PjIVljPMf 26cwm6/00PMXXDiOdNwYIHhZn9vrEEjkfpP2WdaGMwvRDjL87rHVVxttUulla8S0+Jbu YmDJ6D71ZdeqeOhu9vpIAk0/k3wmDlfyXtUl/qq0OWWMIe35zpwgD6rHL4Z8G8cLPe2x 611w== X-Gm-Message-State: AOAM530WrIN3mDofcWzj3rLrMHodsOVCgkO8sixZ5Oy5XZyt9GsxOD7m uFeX3t/7xSe8RPR3cpxTQVyEDQ== X-Google-Smtp-Source: ABdhPJy0I7OeJBwYUukJb+gm4HMPcsPZFQFz2Io92uNtCvJbhNfZYOtwBBIchHRWXe+X3HstC7hC4A== X-Received: by 2002:a17:90b:3a83:: with SMTP id om3mr778565pjb.211.1637337831717; Fri, 19 Nov 2021 08:03:51 -0800 (PST) Received: from minbar.home.kylehuey.com (c-71-198-251-229.hsd1.ca.comcast.net. [71.198.251.229]) by smtp.gmail.com with ESMTPSA id o4sm11067326pjq.23.2021.11.19.08.03.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Nov 2021 08:03:50 -0800 (PST) From: Kyle Huey X-Google-Original-From: Kyle Huey To: "Eric W . Biederman" Cc: linux-kernel@vger.kernel.org, Linus Torvalds , Oleg Nesterov , Al Viro , linux-api@vger.kernel.org, Kees Cook , Robert O'Callahan Subject: Re: [PATCH 6/6] coredump: Limit coredumps to a single thread group Date: Fri, 19 Nov 2021 08:03:48 -0800 Message-Id: <20211119160348.22409-1-khuey@kylehuey.com> X-Mailer: git-send-email 2.34.0 In-Reply-To: <87y27mvnke.fsf@disp2133> References: <87y27mvnke.fsf@disp2133> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > Solve this by making a userspace visible change to only kill a single > process/thread group. [...] With LinuxThreads long gone I don't > expect anyone to have a notice this behavior change in practice. FWIW rr's test suite does have an explicit test that we correctly record and replay the old behavior. We don't actually care what that behavior is though, so we will update our tests. - Kyle