On Fri, Mar 06, 2020 at 05:25:49PM +0100, Miklos Szeredi wrote: > On Tue, Mar 03, 2020 at 08:46:09AM +0100, Miklos Szeredi wrote: > > > > I'm doing a patch. Let's see how it fares in the face of all these > > preconceptions. > > Here's a first cut. Doesn't yet have superblock info, just mount info. > Probably has rough edges, but appears to work. For starters, you have just made namespace_sem held over copy_to_user(). This is not going to fly.