From: Pavel Machek <pavel@ucw.cz>
To: Tushar Sugandhi <tusharsu@linux.microsoft.com>
Cc: zohar@linux.ibm.com, stephen.smalley.work@gmail.com,
casey@schaufler-ca.com, agk@redhat.com, snitzer@redhat.com,
gmazyland@gmail.com, paul@paul-moore.com,
tyhicks@linux.microsoft.com, sashal@kernel.org,
jmorris@namei.org, nramas@linux.microsoft.com,
linux-integrity@vger.kernel.org, selinux@vger.kernel.org,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org, dm-devel@redhat.com
Subject: Re: [PATCH v6 0/8] IMA: support for measuring kernel integrity critical data
Date: Sun, 22 Nov 2020 22:00:31 +0100 [thread overview]
Message-ID: <20201122210031.GA26756@amd> (raw)
In-Reply-To: <aadf6e35-39bc-74d4-6ca3-d708860738a5@linux.microsoft.com>
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Hi!
> >How is it supposed to be useful?
> >
> >I'm pretty sure there are critical data that are not measured by
> >proposed module... and that are written under normal circumstances.
> >
> The goal of this series is to introduce the IMA hook
> measure_critical_data() and the necessary policies to use it; and
> illustrate that use with one example (SELinux). It is not scalable to
> identify and update all the critical data sources to use the proposed
> module at once.
>
> A piecemeal approach to add more critical data measurement in subsequent
> patches would be easy to implement and review.
Basically every other data structure in kernel is "critical" by your
definition, and you can't really measure them all; some of them change
rather often. Going piecemeal does not really help here.
Example of critical data structure: page table entries for process I
own.
Best regards,
Pavel
--
http://www.livejournal.com/~pavelmachek
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next prev parent reply other threads:[~2020-11-22 21:00 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-19 23:26 [PATCH v6 0/8] IMA: support for measuring kernel integrity critical data Tushar Sugandhi
2020-11-19 23:26 ` [PATCH v6 1/8] IMA: generalize keyring specific measurement constructs Tushar Sugandhi
2020-11-19 23:26 ` [PATCH v6 2/8] IMA: add support to measure buffer data hash Tushar Sugandhi
2020-11-19 23:26 ` [PATCH v6 3/8] IMA: define a hook to measure kernel integrity critical data Tushar Sugandhi
2020-11-19 23:26 ` [PATCH v6 4/8] IMA: add policy rule to measure " Tushar Sugandhi
2020-11-19 23:26 ` [PATCH v6 5/8] IMA: extend policy to add data sources as a critical data measurement constraint Tushar Sugandhi
2020-11-19 23:26 ` [PATCH v6 6/8] IMA: add support to critical data hook to limit data sources for measurement Tushar Sugandhi
2020-11-19 23:26 ` [PATCH v6 7/8] IMA: add a built-in policy rule for critical data measurement Tushar Sugandhi
2020-11-20 14:30 ` Mimi Zohar
2020-11-20 23:33 ` Lakshmi Ramasubramanian
2020-11-19 23:26 ` [PATCH v6 8/8] selinux: measure state and hash of the policy using IMA Tushar Sugandhi
2020-11-20 15:49 ` Mimi Zohar
2020-11-20 23:40 ` Lakshmi Ramasubramanian
2020-11-21 2:05 ` James Morris
2020-11-23 19:37 ` Tushar Sugandhi
2020-11-20 12:46 ` [PATCH v6 0/8] IMA: support for measuring kernel integrity critical data Pavel Machek
2020-11-22 20:53 ` Tushar Sugandhi
2020-11-22 21:00 ` Pavel Machek [this message]
2020-11-23 13:41 ` Mimi Zohar
2020-11-23 17:18 ` Pavel Machek
2020-11-23 19:49 ` Mimi Zohar
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