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Date: Thu, 8 Sep 2011 15:56:58 +0200
From: yersinia <yersinia.spiros@...il.com>
To: owl-dev@...ts.openwall.com
Subject: Re: /tmp fs type
On Wed, Sep 7, 2011 at 11:36 AM, Solar Designer <solar@...nwall.com> wrote:
> Vasiliy,
>
> On Wed, Sep 07, 2011 at 01:15:56PM +0400, Vasiliy Kulikov wrote:
> > While we have an option to setup /tmp as tmpfs,
>
> This is more than just an option - this is the current default. And if
> an admin overrides this default, then presumably they know what they're
> doing.
>
> > we probably should
> > support bind mounts for /tmp (and /home?) to deny creating links to sxid
> > binaries:
>
> /tmp is already a separate filesystem. As to /home, maybe. But we're
> planning to (re-)harden the kernel anyway, so why bother with partial
> workarounds in userspace? Just in case someone runs Owl userland with a
> non-Owl kernel?
>
> And what do you mean by "supporting" bind mounts? Aren't they already
> supported (with a trivial edit to fstab)? Do you mean an installer
> feature? If so, I see no reason to provide it if it's just for those
> who would use a non-Owl kernel - that is, people who are willing to
> customize the system on their own.
>
> Openwall support pam_namespace already (
http://www.coker.com.au/selinux/talks/sage-2006/PolyInstantiatedDirectories.html)
? It is not only for selinux system. Just for curiosity.
Elia
> Alexander
>
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