From: bugzilla-daemon@bugzilla.kernel.org Subject: [Bug 60676] New: Stat system call gives permission denied to root for links under a sticky bit Date: Thu, 01 Aug 2013 15:02:36 +0000 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit To: linux-ext4@vger.kernel.org Return-path: Received: from mail.kernel.org ([198.145.19.201]:46422 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755737Ab3HAPCo (ORCPT ); Thu, 1 Aug 2013 11:02:44 -0400 Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D6AC62035A for ; Thu, 1 Aug 2013 15:02:42 +0000 (UTC) Received: from bugzilla2.web.kernel.org (bugzilla2.web.kernel.org [172.20.200.52]) by mail.kernel.org (Postfix) with ESMTP id 032752035D for ; Thu, 1 Aug 2013 15:02:37 +0000 (UTC) Sender: linux-ext4-owner@vger.kernel.org List-ID: https://bugzilla.kernel.org/show_bug.cgi?id=60676 Bug ID: 60676 Summary: Stat system call gives permission denied to root for links under a sticky bit Product: File System Version: 2.5 Kernel Version: 3.5.0 Hardware: x86-64 OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext4 Assignee: fs_ext4@kernel-bugs.osdl.org Reporter: jck@videk.com Regression: No If a directory has a sticky bit set, root cannot use anything that makes the stat system call on any of the links there. Example: > $ ls -ld /tmp/ > drwxrwxrwt 17 root root 4825088 Aug 1 10:50 /tmp/ > $ mkdir /tmp/testdir > $ touch /tmp/testdir/testfile > $ ln -s /tmp/testdir/ /tmp/testlink > $ ls /tmp/testlink/ > testfile > $ su > # ls /tmp/testlink ls: cannot access /tmp/testlink: Permission denied > # ls /tmp/testdir > testfile I can see how having root blindly follow links in a sticky directory could be a bad idea, but this goes against the behavior described by the man pages. -- You are receiving this mail because: You are watching the assignee of the bug.