On Mon, Sep 06, 2021 at 04:56:44PM +0200, Miklos Szeredi wrote: > On Mon, 6 Sept 2021 at 16:39, Dr. David Alan Gilbert > <dgilbert@xxxxxxxxxx> wrote: > > > IMHO the real problem here is that the user/trusted/system/security > > 'namespaces' are arbitrary hacks rather than a proper namespacing > > mechanism that allows you to create new (nested) namespaces and associate > > permissions with each one. > > Indeed. > > This is what Eric Biederman suggested at some point for supporting > trusted xattrs within a user namespace: > > | For trusted xattrs I think it makes sense in principle. The namespace > | would probably become something like "trusted<ns-root-uid>.". > > Theory sounds simple enough. Anyone interested in looking at the details? So this namespaced trusted.* xattr domain will basically avoid the need to have CAP_SYS_ADMIN in init_user_ns, IIUC. I guess this is better than giving CAP_SYS_ADMIN in init_user_ns. Vivek
