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Message-ID: <20110907093653.GA17783@openwall.com>
Date: Wed, 7 Sep 2011 13:36:53 +0400
From: Solar Designer <solar@...nwall.com>
To: owl-dev@...ts.openwall.com
Subject: Re: /tmp fs type
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.
Alexander
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