Re: [RFC PATCH 3/4] kmod - add call_usermodehelper_ns() helper

[Oleg Nesterov]

On 11/25, Oleg Nesterov wrote:
>
> Let me first apologize, I didn't actually read this series yet.
>
> But I have to admit that so far I do not like this approach...
> probably I am biased.

Yes.

And I have another concern... this is mostly a feeling, I can be
easily wrong but:

> On 11/25, Ian Kent wrote:
> >
> > +static int umh_set_ns(struct subprocess_info *info, struct cred *new)
> > +{
> > +	struct nsproxy *ns = info->data;
> > +
> > +	mntns_setfs(ns->mnt_ns);
>
> Firstly, it is not clear to me if we should use the caller's ->mnt_ns.
> Let me remind about the coredump. The dumping task can cloned with
> CLONE_NEWNS or it cam do unshare(NEWNS)... but OK, I do not understand
> this enough.

And otoh. If we actually want to use the caller's mnt_ns/namespaces we
could simply fork/reparent a child which will do execve ?

Oleg.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/