Re: [ linus-git ] prctl(PR_SET_KEEPCAPS, ...) is broken for someconfigs, e.g. CONFIG_SECURITY_SELINUX

[Andrew Morton]

On Sun, 08 Jun 2008 15:34:44 -0700 Andrew Morgan <morgan@xxxxxxxxxx> wrote:

> | On Sun, 08 Jun 2008 08:10:26 -0700 Andrew Morgan <morgan@xxxxxxxxxx>
> wrote:
> |
> |> Nacked-by: Andrew G. Morgan <morgan@xxxxxxxxxx>
> |>
> |> In a configuration in which you are not using capabilities, what is the
> |> "keep capabilities" operation supposed to do? Lie to you?
> |>
> |> http://bugzilla.kernel.org/show_bug.cgi?id=10748
> |
> | I totally agree with comment 11 there. Quite a number of people have
> already
> | hit this and more surely will.  How can we help them (and hence us)?
>
> What do people think about comment #8 from Stephen Smalley?:
> 
> The dummy module is generally in the untenable position of having to lie
> to userspace or break the existing capability-related system call
> interface.  It should just go away, and make capability the default
> module (w/ stubs for the rest of the LSM hooks as with dummy).  Then
> CONFIG_SECURITY=n will yield the same result as CONFIG_SECURITY=y w/o
> any further options.

(removed pgp crap, undid top-posting.  Your emails are very hard to reply to)

It's a fine comment, but I am not knowledgeable enough in this area to
say whether it's a desirable thing to do for 2.6.26.

I fear that nothing will happen, and we'll end up wasting a lot of
peoples' time sending hey-why-did-my-dhcp-break reports.

--
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/