From: Roberto Sassu <roberto.sassu@huawei.com>
To: Mimi Zohar <zohar@linux.ibm.com>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"mchehab+huawei@kernel.org" <mchehab+huawei@kernel.org>
Cc: "linux-integrity@vger.kernel.org"
<linux-integrity@vger.kernel.org>,
"linux-security-module@vger.kernel.org"
<linux-security-module@vger.kernel.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"linux-kselftest@vger.kernel.org"
<linux-kselftest@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Igor Stoppa <igor.stoppa@huawei.com>
Subject: RE: [RFC][PATCH v2 06/12] diglim: Interfaces - digest_list_add, digest_list_del
Date: Fri, 30 Jul 2021 14:24:51 +0000 [thread overview]
Message-ID: <bd0787e0ee4f47baa41abf47976e536c@huawei.com> (raw)
In-Reply-To: <2c731f07bd08f01f2a3e032814bc65ae9a8494ad.camel@linux.ibm.com>
> From: Mimi Zohar [mailto:zohar@linux.ibm.com]
> Sent: Friday, July 30, 2021 4:03 PM
> Hi Roberto,
>
> On Fri, 2021-07-30 at 13:16 +0000, Roberto Sassu wrote:
> > > From: Mimi Zohar [mailto:zohar@linux.ibm.com]
> > > Sent: Friday, July 30, 2021 2:40 PM
>
> > > "critical data", in this context, should probably be used for verifying
> > > the in memory file digests and other state information haven't been
> > > compromised.
> >
> > Actually, this is what we are doing currently. To keep the
> > implementation simple, once the file or the buffer are uploaded
> > to the kernel, they will not be modified, just accessed through
> > the indexes.
>
> My main concern about digest lists is their integrity, from loading the
> digest lists to their being stored in memory. A while back, there was
> some work on defining a write once memory allocator. I don't recall
> whatever happened to it. This would be a perfect usecase for that
> memory allocator.
Adding Igor in CC.
Regarding loading, everything uploaded to the kernel is carefully
evaluated. This should not be a concern. Regarding making them
read-only, probably if you can subvert digest lists you can also
remove the read-only protection (unless you use an hypervisor).
Thanks
Roberto
HUAWEI TECHNOLOGIES Duesseldorf GmbH, HRB 56063
Managing Director: Li Peng, Li Jian, Shi Yanli
> thanks,
>
> Mimi
next prev parent reply other threads:[~2021-07-30 14:25 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-26 16:36 [RFC][PATCH v2 00/12] integrity: Introduce DIGLIM Roberto Sassu
2021-07-26 16:36 ` [RFC][PATCH v2 01/12] diglim: Overview Roberto Sassu
2021-07-28 11:10 ` Mauro Carvalho Chehab
2021-07-28 11:40 ` Roberto Sassu
2021-07-26 16:36 ` [RFC][PATCH v2 02/12] diglim: Basic definitions Roberto Sassu
2021-07-27 14:43 ` Greg KH
2021-07-27 15:35 ` Roberto Sassu
2021-07-27 15:44 ` Greg KH
2021-07-27 16:09 ` Roberto Sassu
2021-07-27 16:13 ` Greg KH
2021-07-28 6:59 ` Roberto Sassu
2021-07-28 11:31 ` Mauro Carvalho Chehab
2021-07-28 11:45 ` Roberto Sassu
2021-07-28 13:08 ` Mauro Carvalho Chehab
2021-07-28 13:47 ` Roberto Sassu
2021-07-26 16:36 ` [RFC][PATCH v2 03/12] diglim: Objects Roberto Sassu
2021-07-28 11:38 ` Mauro Carvalho Chehab
2021-07-28 11:47 ` Roberto Sassu
2021-07-26 16:36 ` [RFC][PATCH v2 04/12] diglim: Methods Roberto Sassu
2021-07-28 12:18 ` Mauro Carvalho Chehab
2021-07-28 12:30 ` Roberto Sassu
2021-07-26 16:36 ` [RFC][PATCH v2 05/12] diglim: Parser Roberto Sassu
2021-07-28 12:35 ` Mauro Carvalho Chehab
2021-07-26 16:36 ` [RFC][PATCH v2 06/12] diglim: Interfaces - digest_list_add, digest_list_del Roberto Sassu
2021-07-28 12:38 ` Mauro Carvalho Chehab
2021-07-29 21:20 ` Mimi Zohar
2021-07-30 7:16 ` Roberto Sassu
2021-07-30 12:39 ` Mimi Zohar
2021-07-30 13:16 ` Roberto Sassu
2021-07-30 14:03 ` Mimi Zohar
2021-07-30 14:24 ` Roberto Sassu [this message]
2021-08-02 8:14 ` Roberto Sassu
2021-08-02 15:01 ` Mimi Zohar
2021-08-02 14:42 ` Mimi Zohar
2021-08-02 15:12 ` Roberto Sassu
2021-08-02 16:54 ` Roberto Sassu
2021-08-05 15:38 ` Mimi Zohar
2021-08-05 17:04 ` Roberto Sassu
2021-07-26 16:36 ` [RFC][PATCH v2 07/12] diglim: Interfaces - digest_lists_loaded Roberto Sassu
2021-07-26 16:36 ` [RFC][PATCH v2 08/12] diglim: Interfaces - digest_label Roberto Sassu
2021-07-26 16:36 ` [RFC][PATCH v2 09/12] diglim: Interfaces - digest_query Roberto Sassu
2021-07-26 16:36 ` [RFC][PATCH v2 10/12] diglim: Interfaces - digests_count Roberto Sassu
2021-07-28 12:45 ` Mauro Carvalho Chehab
2021-07-26 16:36 ` [RFC][PATCH v2 11/12] diglim: Remote Attestation Roberto Sassu
2021-07-28 12:47 ` Mauro Carvalho Chehab
2021-07-28 12:54 ` Roberto Sassu
2021-07-26 16:37 ` [RFC][PATCH v2 12/12] diglim: Tests Roberto Sassu
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=bd0787e0ee4f47baa41abf47976e536c@huawei.com \
--to=roberto.sassu@huawei.com \
--cc=gregkh@linuxfoundation.org \
--cc=igor.stoppa@huawei.com \
--cc=linux-doc@vger.kernel.org \
--cc=linux-integrity@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-security-module@vger.kernel.org \
--cc=mchehab+huawei@kernel.org \
--cc=zohar@linux.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).