From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753481Ab1KMLLQ (ORCPT ); Sun, 13 Nov 2011 06:11:16 -0500 Received: from smtprelay.restena.lu ([158.64.1.62]:38404 "EHLO smtprelay.restena.lu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751281Ab1KMLLO convert rfc822-to-8bit (ORCPT ); Sun, 13 Nov 2011 06:11:14 -0500 Date: Sun, 13 Nov 2011 12:11:05 +0100 From: Bruno =?UTF-8?B?UHLDqW1vbnQ=?= Cc: Al Viro , linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [resolved] Filesystem (directory) permissions meaning difference for x86_64 and x86 for 3.1? Message-ID: <20111113121105.1092d733@neptune.home> In-Reply-To: <20111109215125.7c1c3d3a@neptune.home> References: <20111109215125.7c1c3d3a@neptune.home> X-Mailer: Claws Mail 3.7.10 (GTK+ 2.24.5; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT To: unlisted-recipients:; (no To-header on input) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 09 November 2011 Bruno Prémont wrote: > On a x86_64 system I'm getting permission denied when trying to chdir() > into a directory where I have only 'x' permissions (be it with unix > permissions or with posix ACLs). > For the same layout of directory I can successfully chdir() on x86 as I > can with older kernels of 2.6 series. > > In both cases the filesystem is tmpfs with support for posix ACLs and > kernel is 3.1.0. > > > Directory layout: > drwx--x--- 3 root test 60 Nov 9 21:14 /tmp/btest > drwxrwx--- 2 root test 40 Nov 9 21:14 /tmp/btest/subtest > drwxr-x---+ 3 root root 60 Nov 9 21:10 /tmp/test > drwxrwx---+ 2 root root 40 Nov 9 21:10 /tmp/test/subtest > > Posix ACLs > # file: /tmp/test > # owner: root > # group: root > user::rwx > group::r-x > group:test:--x > mask::r-x > other::--- > > # file: test/subtest/ > # owner: root > # group: root > user::rwx > group::r-x > group:test:rwx > mask::rwx > other::--- > > > When executing as user test (with test as only group), on x86_64 I get > EPERM on chdir(X) where X is any one of the 4 directories above. > > On x86 I can chdir() into the directory without issue (as expected), > and when in /tmp/test (or /tmp/btest) I get EPERM when trying to list > contents - expected as well. Under subtest I can list content. > > The same results are obtained on XFS filesystem. > > Any idea what's wrong? The issue was two entries in /etc/group for the same group name but with two distinct GIDs :/ This explains why I could not reproduce on a different system! Bruno