linux-kernel - Re: [PATCH v9 14/25] security: Introduce path_post

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Message-ID: <20240209-warten-anstreben-54d2c519fba8@brauner>
Date: Fri, 9 Feb 2024 10:54:10 +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>
Subject: Re: [PATCH v9 14/25] security: Introduce path_post_mknod hook

On Mon, Jan 15, 2024 at 07:17:58PM +0100, Roberto Sassu wrote:
> From: Roberto Sassu <roberto.sassu@...wei.com>
> 
> In preparation for moving IMA and EVM to the LSM infrastructure, introduce
> the path_post_mknod hook.
> 
> IMA-appraisal requires all existing files in policy to have a file
> hash/signature stored in security.ima. An exception is made for empty files
> created by mknod, by tagging them as new files.
> 
> LSMs could also take some action after files are created.
> 
> The new hook cannot return an error and cannot cause the operation to be
> reverted.
> 
> Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>
> Acked-by: Casey Schaufler <casey@...aufler-ca.com>
> Reviewed-by: Mimi Zohar <zohar@...ux.ibm.com>
> ---
>  fs/namei.c                    |  5 +++++

Acked-by: Christian Brauner <brauner@...nel.org>