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Date: Fri, 9 Feb 2024 10:59:42 +0100
From: Christian Brauner <brauner@kernel.org>
To: Roberto Sassu <roberto.sassu@huaweicloud.com>
Cc: viro@zeniv.linux.org.uk, chuck.lever@oracle.com, jlayton@kernel.org, 
	neilb@suse.de, kolga@netapp.com, Dai.Ngo@oracle.com, tom@talpey.com, 
	paul@paul-moore.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, 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
Message-ID: <20240209-kunterbunt-abgefackelt-04b54394da2a@brauner>
References: <20240115181809.885385-1-roberto.sassu@huaweicloud.com>
 <20240115181809.885385-13-roberto.sassu@huaweicloud.com>
 <20240209-wertlos-opern-45e9bce87014@brauner>
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In-Reply-To: <20240209-wertlos-opern-45e9bce87014@brauner>

On Fri, Feb 09, 2024 at 10:56:33AM +0100, Christian Brauner wrote:
> On Mon, Jan 15, 2024 at 07:17:56PM +0100, Roberto Sassu wrote:
> > From: Roberto Sassu <roberto.sassu@huawei.com>
> > 
> > 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 ++
> 
> Acked-by: Christian Brauner <brauner@kernel.org>

Redacting that. I have a question.