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Date: Wed, 07 Feb 2024 22:18:43 -0500
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From: Paul Moore <paul@paul-moore.com>
To: Roberto Sassu <roberto.sassu@huaweicloud.com>, viro@zeniv.linux.org.uk, brauner@kernel.org, chuck.lever@oracle.com, jlayton@kernel.org, neilb@suse.de, kolga@netapp.com, Dai.Ngo@oracle.com, tom@talpey.com, jmorris@namei.org, serge@hallyn.com, zohar@linux.ibm.com, dmitry.kasatkin@gmail.com, eric.snowberg@oracle.com, dhowells@redhat.com, jarkko@kernel.org, stephen.smalley.work@gmail.com, eparis@parisplace.org, casey@schaufler-ca.com, shuah@kernel.org, mic@digikod.net
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-security-module@vger.kernel.org, linux-integrity@vger.kernel.org, keyrings@vger.kernel.org, selinux@vger.kernel.org, linux-kselftest@vger.kernel.org, Roberto Sassu <roberto.sassu@huawei.com>, Stefan Berger <stefanb@linux.ibm.com>
Subject: Re: [PATCH v9 12/25] security: Introduce file_post_open hook
References: <20240115181809.885385-13-roberto.sassu@huaweicloud.com>
In-Reply-To: <20240115181809.885385-13-roberto.sassu@huaweicloud.com>

On Jan 15, 2024 Roberto Sassu <roberto.sassu@huaweicloud.com> wrote:
> 
> In preparation to move IMA and EVM to the LSM infrastructure, introduce the
> file_post_open hook. Also, export security_file_post_open() for NFS.
> 
> Based on policy, IMA calculates the digest of the file content and
> extends the TPM with the digest, verifies the file's integrity based on
> the digest, and/or includes the file digest in the audit log.
> 
> LSMs could similarly take action depending on the file content and the
> access mask requested with open().
> 
> The new hook returns a value and can cause the open to be aborted.
> 
> Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
> Reviewed-by: Stefan Berger <stefanb@linux.ibm.com>
> Acked-by: Casey Schaufler <casey@schaufler-ca.com>
> Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
> ---
>  fs/namei.c                    |  2 ++
>  fs/nfsd/vfs.c                 |  6 ++++++
>  include/linux/lsm_hook_defs.h |  1 +
>  include/linux/security.h      |  6 ++++++
>  security/security.c           | 17 +++++++++++++++++
>  5 files changed, 32 insertions(+)

Acked-by: Paul Moore <paul@paul-moore.com>

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