From: Stefan Berger <stefanb@linux.ibm.com>
To: Roberto Sassu <roberto.sassu@huaweicloud.com>,
corbet@lwn.net, skhan@linuxfoundation.org, zohar@linux.ibm.com,
dmitry.kasatkin@gmail.com, eric.snowberg@oracle.com,
paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com
Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-integrity@vger.kernel.org,
linux-security-module@vger.kernel.org,
gregorylumen@linux.microsoft.com, chenste@linux.microsoft.com,
nramas@linux.microsoft.com,
Roberto Sassu <roberto.sassu@huawei.com>
Subject: Re: [PATCH v5 00/13] ima: Introduce staging mechanism
Date: Wed, 27 May 2026 09:57:02 -0400 [thread overview]
Message-ID: <23a3b9bb-af97-4285-a03d-7b6e7ccb274e@linux.ibm.com> (raw)
In-Reply-To: <20260429160319.4162918-1-roberto.sassu@huaweicloud.com>
On 4/29/26 12:03 PM, Roberto Sassu wrote:
> From: Roberto Sassu <roberto.sassu@huawei.com>
>
> Usage
> =====
>
> The IMA staging mechanism can be enabled from the kernel configuration
> with the CONFIG_IMA_STAGING option.
>
> If it is enabled, IMA duplicates the current measurements interfaces
> (both binary and ASCII), by adding the _staged file suffix. Both the
> original and the staging interfaces gain the write permission for the
> root user and group, but require the process to have CAP_SYS_ADMIN set.
>
> The staging mechanism supports two flavors.
>
> Staging with prompt
> ~~~~~~~~~~~~~~~~~~~
>
> The current measurements list is moved to a temporary staging area, and
> staged measurements are deleted upon confirmation.
>
> This staging process is achieved with the following steps.
>
> 1. echo A > <original interface>: the user requests IMA to stage the
> entire measurements list;
> 2. cat <_staged interface>: the user reads the staged measurements;
> 3. echo D > <_staged interface>: the user requests IMA to delete
> staged measurements.
>
I have a IMA log sharder (based on FUSE; does more 'copying' than
'sharding') that successfully uses this method.
Tested-by: Stefan Berger <stefanb@linux.ibm.com>
prev parent reply other threads:[~2026-05-27 13:57 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-29 16:03 [PATCH v5 00/13] ima: Introduce staging mechanism Roberto Sassu
2026-04-29 16:03 ` [PATCH v5 01/13] ima: Remove ima_h_table structure Roberto Sassu
2026-05-21 2:05 ` Mimi Zohar
2026-04-29 16:03 ` [PATCH v5 02/13] ima: Replace static htable queue with dynamically allocated array Roberto Sassu
2026-05-21 2:05 ` Mimi Zohar
2026-04-29 16:03 ` [PATCH v5 03/13] ima: Introduce per binary measurements list type ima_num_entries counter Roberto Sassu
2026-05-21 2:05 ` Mimi Zohar
2026-04-29 16:03 ` [PATCH v5 04/13] ima: Introduce per binary measurements list type binary_runtime_size value Roberto Sassu
2026-05-21 2:06 ` Mimi Zohar
2026-05-21 7:58 ` Roberto Sassu
2026-04-29 16:03 ` [PATCH v5 05/13] ima: Introduce _ima_measurements_start() and _ima_measurements_next() Roberto Sassu
2026-05-21 2:06 ` Mimi Zohar
2026-04-29 16:03 ` [PATCH v5 06/13] ima: Mediate open/release method of the measurements list Roberto Sassu
2026-05-21 2:07 ` Mimi Zohar
2026-05-21 8:30 ` Roberto Sassu
2026-04-29 16:03 ` [PATCH v5 07/13] ima: Use snprintf() in create_securityfs_measurement_lists Roberto Sassu
2026-05-21 2:07 ` Mimi Zohar
2026-04-29 16:03 ` [PATCH v5 08/13] ima: Introduce ima_dump_measurement() Roberto Sassu
2026-05-21 2:07 ` Mimi Zohar
2026-04-29 16:03 ` [PATCH v5 09/13] ima: Add support for staging measurements with prompt Roberto Sassu
2026-05-04 12:51 ` Roberto Sassu
2026-05-21 15:18 ` Mimi Zohar
2026-04-29 16:03 ` [PATCH v5 10/13] ima: Add support for flushing the hash table when staging measurements Roberto Sassu
2026-05-21 16:06 ` Mimi Zohar
2026-04-29 16:03 ` [PATCH v5 11/13] ima: Support staging and deleting N measurements entries Roberto Sassu
2026-05-05 18:43 ` steven chen
2026-05-26 11:08 ` Mimi Zohar
2026-06-01 23:28 ` steven chen
2026-04-29 16:03 ` [PATCH v5 12/13] ima: Return error on deleting measurements already copied during kexec Roberto Sassu
2026-05-26 14:02 ` Mimi Zohar
2026-05-29 14:59 ` Roberto Sassu
2026-06-01 13:47 ` Mimi Zohar
2026-04-29 16:03 ` [PATCH v5 13/13] doc: security: Add documentation of the IMA staging mechanism Roberto Sassu
2026-05-26 15:53 ` Mimi Zohar
2026-05-07 16:47 ` [PATCH v5 00/13] ima: Introduce " steven chen
2026-05-11 17:29 ` Lakshmi Ramasubramanian
2026-05-12 8:17 ` Roberto Sassu
2026-05-15 17:37 ` Lakshmi Ramasubramanian
2026-05-19 8:38 ` Roberto Sassu
2026-05-26 14:10 ` Mimi Zohar
2026-05-21 2:02 ` Mimi Zohar
2026-05-27 13:57 ` Stefan Berger [this message]
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