From: Mimi Zohar <zohar@linux.vnet.ibm.com>
To: Matthew Garrett <mjg59@google.com>,
Roberto Sassu <roberto.sassu@huawei.com>
Cc: linux-integrity <linux-integrity@vger.kernel.org>,
linux-security-module@vger.kernel.org,
linux-fsdevel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, silviu.vlasceanu@huawei.com
Subject: Re: [PATCH v2 00/15] ima: digest list feature
Date: Thu, 09 Nov 2017 11:17:16 -0500 [thread overview]
Message-ID: <1510244236.4484.172.camel@linux.vnet.ibm.com> (raw)
In-Reply-To: <CACdnJusj5aHHEJ2zY6UonK-XG_=P4Z09EPMZVKoXYUMZoUdHQQ@mail.gmail.com>
On Thu, 2017-11-09 at 09:47 -0500, Matthew Garrett wrote:
> This seems very over-complicated, and it's unclear why the kernel
> needs to open the file itself. You *know* that all of userland is
> trustworthy at this point even in the absence of signatures.
Assuming the initramfs is signed, then yes the rootfs files would be
trusted. rootfs can still access files from real root, which is where
policies are normally stored.
> It seems
> reasonable to provide a interface that allows userland to pass a
> digest list to the kernel, in the same way that userland can pass an
> IMA policy to the kernel. You can then restrict access to that
> interface via an LSM.
IMA can and should be configured to require signed policies.
Mimi
next prev parent reply other threads:[~2017-11-09 16:18 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-07 10:36 [PATCH v2 00/15] ima: digest list feature Roberto Sassu
2017-11-07 10:36 ` [PATCH v2 01/15] ima: generalize ima_read_policy() Roberto Sassu
2017-11-07 10:36 ` [PATCH v2 02/15] ima: generalize ima_write_policy() Roberto Sassu
2017-11-07 10:36 ` [PATCH v2 03/15] ima: generalize policy file operations Roberto Sassu
2017-11-07 10:36 ` [PATCH v2 04/15] ima: use ima_show_htable_value to show hash table data Roberto Sassu
2017-11-07 10:37 ` [PATCH v2 05/15] ima: add functions to manage digest lists Roberto Sassu
2017-11-07 10:37 ` [PATCH v2 06/15] ima: add parser of digest lists metadata Roberto Sassu
2017-11-18 4:20 ` Serge E. Hallyn
2017-11-18 23:23 ` Mimi Zohar
2017-11-20 9:40 ` Roberto Sassu
2017-11-20 13:53 ` Mimi Zohar
2017-11-20 16:52 ` Serge E. Hallyn
2017-11-07 10:37 ` [PATCH v2 07/15] ima: add parser of compact digest list Roberto Sassu
2017-11-07 10:37 ` [PATCH v2 08/15] ima: add parser of RPM package headers Roberto Sassu
2017-11-07 10:37 ` [PATCH v2 09/15] ima: introduce securityfs interfaces for digest lists Roberto Sassu
2017-11-07 10:37 ` [PATCH v2 10/15] ima: disable digest lookup if digest lists are not checked Roberto Sassu
2017-11-07 10:37 ` [PATCH v2 11/15] ima: add policy action digest_list Roberto Sassu
2017-11-07 10:37 ` [PATCH v2 12/15] ima: do not update security.ima if appraisal status is not INTEGRITY_PASS Roberto Sassu
2017-11-18 4:25 ` Serge E. Hallyn
2017-11-07 10:37 ` [PATCH v2 13/15] evm: add kernel command line option to select protected xattrs Roberto Sassu
2017-11-07 10:37 ` [PATCH v2 14/15] ima: add support for appraisal with digest lists Roberto Sassu
2017-11-07 10:37 ` [PATCH v2 15/15] ima: add Documentation/security/IMA-digest-lists.txt Roberto Sassu
2017-11-07 13:37 ` [PATCH v2 00/15] ima: digest list feature Mimi Zohar
2017-11-07 16:45 ` Roberto Sassu
2017-11-17 1:08 ` Kees Cook
2017-11-17 8:55 ` Roberto Sassu
2017-11-17 12:21 ` Mimi Zohar
2017-11-07 14:49 ` Matthew Garrett
2017-11-07 17:53 ` Roberto Sassu
2017-11-07 18:06 ` Matthew Garrett
2017-11-08 12:00 ` Roberto Sassu
2017-11-08 15:48 ` Matthew Garrett
2017-11-09 9:51 ` Roberto Sassu
2017-11-09 14:47 ` Matthew Garrett
2017-11-09 16:13 ` Roberto Sassu
2017-11-09 16:46 ` Matthew Garrett
2017-11-09 17:23 ` Roberto Sassu
2017-11-09 16:17 ` Mimi Zohar [this message]
2017-11-07 18:03 ` Safford, David (GE Global Research, US)
2017-11-08 10:16 ` Roberto Sassu
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