From owner-freebsd-stable@FreeBSD.ORG Sat Dec 11 17:08:36 2010 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 5C572106566C for ; Sat, 11 Dec 2010 17:08:36 +0000 (UTC) (envelope-from 000.fbsd@quip.cz) Received: from elsa.codelab.cz (elsa.codelab.cz [94.124.105.4]) by mx1.freebsd.org (Postfix) with ESMTP id 19F4D8FC12 for ; Sat, 11 Dec 2010 17:08:34 +0000 (UTC) Received: from elsa.codelab.cz (localhost.codelab.cz [127.0.0.1]) by elsa.codelab.cz (Postfix) with ESMTP id 24B3119E02E; Sat, 11 Dec 2010 17:51:44 +0100 (CET) Received: from [192.168.1.2] (ip-86-49-61-235.net.upcbroadband.cz [86.49.61.235]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by elsa.codelab.cz (Postfix) with ESMTPSA id D14E219E02D; Sat, 11 Dec 2010 17:51:41 +0100 (CET) Message-ID: <4D03AC1D.5070906@quip.cz> Date: Sat, 11 Dec 2010 17:51:41 +0100 From: Miroslav Lachman <000.fbsd@quip.cz> User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.1.16) Gecko/20101123 SeaMonkey/2.0.11 MIME-Version: 1.0 To: Garrett Cooper References: <4BCE4D0F.2020807@quip.cz> <4BCE6615.9010707@quip.cz> In-Reply-To: <4BCE6615.9010707@quip.cz> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-stable@freebsd.org Subject: Re: /libexec/ld-elf.so.1: Cannot execute objects on / 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: Sat, 11 Dec 2010 17:08:36 -0000 Miroslav Lachman wrote: > Garrett Cooper wrote: >> 2010/4/20 Miroslav Lachman<000.fbsd@quip.cz>: >>> I have large storage partition (/vol0) mounted as noexec and nosuid. >>> Then >>> one directory from this partition is mounted by nullfs as "exec and >>> suid" so >>> anything on it can be executed. >>> >>> The directory contains full installation of jail. Jail is running >>> fine, but >>> some ports (PHP for example) cannot be compiled inside the jail with >>> message: >>> >>> /libexec/ld-elf.so.1: Cannot execute objects on / >>> >>> The same apply to executing of apxs >>> >>> root@rainnew ~/# /usr/local/sbin/apxs -q MPM_NAME >>> /libexec/ld-elf.so.1: Cannot execute objects on / >>> >>> apxs:Error: Sorry, no shared object support for Apache. >>> apxs:Error: available under your platform. Make sure. >>> apxs:Error: the Apache module mod_so is compiled into. >>> apxs:Error: your server binary '/usr/local/sbin/httpd'.. >>> >>> (it should return "prefork") >>> >>> So I think there is some bug in checking the mountpoint options, >>> where the >>> check is made on "parent" of the nullfs instead of the nullfs target >>> mountpoint. >>> >>> It is on 6.4-RELEASE i386 GENERIC. I did not test it on another release. >>> >>> This is list of related mount points: >>> >>> /dev/mirror/gm0s2d on /vol0 (ufs, local, noexec, nosuid, soft-updates) >>> /vol0/jail/.nullfs/rain on /vol0/jail/rain_new (nullfs, local) >>> /usr/ports on /vol0/jail/rain_new/usr/ports (nullfs, local) >>> devfs on /vol0/jail/rain_new/dev (devfs, local) >>> >>> If I changed /vol0 options to (ufs, local, soft-updates) the above >>> error is >>> gone and apxs / compilation works fine. >>> >>> Can somebody look at this problem? >> >> Can you please provide output from ktrace / truss for the issue? > > I did > # ktrace /usr/local/sbin/apxs -q MPM_NAME > > The output is here http://freebsd.quip.cz/ld-elf/ktrace.out > > Let me know if you need something else. > > Thank you for your interest! The problem is still there in FreeBSD 8.1-RELEASE amd64 GENERIC (and in 7.x). Can somebody say if this is a bug or an expected "feature"? Miroslav Lachman