From owner-freebsd-stable@freebsd.org Mon Jul 17 22:09:34 2017 Return-Path: Delivered-To: freebsd-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 2451BDA2579 for ; Mon, 17 Jul 2017 22:09:34 +0000 (UTC) (envelope-from markmi@dsl-only.net) Received: from asp.reflexion.net (outbound-mail-210-12.reflexion.net [208.70.210.12]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id AF3CC748AF for ; Mon, 17 Jul 2017 22:09:33 +0000 (UTC) (envelope-from markmi@dsl-only.net) Received: (qmail 9635 invoked from network); 17 Jul 2017 22:14:03 -0000 Received: from unknown (HELO mail-cs-02.app.dca.reflexion.local) (10.81.19.2) by 0 (rfx-qmail) with SMTP; 17 Jul 2017 22:14:03 -0000 Received: by mail-cs-02.app.dca.reflexion.local (Reflexion email security v8.40.1) with SMTP; Mon, 17 Jul 2017 18:09:31 -0400 (EDT) Received: (qmail 2887 invoked from network); 17 Jul 2017 22:09:31 -0000 Received: from unknown (HELO iron2.pdx.net) (69.64.224.71) by 0 (rfx-qmail) with (AES256-SHA encrypted) SMTP; 17 Jul 2017 22:09:31 -0000 Received: from [192.168.1.109] (c-67-170-167-181.hsd1.or.comcast.net [67.170.167.181]) by iron2.pdx.net (Postfix) with ESMTPSA id 1E648EC892D for ; Mon, 17 Jul 2017 15:09:31 -0700 (PDT) From: Mark Millard Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (Mac OS X Mail 10.3 \(3273\)) Subject: Re: stack_guard hardening bsdinstall option in STABLE and 11.1 Message-Id: <047E43D8-9F99-4855-8AAC-882AFBC891C9@dsl-only.net> Date: Mon, 17 Jul 2017 15:09:30 -0700 To: FreeBSD-STABLE Mailing List X-Mailer: Apple Mail (2.3273) X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Jul 2017 22:09:34 -0000 Vlad K. vlad-fbsd at acheronmedia.com wrote on Mon Jul 17 15:03:11 UTC 2017 : > I also asked why wasn't the bsdinstall-er option change > MFC'd after 1 day, two weeks ago, whether it's by omission, simply > ENOTIME, or something else... Given what Konstantin Belousov described (default stack space sizes and apparently guard pages eat into stack space instead of the overall space being bigger by the guard size), I think that would explain not moving from CURRENT: it was known to be a problem. (Although I expect Konstantin Belousov's note here is the first public description of the problem's details.) I agree that you did not get an answer for the other part: > I simply asked if it's safe to assume the sysctl to be an integer in > 11.1 I've not gone through any draft 11.1-release code to check. === Mark Millard markmi at dsl-only.net