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From: Janne Karhunen <janne.karhunen@gmail.com>
To: Mimi Zohar <zohar@linux.ibm.com>
Cc: linux-integrity@vger.kernel.org,
	linux-security-module <linux-security-module@vger.kernel.org>,
	Ken Goldman <kgold@linux.ibm.com>,
	david.safford@gmail.com, monty.wiseman@ge.com,
	"Serge E. Hallyn" <serge@hallyn.com>
Subject: Re: [PATCH v2] ima: export the measurement list when needed
Date: Mon, 27 Jan 2020 11:03:03 +0200
Message-ID: <CAE=Ncrawp7BPikkg0-ww2dO2_+tDPkaGxCpwMbDX4yqYWuYBWQ@mail.gmail.com> (raw)
In-Reply-To: <1580058069.5990.36.camel@linux.ibm.com>

On Sun, Jan 26, 2020 at 7:01 PM Mimi Zohar <zohar@linux.ibm.com> wrote:

> > > I don't think it is common, and probably not acceptable, for the
> > > kernel to open a file for writing.
> >
> > Ok. It just means that the kernel cannot do its own memory management
> > and will depend on the user flushing the memory often enough to
> > prevent something bad from happening. Is this more common in the
> > kernel than writing out a file?
>
> Ok, there are examples of both passing a file descriptor and passing a
> pathname from userspace, but even in the case of passing a pathname,
> userspace normally creates the file.

Sorry, I was slow to get your proposal. I'll try to see how that would
look like.


> There's been discussion in the past of defining an integrity
> capability.  Are we at that point where we really do need to define an
> integrity capability or is everyone comfortable with relying on
> CAP_SYS_ADMIN?

Every time something like this is being proposed there is a lot of
shouting from people that they want their root user (renamed as
CAP_SYS_ADMIN) back. I'd be happy with such bit and several others,
too.


> When implementing this feature of exporting and truncating the
> measurement list, please keep in mind how this would work in the
> context of IMA namespaces.

That could be rough. I'll try to think about it.


--
Janne

  reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-08 11:17 Janne Karhunen
2020-01-10  8:48 ` Janne Karhunen
2020-01-22 15:56   ` Mimi Zohar
2020-01-23  8:41     ` Janne Karhunen
2020-01-26 17:01       ` Mimi Zohar
2020-01-27  9:03         ` Janne Karhunen [this message]
2020-02-06 14:13   ` Mimi Zohar
2020-02-10  8:04     ` Janne Karhunen
2020-02-10 15:26       ` Mimi Zohar
2020-02-10 18:18     ` david.safford
2020-02-10 20:24       ` Mimi Zohar
2020-02-11  8:06         ` Janne Karhunen
2020-02-11 16:10         ` david.safford
2020-02-11 23:10           ` Mimi Zohar
2020-02-12 21:08             ` david.safford
2020-02-13  1:03               ` Mimi Zohar
2020-02-13  6:41                 ` Janne Karhunen
2020-02-18 15:36                   ` Mimi Zohar
2020-02-13 20:11           ` Ken Goldman
2020-02-18 14:50             ` david.safford
2020-01-24 14:46 ` david.safford
2020-01-27  8:48   ` Janne Karhunen

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