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Message-ID: <20240209-gelee-parken-3ecebd605e73@brauner>
Date: Fri, 9 Feb 2024 10:52:10 +0100
From: Christian Brauner <brauner@...nel.org>
To: Roberto Sassu <roberto.sassu@...weicloud.com>
Cc: viro@...iv.linux.org.uk, chuck.lever@...cle.com, jlayton@...nel.org,
neilb@...e.de, kolga@...app.com, Dai.Ngo@...cle.com, tom@...pey.com,
paul@...l-moore.com, jmorris@...ei.org, serge@...lyn.com, zohar@...ux.ibm.com,
dmitry.kasatkin@...il.com, eric.snowberg@...cle.com, dhowells@...hat.com, jarkko@...nel.org,
stephen.smalley.work@...il.com, eparis@...isplace.org, casey@...aufler-ca.com, shuah@...nel.org,
mic@...ikod.net, linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
linux-nfs@...r.kernel.org, linux-security-module@...r.kernel.org,
linux-integrity@...r.kernel.org, keyrings@...r.kernel.org, selinux@...r.kernel.org,
linux-kselftest@...r.kernel.org, Roberto Sassu <roberto.sassu@...wei.com>,
Stefan Berger <stefanb@...ux.ibm.com>
Subject: Re: [PATCH v9 17/25] security: Introduce inode_post_remove_acl hook
On Mon, Jan 15, 2024 at 07:18:01PM +0100, Roberto Sassu wrote:
> From: Roberto Sassu <roberto.sassu@...wei.com>
>
> In preparation for moving IMA and EVM to the LSM infrastructure, introduce
> the inode_post_remove_acl hook.
>
> At inode_remove_acl hook, EVM verifies the file's existing HMAC value. At
> inode_post_remove_acl, EVM re-calculates the file's HMAC with the passed
> POSIX ACL removed and other file metadata.
>
> Other LSMs could similarly take some action after successful POSIX ACL
> removal.
>
> The new hook cannot return an error and cannot cause the operation to be
> reverted.
>
> Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
> Reviewed-by: Stefan Berger <stefanb@...ux.ibm.com>
> Acked-by: Casey Schaufler <casey@...aufler-ca.com>
> Reviewed-by: Mimi Zohar <zohar@...ux.ibm.com>
> ---
> fs/posix_acl.c | 1 +
Acked-by: Christian Brauner <brauner@...nel.org>
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