[PATCH v4 4/6] add statmount(2) syscall

[Paul Moore]

On Wed, Nov 8, 2023 at 2:58 AM Christian Brauner <brauner at kernel.org> wrote:
> > > +static int do_statmount(struct stmt_state *s)
> > > +{
> > > +   struct statmnt *sm = &s->sm;
> > > +   struct mount *m = real_mount(s->mnt);
> > > +   size_t copysize = min_t(size_t, s->bufsize, sizeof(*sm));
> > > +   int err;
> > > +
> > > +   err = security_sb_statfs(s->mnt->mnt_root);
> > > +   if (err)
> > > +           return err;
> > > +
> > > +   if (!capable(CAP_SYS_ADMIN) &&
> > > +       !is_path_reachable(m, m->mnt.mnt_root, &s->root))
> > > +           return -EPERM;
> >
> > In order to be consistent with our typical access control ordering,
> > please move the security_sb_statfs() call down to here, after the
> > capability checks.
>
> I've moved the security_sb_statfs() calls accordingly.

Okay, good.  Did I miss a comment or a patch where that happened?  I
looked over the patchset and comments yesterday and didn't recall
seeing anything about shuffling the access control checks.

-- 
paul-moore.com