linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Stefan Berger <stefanb@linux.ibm.com>
To: Mimi Zohar <zohar@linux.ibm.com>,
	Christian Brauner <christian.brauner@ubuntu.com>,
	James Bottomley <jejb@linux.ibm.com>
Cc: linux-integrity@vger.kernel.org, serge@hallyn.com,
	containers@lists.linux.dev, dmitry.kasatkin@gmail.com,
	ebiederm@xmission.com, krzysztof.struczynski@huawei.com,
	roberto.sassu@huawei.com, mpeters@redhat.com, lhinds@redhat.com,
	lsturman@redhat.com, puiterwi@redhat.com, jamjoom@us.ibm.com,
	linux-kernel@vger.kernel.org, paul@paul-moore.com,
	rgb@redhat.com, linux-security-module@vger.kernel.org,
	jmorris@namei.org
Subject: Re: [PATCH v5 15/16] ima: Move dentries into ima_namespace
Date: Fri, 10 Dec 2021 07:40:00 -0500	[thread overview]
Message-ID: <6de8d349-74f8-7be4-3854-5c4ac72860ad@linux.ibm.com> (raw)
In-Reply-To: <2587716d7d021c35e3b6ef22b6e30f44c2b3f98e.camel@linux.ibm.com>


On 12/10/21 07:09, Mimi Zohar wrote:
> On Fri, 2021-12-10 at 12:49 +0100, Christian Brauner wrote:
>>> There's still the problem that if you write the policy, making the file
>>> disappear then unmount and remount securityfs it will come back.  My
>>> guess for fixing this is that we only stash the policy file reference,
>>> create it if NULL but then set the pointer to PTR_ERR(-EINVAL) or
>>> something and refuse to create it for that value.
>> Some sort of indicator that gets stashed in struct ima_ns that the file
>> does not get recreated on consecutive mounts. That shouldn't be hard to
>> fix.
> The policy file disappearing is for backwards compatibility, prior to
> being able to extend the custom policy.  For embedded usecases,
> allowing the policy to be written exactly once might makes sense.  Do
> we really want/need to continue to support removing the policy in
> namespaces?

I don't have an answer but should the behavior for the same #define in 
this case be different for host and namespaces? Or should we just 
'select IMA_WRITE_POLICY and IMA_READ_POLICY' when IMA_NS is selected?


>
> thanks,
>
> Mimi
>

  reply	other threads:[~2021-12-10 12:40 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-08 22:18 [PATCH v5 00/16] ima: Namespace IMA with audit support in IMA-ns Stefan Berger
2021-12-08 22:18 ` [PATCH v5 01/16] ima: Add IMA namespace support Stefan Berger
2021-12-08 22:18 ` [PATCH v5 02/16] ima: Define ns_status for storing namespaced iint data Stefan Berger
2021-12-08 22:18 ` [PATCH v5 03/16] ima: Namespace audit status flags Stefan Berger
2021-12-08 22:18 ` [PATCH v5 04/16] ima: Move delayed work queue and variables into ima_namespace Stefan Berger
2021-12-09 13:11   ` Christian Brauner
2021-12-09 15:09     ` Stefan Berger
2021-12-08 22:18 ` [PATCH v5 05/16] ima: Move IMA's keys queue related " Stefan Berger
2021-12-08 22:18 ` [PATCH v5 06/16] ima: Move policy " Stefan Berger
2021-12-08 22:18 ` [PATCH v5 07/16] ima: Move ima_htable " Stefan Berger
2021-12-08 22:18 ` [PATCH v5 08/16] ima: Move measurement list related variables " Stefan Berger
2021-12-08 22:18 ` [PATCH v5 09/16] ima: Only accept AUDIT rules for IMA non-init_ima_ns namespaces for now Stefan Berger
2021-12-08 22:18 ` [PATCH v5 10/16] ima: Implement hierarchical processing of file accesses Stefan Berger
2021-12-08 22:18 ` [PATCH v5 11/16] securityfs: Only use simple_pin_fs/simple_release_fs for init_user_ns Stefan Berger
2021-12-08 22:18 ` [PATCH v5 12/16] securityfs: Extend securityfs with namespacing support Stefan Berger
2021-12-08 22:18 ` [PATCH v5 13/16] ima: Move some IMA policy and filesystem related variables into ima_namespace Stefan Berger
2021-12-09 19:11   ` Christian Brauner
2021-12-09 20:42     ` Stefan Berger
2021-12-10  0:57     ` Stefan Berger
2021-12-10 11:32       ` Christian Brauner
2021-12-10 13:57         ` Stefan Berger
2021-12-10 14:21           ` James Bottomley
2021-12-11  9:50           ` Christian Brauner
2021-12-11 10:45             ` Christian Brauner
2021-12-13 15:33             ` Stefan Berger
2021-12-13 15:50               ` Christian Brauner
2021-12-13 16:03                 ` Christian Brauner
2021-12-13 16:25                 ` Stefan Berger
2021-12-13 16:37                   ` Christian Brauner
2021-12-13 16:40                 ` Christian Brauner
2021-12-10 20:08         ` Stefan Berger
2021-12-11  8:46           ` Christian Brauner
2021-12-08 22:18 ` [PATCH v5 14/16] ima: Use mac_admin_ns_capable() to check corresponding capability Stefan Berger
2021-12-09  7:22   ` Denis Semakin
2021-12-09 13:23     ` James Bottomley
2021-12-09  8:09   ` Denis Semakin
2021-12-11 15:02     ` Serge E. Hallyn
2021-12-11 15:38       ` Stefan Berger
2021-12-11 16:00         ` James Bottomley
2021-12-08 22:18 ` [PATCH v5 15/16] ima: Move dentries into ima_namespace Stefan Berger
2021-12-09 14:34   ` Christian Brauner
2021-12-09 14:37     ` Christian Brauner
2021-12-09 14:41       ` Christian Brauner
2021-12-09 15:00         ` Stefan Berger
2021-12-09 15:47           ` Christian Brauner
2021-12-09 15:30       ` James Bottomley
2021-12-09 19:38         ` James Bottomley
2021-12-09 20:13           ` Stefan Berger
2021-12-10 11:49           ` Christian Brauner
2021-12-10 12:09             ` Mimi Zohar
2021-12-10 12:40               ` Stefan Berger [this message]
2021-12-10 13:02                 ` Mimi Zohar
2021-12-10 14:17                   ` Stefan Berger
2021-12-10 14:26                     ` James Bottomley
2021-12-10 15:26                       ` Mimi Zohar
2021-12-10 15:32                         ` Stefan Berger
2021-12-10 15:48                           ` Mimi Zohar
2021-12-10 16:40                             ` Stefan Berger
2021-12-10 12:40               ` James Bottomley
2021-12-10 12:54                 ` Mimi Zohar
2021-12-12 14:13             ` James Bottomley
2021-12-13 11:25               ` Christian Brauner
2021-12-08 22:18 ` [PATCH v5 16/16] ima: Setup securityfs for IMA namespace Stefan Berger

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=6de8d349-74f8-7be4-3854-5c4ac72860ad@linux.ibm.com \
    --to=stefanb@linux.ibm.com \
    --cc=christian.brauner@ubuntu.com \
    --cc=containers@lists.linux.dev \
    --cc=dmitry.kasatkin@gmail.com \
    --cc=ebiederm@xmission.com \
    --cc=jamjoom@us.ibm.com \
    --cc=jejb@linux.ibm.com \
    --cc=jmorris@namei.org \
    --cc=krzysztof.struczynski@huawei.com \
    --cc=lhinds@redhat.com \
    --cc=linux-integrity@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-security-module@vger.kernel.org \
    --cc=lsturman@redhat.com \
    --cc=mpeters@redhat.com \
    --cc=paul@paul-moore.com \
    --cc=puiterwi@redhat.com \
    --cc=rgb@redhat.com \
    --cc=roberto.sassu@huawei.com \
    --cc=serge@hallyn.com \
    --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).