linux-kernel - Re: [PATCH v1] ipe: add 'anonymous_memory' property for policy decisions

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Message-ID: <8ee41bc4-ca8e-416f-8219-12d4a83e5f8b@kernel.org>
Date: Thu, 24 Oct 2024 15:13:27 -0700
From: Fan Wu <wufan@...nel.org>
To: corbet@....net, jmorris@...ei.org, paul@...l-moore.com, serge@...lyn.com
Cc: linux-doc@...r.kernel.org, linux-security-module@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] ipe: add 'anonymous_memory' property for policy
 decisions

Since this patch is quite straightforward, I have merged it into the ipe#next branch for testing and will send it to Linus during the next merge window.


-Fan

On 2024/10/10 10:42, Fan Wu wrote:
> Currently, all existing IPE properties evaluate to FALSE for
> operations triggered by anonymous memory regions. As a result,
> IPE falls back to the policy's default action for such operations.
>
> In policies where the default action is DENY, this behavior blocks
> all anonymous memory operations, rendering binaries that rely on
> anonymous memory unusable.
>
> This commit introduces a new IPE property, 'anonymous_memory',
> which evaluates to TRUE when an operation is triggered by an
> anonymous memory region. This allows administrators to explicitly
> allow or deny operations involving anonymous memory.
>
> Signed-off-by: Fan Wu <wufan@...ux.microsoft.com>
> ---
>  Documentation/admin-guide/LSM/ipe.rst | 11 +++++++++++
>  Documentation/security/ipe.rst        |  9 +++++----
>  security/ipe/Kconfig                  | 10 ++++++++++
>  security/ipe/audit.c                  |  2 ++
>  security/ipe/eval.c                   | 26 ++++++++++++++++++++++++++
>  security/ipe/policy.h                 |  2 ++
>  security/ipe/policy_parser.c          |  4 ++++
>  7 files changed, 60 insertions(+), 4 deletions(-)