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,URIBL_BLOCKED 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 B888DC10F26 for ; Wed, 1 Apr 2020 21:06:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 965732054F for ; Wed, 1 Apr 2020 21:06:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732866AbgDAVGE (ORCPT ); Wed, 1 Apr 2020 17:06:04 -0400 Received: from out03.mta.xmission.com ([166.70.13.233]:38318 "EHLO out03.mta.xmission.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732337AbgDAVGE (ORCPT ); Wed, 1 Apr 2020 17:06:04 -0400 Received: from in02.mta.xmission.com ([166.70.13.52]) by out03.mta.xmission.com with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1jJkYl-0004ja-6c; Wed, 01 Apr 2020 15:06:03 -0600 Received: from ip68-227-160-95.om.om.cox.net ([68.227.160.95] helo=x220.xmission.com) by in02.mta.xmission.com with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.87) (envelope-from ) id 1jJkYk-0006fM-EY; Wed, 01 Apr 2020 15:06:03 -0600 From: ebiederm@xmission.com (Eric W. Biederman) To: Linus Torvalds Cc: Adam Zabrocki , Linux Kernel Mailing List , Kernel Hardening , Jann Horn , Oleg Nesterov , Andy Lutomirski , Bernd Edlinger , Kees Cook , Andrew Morton , stable References: <20200324215049.GA3710@pi3.com.pl> <202003291528.730A329@keescook> <87zhbvlyq7.fsf_-_@x220.int.ebiederm.org> Date: Wed, 01 Apr 2020 16:03:20 -0500 In-Reply-To: (Linus Torvalds's message of "Wed, 1 Apr 2020 13:55:11 -0700") Message-ID: <87sghmnckn.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=1jJkYk-0006fM-EY;;;mid=<87sghmnckn.fsf@x220.int.ebiederm.org>;;;hst=in02.mta.xmission.com;;;ip=68.227.160.95;;;frm=ebiederm@xmission.com;;;spf=neutral X-XM-AID: U2FsdGVkX1+c7hhxNri2jefkPydPIS+82k6pfB21yV8= X-SA-Exim-Connect-IP: 68.227.160.95 X-SA-Exim-Mail-From: ebiederm@xmission.com Subject: Re: [PATCH] signal: Extend exec_id to 64bits X-SA-Exim-Version: 4.2.1 (built Thu, 05 May 2016 13:38:54 -0600) X-SA-Exim-Scanned: Yes (on in02.mta.xmission.com) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Linus Torvalds writes: > On Wed, Apr 1, 2020 at 1:50 PM Eric W. Biederman wrote: >> >> I have updated the update of exec_id on exec to use WRITE_ONCE >> and the read of exec_id in do_notify_parent to use READ_ONCE >> to make it clear that there is no locking between these two >> locations. > > Ack, makes sense to me. > > Just put it in your branch, this doesn't look urgent, considering that > it's something that has been around forever. Done Eric