From: "H. Peter Anvin" <hpa@zytor.com>
To: Jan Engelhardt <jengelh@linux01.gwdg.de>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Miklos Szeredi <miklos@szeredi.hu>,
linux-fsdevel@vger.kernel.org, util-linux-ng@vger.kernel.org,
containers@lists.osdl.org, linux-kernel@vger.kernel.org
Subject: Re: [patch 0/8] unprivileged mount syscall
Date: Fri, 06 Apr 2007 17:22:49 -0700 [thread overview]
Message-ID: <4616E459.1090409@zytor.com> (raw)
In-Reply-To: <Pine.LNX.4.61.0704070153180.22181@yvahk01.tjqt.qr>
Jan Engelhardt wrote:
> On Apr 6 2007 16:16, H. Peter Anvin wrote:
>>>> - users can use bind mounts without having to pre-configure them in
>>>> /etc/fstab
>>>>
>> This is by far the biggest concern I see. I think the security implication of
>> allowing anyone to do bind mounts are poorly understood.
>
> $ whoami
> miklos
> $ mount --bind / ~/down_under
>
> later that day:
> # userdel -r miklos
>
> So both the source (/) and target (~/down_under) directory must be owned
> by the user before --bind may succeed.
>
> There may be other implications hpa might want to fill us in.
Consider backups, for example.
-hpa
next prev parent reply other threads:[~2007-04-07 0:23 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-04 18:30 [patch 0/8] unprivileged mount syscall Miklos Szeredi
2007-04-04 18:30 ` [patch 1/8] add user mounts to the kernel Miklos Szeredi
2007-04-04 18:30 ` [patch 2/8] allow unprivileged umount Miklos Szeredi
2007-04-04 18:30 ` [patch 3/8] account user mounts Miklos Szeredi
2007-04-04 18:30 ` [patch 4/8] propagate error values from clone_mnt Miklos Szeredi
2007-04-04 18:30 ` [patch 5/8] allow unprivileged bind mounts Miklos Szeredi
2007-04-04 18:30 ` [patch 6/8] put declaration of put_filesystem() in fs.h Miklos Szeredi
2007-04-04 18:30 ` [patch 7/8] allow unprivileged mounts Miklos Szeredi
2007-04-04 18:30 ` [patch 8/8] allow unprivileged fuse mounts Miklos Szeredi
2007-04-06 23:02 ` [patch 0/8] unprivileged mount syscall Andrew Morton
2007-04-06 23:02 ` Andrew Morton
2007-04-06 23:16 ` H. Peter Anvin
2007-04-06 23:55 ` Jan Engelhardt
2007-04-07 0:22 ` H. Peter Anvin [this message]
2007-04-07 3:40 ` Eric Van Hensbergen
2007-04-07 6:48 ` Miklos Szeredi
2007-04-07 6:48 ` Miklos Szeredi
2007-04-10 8:52 ` Ian Kent
2007-04-11 10:48 ` Miklos Szeredi
2007-04-11 10:48 ` Miklos Szeredi
2007-04-11 13:48 ` Ian Kent
2007-04-11 14:26 ` Serge E. Hallyn
2007-04-11 14:26 ` Serge E. Hallyn
2007-04-11 14:27 ` Ian Kent
2007-04-11 14:27 ` Ian Kent
2007-04-11 14:45 ` Serge E. Hallyn
2007-04-11 14:45 ` Serge E. Hallyn
2007-04-07 6:41 ` Miklos Szeredi
2007-04-09 14:38 ` Serge E. Hallyn
2007-04-09 14:38 ` Serge E. Hallyn
2007-04-09 16:24 ` Miklos Szeredi
2007-04-09 16:24 ` Miklos Szeredi
2007-04-09 17:07 ` Serge E. Hallyn
2007-04-09 17:46 ` Ram Pai
2007-04-09 18:25 ` H. Peter Anvin
2007-04-10 10:33 ` Karel Zak
2007-04-09 20:10 ` Miklos Szeredi
2007-04-10 8:38 ` Ram Pai
2007-04-11 10:44 ` Miklos Szeredi
2007-04-11 18:28 ` Ram Pai
2007-04-11 18:28 ` Ram Pai
2007-04-13 11:58 ` Miklos Szeredi
2007-04-13 11:58 ` Miklos Szeredi
2007-04-13 13:28 ` Serge E. Hallyn
2007-04-13 13:28 ` Serge E. Hallyn
2007-04-13 14:05 ` Miklos Szeredi
2007-04-13 21:44 ` Serge E. Hallyn
2007-04-15 20:39 ` Miklos Szeredi
2007-04-15 20:39 ` Miklos Szeredi
2007-04-16 1:11 ` Serge E. Hallyn
2007-04-16 1:11 ` Serge E. Hallyn
2007-04-16 8:18 ` Ram Pai
2007-04-16 8:18 ` Ram Pai
2007-04-16 9:27 ` Miklos Szeredi
2007-04-16 9:27 ` Miklos Szeredi
2007-04-16 15:40 ` Eric W. Biederman
2007-04-16 15:55 ` Miklos Szeredi
2007-04-16 15:55 ` Miklos Szeredi
2007-04-13 20:07 ` Karel Zak
2007-04-15 20:21 ` Miklos Szeredi
2007-04-15 20:21 ` Miklos Szeredi
2007-04-16 7:59 ` Ram Pai
2007-04-16 7:59 ` Ram Pai
2007-04-09 18:57 ` Serge E. Hallyn
2007-04-09 20:14 ` Miklos Szeredi
2007-04-09 20:55 ` Serge E. Hallyn
[not found] ` <20070409205506.GC20226-6s5zFf/epYLPQpwDFJZrxKsjOiXwFzmk@public.gmane.org>
2007-04-11 19:43 ` Miklos Szeredi
[not found] ` <E1Hbiih-00060L-00-VFwzv6uONVrxNFs70CDYszOMxtEWgIxa@public.gmane.org>
2007-04-11 20:05 ` Serge E. Hallyn
2007-04-11 20:41 ` Miklos Szeredi
2007-04-11 20:57 ` Serge E. Hallyn
[not found] ` <20070404183012.429274832-sUDqSbJrdHQHWmgEVkV9KA@public.gmane.org>
2007-04-09 22:00 ` Serge E. Hallyn
2007-04-11 10:32 ` Miklos Szeredi
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