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Message-ID: <CAHC9VhRk_9EJ0VfsUcOJfskY+dXbjsJW3U_x7ar08MK-8KKtiA@mail.gmail.com>
Date: Tue, 10 Dec 2024 16:29:16 -0500
From: Paul Moore <paul@...l-moore.com>
To: Mickaël Salaün <mic@...ikod.net>,
Mimi Zohar <zohar@...ux.ibm.com>, Roberto Sassu <roberto.sassu@...wei.com>
Cc: Al Viro <viro@...iv.linux.org.uk>, Christian Brauner <brauner@...nel.org>,
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linux-security-module@...r.kernel.org
Subject: Re: [PATCH v22 8/8] ima: instantiate the bprm_creds_for_exec() hook
On Thu, Dec 5, 2024 at 11:10 AM Mickaël Salaün <mic@...ikod.net> wrote:
>
> From: Mimi Zohar <zohar@...ux.ibm.com>
>
> Like direct file execution (e.g. ./script.sh), indirect file execution
> (e.g. sh script.sh) needs to be measured and appraised. Instantiate
> the new security_bprm_creds_for_exec() hook to measure and verify the
> indirect file's integrity. Unlike direct file execution, indirect file
> execution is optionally enforced by the interpreter.
>
> Differentiate kernel and userspace enforced integrity audit messages.
>
> Co-developed-by: Roberto Sassu <roberto.sassu@...wei.com>
> Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
> Signed-off-by: Mimi Zohar <zohar@...ux.ibm.com>
> Link: https://lore.kernel.org/r/20241204192514.40308-1-zohar@linux.ibm.com
> Reviewed-by: Mickaël Salaün <mic@...ikod.net>
> Signed-off-by: Mickaël Salaün <mic@...ikod.net>
> Link: https://lore.kernel.org/r/20241205160925.230119-9-mic@digikod.net
> ---
>
> I added both a Reviewed-by and a Signed-off-by because I may not be the
> committer.
>
> Changes since v21:
> * New patch cherry-picked from IMA's patch v3:
> https://lore.kernel.org/r/67b2e94f263bf9a0099efe74cce659d6acb16fe9.camel@linux.ibm.com
> * Fix a typo in comment: s/execvat/execveat/ .
> ---
> include/uapi/linux/audit.h | 1 +
> security/integrity/ima/ima_appraise.c | 27 +++++++++++++++++++++++--
> security/integrity/ima/ima_main.c | 29 +++++++++++++++++++++++++++
> 3 files changed, 55 insertions(+), 2 deletions(-)
>
> diff --git a/include/uapi/linux/audit.h b/include/uapi/linux/audit.h
> index 75e21a135483..826337905466 100644
> --- a/include/uapi/linux/audit.h
> +++ b/include/uapi/linux/audit.h
> @@ -161,6 +161,7 @@
> #define AUDIT_INTEGRITY_RULE 1805 /* policy rule */
> #define AUDIT_INTEGRITY_EVM_XATTR 1806 /* New EVM-covered xattr */
> #define AUDIT_INTEGRITY_POLICY_RULE 1807 /* IMA policy rules */
> +#define AUDIT_INTEGRITY_DATA_CHECK 1808 /* Userspace enforced data integrity */
FWIW, in the last discussion I believe Mimi preferred the name
AUDIT_INTEGRITY_USERSPACE.
https://lore.kernel.org/linux-security-module/b6dc4d8b23b822638ab676055809503060c0bca2.camel@linux.ibm.com
--
paul-moore.com
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