[PATCH 1/5] fs: Verify access of user towards block device file when mounting

[Seth Forshee]

On Fri, Oct 02, 2015 at 01:07:00AM +0200, Jan Kara wrote:
> On Thu 01-10-15 10:55:50, Eric W. Biederman wrote:
> > The goal if possible is to run things like docker without needed to be
> > root or even more fun to run docker in a container, and in general
> > enable nested containers.
> 
> Frankly at the filesystem side we are rather far from being able to safely
> mount untrusted device and I don't think we'll ever be robust enough to
> tolerate e.g. user changing the disk while fs is using it. So would this be
> FUSE-only thing or is someone still hoping that general purpose filesystems
> will be robust enough in future?

FUSE will almost certainly be first. I've also been working with ext4,
and I would like to see that eventually supported to some degree.

Seth