Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932096AbVJKOYO (ORCPT ); Tue, 11 Oct 2005 10:24:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932097AbVJKOYO (ORCPT ); Tue, 11 Oct 2005 10:24:14 -0400 Received: from 68.105.138.210.bn.2iij.net ([210.138.105.68]:8458 "HELO viper2.netfort.gr.jp") by vger.kernel.org with SMTP id S932096AbVJKOYO (ORCPT ); Tue, 11 Oct 2005 10:24:14 -0400 Date: Tue, 11 Oct 2005 23:24:30 +0900 Message-ID: <87achg9lnl.dancerj%dancer@netfort.gr.jp> From: Junichi Uekawa To: Scott James Remnant Cc: Junichi Uekawa , 322309@bugs.debian.org, 329468@bugs.debian.org, debian-devel@bugs.debian.org, linux-kernel@vger.kernel.org, 332903@bugs.debian.org Subject: Re: Bug#322309: Debian woody dpkg no longer works with recent linux kernel. In-Reply-To: <1128897196.19000.3.camel@localhost.localdomain> References: <87zmpi3ell.dancerj%dancer@netfort.gr.jp> <1128897196.19000.3.camel@localhost.localdomain> User-Agent: Wanderlust/2.14.0 (Africa) SEMI/1.14.6 (Maruoka) FLIM/1.14.7 (=?ISO-8859-4?Q?Sanj=F2?=) APEL/10.6 Emacs/21.4 (x86_64-pc-linux-gnu) MULE/5.0 (SAKAKI) MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1229 Lines: 45 Hi, > > dpkg in Debian woody (3.0) is broken by recent linux kernels; > > due to the following command changing behavior (mmap of > > zero-byte length): > > > > addr=mmap(NULL, 0, PROT_READ, MAP_SHARED, fd, 0); > > > > These bugs are caused by mmap changing behavior; > > it used to return NULL when given a length of 0. > > However, it now returns -1, and gives back an errno=EINVAL. > > > Indeed. This was the sole change in the 1.13.8 release. 1.13.8 is more recent than sarge; and I'm not quite sure why sarge successfully installs, and woody fails. I'm seeing several potential solutions. 0. Backport dpkg change to woody and update woody (maybe impossible due to Debian oldstable update infrastructure) 1. Modify [c]debootstrap to dump dummy data in /var/lib/dpkg/{status,available} 2. write a kernel patch to return 0 when mmap is called with length=0 3. Create a LD_PRELOAD or ptrace hack to return 0 when mmap is called with length=0 regards, junichi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/