From owner-freebsd-stable@FreeBSD.ORG Wed Jun 15 14:31:41 2011 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 9DDDA1065674; Wed, 15 Jun 2011 14:31:41 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from mail.zoral.com.ua (mx0.zoral.com.ua [91.193.166.200]) by mx1.freebsd.org (Postfix) with ESMTP id 14DD68FC12; Wed, 15 Jun 2011 14:31:40 +0000 (UTC) Received: from deviant.kiev.zoral.com.ua (root@deviant.kiev.zoral.com.ua [10.1.1.148]) by mail.zoral.com.ua (8.14.2/8.14.2) with ESMTP id p5FE0qsk001186 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 15 Jun 2011 17:00:52 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: from deviant.kiev.zoral.com.ua (kostik@localhost [127.0.0.1]) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4) with ESMTP id p5FE0qfb081465; Wed, 15 Jun 2011 17:00:52 +0300 (EEST) (envelope-from kostikbel@gmail.com) Received: (from kostik@localhost) by deviant.kiev.zoral.com.ua (8.14.4/8.14.4/Submit) id p5FE0qNt081464; Wed, 15 Jun 2011 17:00:52 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: deviant.kiev.zoral.com.ua: kostik set sender to kostikbel@gmail.com using -f Date: Wed, 15 Jun 2011 17:00:51 +0300 From: Kostik Belousov To: Joerg Wunsch Message-ID: <20110615140051.GL48734@deviant.kiev.zoral.com.ua> References: <20110615135704.GQ23206@uriah.heep.sax.de> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="+YUTx28Pm90FnKYj" Content-Disposition: inline In-Reply-To: <20110615135704.GQ23206@uriah.heep.sax.de> User-Agent: Mutt/1.4.2.3i X-Virus-Scanned: clamav-milter 0.95.2 at skuns.kiev.zoral.com.ua X-Virus-Status: Clean X-Spam-Status: No, score=-3.3 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00, DNS_FROM_OPENWHOIS autolearn=no version=3.2.5 X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on skuns.kiev.zoral.com.ua Cc: freebsd-stable@freebsd.org Subject: Re: doscmd under 8-stable, anyone? X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Jun 2011 14:31:41 -0000 --+YUTx28Pm90FnKYj Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Jun 15, 2011 at 03:57:05PM +0200, Joerg Wunsch wrote: > When trying to use doscmd on 8-stable, all I get is: >=20 > Error mapping HMA, HMA disabled: : Invalid argument > Segmentation fault (core dumped) >=20 > The segfault happens at the end of mem_init(), when the allocated DOS > memory (which is located at virtual address 0) is attempted to be > written to. Apparently, the mmap() failure that causes the "HMA > disabled" message is actually a fatal error rather than a benign one > the could be ignored, as it results in no valid DOS memory allocation > at all. >=20 > Right now, the only older system I could test it against uses FreeBSD > 5.x, where the mmap() works as expected. So does anyone have an idea > why this mmap() call: >=20 > if (mmap((caddr_t)0x000000, 0x100000, > PROT_EXEC | PROT_READ | PROT_WRITE, > MAP_ANON | MAP_FIXED | MAP_SHARED, > -1, 0) =3D=3D MAP_FAILED) { > perror("Error mapping HMA, HMA disabled: "); > HMA_a20 =3D -1; > close(HMA_fd_off); > close(HMA_fd_on); > return; > } >=20 > yields an EINVAL now under 8-stable? Do sysctl security.bsd.map_at_zero=3D1 --+YUTx28Pm90FnKYj Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iEYEARECAAYFAk34uxMACgkQC3+MBN1Mb4i7ZwCgzIlY8O+tC8lnzzAZTzdlzDry yIIAni7u2Ec+QVcRLcYinmmASniovBgg =kXPb -----END PGP SIGNATURE----- --+YUTx28Pm90FnKYj--