From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:53774 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1423111AbbEOB5g (ORCPT ); Thu, 14 May 2015 21:57:36 -0400 Subject: Patch "mnt: Fix fs_fully_visible to verify the root directory is visible" has been added to the 4.0-stable tree To: ebiederm@xmission.com, ewindisch@docker.com, gregkh@linuxfoundation.org Cc: , From: Date: Thu, 14 May 2015 18:57:36 -0700 Message-ID: <1431655056248237@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled mnt: Fix fs_fully_visible to verify the root directory is visible to the 4.0-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mnt-fix-fs_fully_visible-to-verify-the-root-directory-is-visible.patch and it can be found in the queue-4.0 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 7e96c1b0e0f495c5a7450dc4aa7c9a24ba4305bd Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Fri, 8 May 2015 16:36:50 -0500 Subject: mnt: Fix fs_fully_visible to verify the root directory is visible From: "Eric W. Biederman" commit 7e96c1b0e0f495c5a7450dc4aa7c9a24ba4305bd upstream. This fixes a dumb bug in fs_fully_visible that allows proc or sys to be mounted if there is a bind mount of part of /proc/ or /sys/ visible. Reported-by: Eric Windisch Signed-off-by: "Eric W. Biederman" Signed-off-by: Greg Kroah-Hartman --- fs/namespace.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/fs/namespace.c +++ b/fs/namespace.c @@ -3178,6 +3178,12 @@ bool fs_fully_visible(struct file_system if (mnt->mnt.mnt_sb->s_type != type) continue; + /* This mount is not fully visible if it's root directory + * is not the root directory of the filesystem. + */ + if (mnt->mnt.mnt_root != mnt->mnt.mnt_sb->s_root) + continue; + /* This mount is not fully visible if there are any child mounts * that cover anything except for empty directories. */ Patches currently in stable-queue which might be from ebiederm@xmission.com are queue-4.0/mnt-fix-fs_fully_visible-to-verify-the-root-directory-is-visible.patch