linux-kernel - Re: [PATCH 31/34] vfs: syscall: Add fspick() to select a superblock for reconfiguration [ver #12]

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <13800.1539789863@warthog.procyon.org.uk>
Date:   Wed, 17 Oct 2018 16:24:23 +0100
From:   David Howells <dhowells@...hat.com>
To:     ebiederm@...ssion.com (Eric W. Biederman)
Cc:     dhowells@...hat.com,
        Alan Jenkins <alan.christopher.jenkins@...il.com>,
        Al Viro <viro@...IV.linux.org.uk>, linux-api@...r.kernel.org,
        torvalds@...ux-foundation.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, mszeredi@...hat.com
Subject: Re: [PATCH 31/34] vfs: syscall: Add fspick() to select a superblock for reconfiguration [ver #12]

Eric W. Biederman <ebiederm@...ssion.com> wrote:

> Davids check will work for bind mounts as well.  It just won't work it
> just won't work for files or subdirectories of some mountpoint.

Bind mounts have to be done with open_tree() and move_mount().  You can't now
do fsmount() on something fspick()'d.

David