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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 44044C433EF for ; Fri, 8 Jul 2022 22:25:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238081AbiGHWZn (ORCPT ); Fri, 8 Jul 2022 18:25:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49450 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237684AbiGHWZl (ORCPT ); Fri, 8 Jul 2022 18:25:41 -0400 Received: from out01.mta.xmission.com (out01.mta.xmission.com [166.70.13.231]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5CD0FA2E61 for ; Fri, 8 Jul 2022 15:25:40 -0700 (PDT) Received: from in01.mta.xmission.com ([166.70.13.51]:59826) by out01.mta.xmission.com with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1o9wPq-004o3a-Ov; Fri, 08 Jul 2022 16:25:38 -0600 Received: from ip68-227-174-4.om.om.cox.net ([68.227.174.4]:43408 helo=email.froward.int.ebiederm.org.xmission.com) by in01.mta.xmission.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.93) (envelope-from ) id 1o9wPp-00AEXn-O8; Fri, 08 Jul 2022 16:25:38 -0600 From: "Eric W. Biederman" To: Keno Fischer Cc: linux-kernel@vger.kernel.org, mingo@kernel.org, bigeasy@linutronix.de, Peter Zijlstra , Jann Horn , Kees Cook , Alexander Gordeev , Robert O'Callahan , Kyle Huey , Oleg Nesterov References: <20220421150248.667412396@infradead.org> <20220421150654.817117821@infradead.org> <87czhap9dy.fsf@email.froward.int.ebiederm.org> <878rrrh32q.fsf_-_@email.froward.int.ebiederm.org> <87k0b7v9yk.fsf_-_@email.froward.int.ebiederm.org> <87k0b0apne.fsf_-_@email.froward.int.ebiederm.org> <87a6bv6dl6.fsf_-_@email.froward.int.ebiederm.org> <87r13gd4xy.fsf_-_@email.froward.int.ebiederm.org> Date: Fri, 08 Jul 2022 17:25:31 -0500 In-Reply-To: <87r13gd4xy.fsf_-_@email.froward.int.ebiederm.org> (Eric W. Biederman's message of "Wed, 22 Jun 2022 11:43:37 -0500") Message-ID: <87edyvgs2s.fsf@email.froward.int.ebiederm.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-XM-SPF: eid=1o9wPp-00AEXn-O8;;;mid=<87edyvgs2s.fsf@email.froward.int.ebiederm.org>;;;hst=in01.mta.xmission.com;;;ip=68.227.174.4;;;frm=ebiederm@xmission.com;;;spf=softfail X-XM-AID: U2FsdGVkX1/stSDpTvjFDPy2IhraphYlslMz8o/ejjI= X-SA-Exim-Connect-IP: 68.227.174.4 X-SA-Exim-Mail-From: ebiederm@xmission.com Subject: Re: [PATCH 0/3] ptrace: Stop supporting SIGKILL for PTRACE_EVENT_EXIT X-SA-Exim-Version: 4.2.1 (built Sat, 08 Feb 2020 21:53:50 +0000) X-SA-Exim-Scanned: Yes (on in01.mta.xmission.com) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "Eric W. Biederman" writes: > Recently I had a conversation where it was pointed out to me that > SIGKILL sent to a tracee stropped in PTRACE_EVENT_EXIT is quite > difficult for a tracer to handle. > > Keeping SIGKILL working for anything after the process has been killed > is also a real pain from an implementation point of view. > > So I am attempting to remove this wart in the userspace API and see > if anyone cares. > > Eric W. Biederman (3): > signal: Ensure SIGNAL_GROUP_EXIT gets set in do_group_exit > signal: Guarantee that SIGNAL_GROUP_EXIT is set on process exit > signal: Drop signals received after a fatal signal has been processed > > fs/coredump.c | 2 +- > include/linux/sched/signal.h | 1 + > kernel/exit.c | 20 +++++++++++++++++++- > kernel/fork.c | 2 ++ > kernel/signal.c | 3 ++- > 5 files changed, 25 insertions(+), 3 deletions(-) RR folks any comments? Did I properly understand what Keno Fischer was asking for when we talked in person? Eric