From owner-freebsd-current@freebsd.org Sun Jul 2 02:01:42 2017 Return-Path: Delivered-To: freebsd-current@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 B54B6D9888E for ; Sun, 2 Jul 2017 02:01:42 +0000 (UTC) (envelope-from shawn.webb@hardenedbsd.org) Received: from mail-wm0-x22a.google.com (mail-wm0-x22a.google.com [IPv6:2a00:1450:400c:c09::22a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 44F7C7A629 for ; Sun, 2 Jul 2017 02:01:42 +0000 (UTC) (envelope-from shawn.webb@hardenedbsd.org) Received: by mail-wm0-x22a.google.com with SMTP id i127so77767061wma.0 for ; Sat, 01 Jul 2017 19:01:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=hardenedbsd-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:mime-version:content-disposition :user-agent; bh=4QxFrfHkR2Swq8tdD6NKmMDyURalDTmsLvz+upTfUE4=; b=KlNHhgVEYVONX/4P4RxiZZPk9CogGy8Cza+vb6qierJY0XH5gUJTnueiWsrEB3NbR/ ZouGx8VoEo4cCVt4znOFlHdbLcVhlcJBx+2PrfXTaQIVnZ8+1z3szdIKcSDctwqJCJLg 9k+yF4CZDkZwSIiPENbwYIBl3wEDldEBDTtTxEfT90SpW/sWYWt0xb8EFu132SeYzOnq wWonm1dSNFzf2dIzt2xPRv7+Uindc43avjdZ0THHSz/XX8wyKLn0X/ChLYGXn+fBBFs6 bdH/0Wb2TgghvJKuQkIsJszmm2xzMemM9pilWF0cENzD/DE0nxDHPR22zj0JsYogrvVL 1xaQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:mime-version :content-disposition:user-agent; bh=4QxFrfHkR2Swq8tdD6NKmMDyURalDTmsLvz+upTfUE4=; b=T/tjgQdFR2m3cOv7mEBeoWJbPxOINtPpFqH/xbU9FgENwM+Wu987cn372qB8oAfRUc BqWO9RaZXff12w2qLwzvvMbWCotnZDvvVL3W5s0bTVPrgoIMqHJenjT3x9skjIGAA9ys TQKUjvdB61sdeugH/n/9oR+K0RtY7Gv2uuJ5aFBXRPErHzJf3ZWAFxsOi7+Y9I2plM1a kmVe2JOJT+4lZKD4JmL61NyX4sy8Mk6yvITlPIRlmFLtcBMySVkJc3VJy3IrAPkopBXi 5JL4zaSr1YOAdNwu5jhTz5Xg3qZPSvf9FRJnYpSRxWluvAMF42oZgXRVi8sHEmLpQlOj A3NA== X-Gm-Message-State: AKS2vOxHZNzlqKccYTAsjYqgXW1I2Go9FdM8E3wu27N/aJs910K5w9m9 F2jzrmIgyQkI8t/8XzpAGm2A6t8R0yNkUi+GMC3da2cbB0Cgb2yQJuxL2rRopu7xXEXWO4xl6NB x6cH5OEgN5bSXK6zgRvT6baEVwqHaxPtE1zPBhjL65PX5BcJJQaBZ8C/MleYSPwfp5bIR5KR/oA == X-Received: by 10.28.232.141 with SMTP id f13mr18533692wmi.59.1498960900128; Sat, 01 Jul 2017 19:01:40 -0700 (PDT) Received: from mutt-hbsd (pool-100-16-230-154.bltmmd.fios.verizon.net. [100.16.230.154]) by smtp.gmail.com with ESMTPSA id f21sm15603547wra.5.2017.07.01.19.01.38 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sat, 01 Jul 2017 19:01:39 -0700 (PDT) Date: Sat, 1 Jul 2017 22:01:35 -0400 From: Shawn Webb To: freebsd-current@freebsd.org Cc: kib@freebsd.org Subject: Possible to set security.bsd.stack_guard_page to a negative value Message-ID: <20170702020135.3bc53sfdcflgzp7y@mutt-hbsd> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="7odqm5z4ll6qwku4" Content-Disposition: inline X-Operating-System: FreeBSD mutt-hbsd 12.0-CURRENT FreeBSD 12.0-CURRENT X-PGP-Key: http://pgp.mit.edu/pks/lookup?op=vindex&search=0x6A84658F52456EEE User-Agent: NeoMutt/20170609 (1.8.3) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 02 Jul 2017 02:01:42 -0000 --7odqm5z4ll6qwku4 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Even though it'd be a stupid thing to do, the security.bsd.stack_guard_page sysctl node can be set to a negative integer value. This will cause all applications to crash with SIGABRT. --=20 Shawn Webb Cofounder and Security Engineer HardenedBSD GPG Key ID: 0x6A84658F52456EEE GPG Key Fingerprint: 2ABA B6BD EF6A F486 BE89 3D9E 6A84 658F 5245 6EEE --7odqm5z4ll6qwku4 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEKrq2ve9q9Ia+iT2eaoRlj1JFbu4FAllYU/wACgkQaoRlj1JF bu64mxAAryQi1Pg59K7PxqOIzjSq/4OTz5N8KCsEyVp7gUndlcIj7gmMnNhsVW0P dHMOu4yRp166SHd+naqJoa55cSpZ8Iu3qyXU0KnwRaquBPvzsUaYeH14Jy4CAyBu EeuXXG+JHwDGTx6dQm6ls6joxnDEcJe58Kq4igSywlXpIJlRUSfTnUhOmZX+dzi9 V65Dyu98rANC2xGCsZuYFeqDIWui344PODL9MegwZIf1l6A8fCCaOHTmak+9zH6U 8Fw1e3l2No4rgUne60tBe4CS9oCpHS/pq96Kgxe5/Sk0+tq07YAkm9lEcaSoqkOI Sh8EDNo0bF7HCZYxuPGEwiBuhw7C8DEGVjshoU3BU3o6hcutzjzIkofZPyErkYV5 v713SHOPBpP1KJ1GMbHlob5GuUtkYxZyHPvBfotkDTtNqRYh50YGAt6fdelx7eat OiTYdFyeiS0WAo1ieBK59UYqQ3H1R6b6uqn+MXLMkPaYT8w7Z9cicL+fiiMDk0d3 jneurFZmW3HVq/t4wZOxfsG/IWEMYuOSfxHZ8oE1xaW3YgvPx07C3ibWcTUmI7qS w4x+1kHFwcYf0oOUTuUM+c2LftssUf6WAMShXi5NP1fP0J+lmnKvMsG4PYrGhIJI lLy72X6YEwmLa5nubTn69h7eEbsea9tzA2VJ4yH1D22/Hat4+IU= =q5YQ -----END PGP SIGNATURE----- --7odqm5z4ll6qwku4--