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Subject: Re: [PATCH v3 13/25] security: Introduce inode_post_removexattr hook
From:   Mimi Zohar <zohar@linux.ibm.com>
To:     Roberto Sassu <roberto.sassu@huaweicloud.com>,
        viro@zeniv.linux.org.uk, brauner@kernel.org,
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Cc:     linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-nfs@vger.kernel.org, linux-integrity@vger.kernel.org,
        linux-security-module@vger.kernel.org, keyrings@vger.kernel.org,
        selinux@vger.kernel.org, Roberto Sassu <roberto.sassu@huawei.com>
Date:   Wed, 11 Oct 2023 20:09:15 -0400
In-Reply-To: <20230904133415.1799503-14-roberto.sassu@huaweicloud.com>
References: <20230904133415.1799503-1-roberto.sassu@huaweicloud.com>
         <20230904133415.1799503-14-roberto.sassu@huaweicloud.com>
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On Mon, 2023-09-04 at 15:34 +0200, Roberto Sassu wrote:
> From: Roberto Sassu <roberto.sassu@huawei.com>
> 
> In preparation for moving IMA and EVM to the LSM infrastructure, introduce
> the inode_post_removexattr hook.
> 
> It is useful for EVM to recalculate the HMAC on the remaining file xattrs,
> and other file metadata, after it verified the HMAC of current file
> metadata with the inode_removexattr hook.
> 
> LSMs should use the new hook instead of inode_removexattr, when they need
> to know that the operation was done successfully (not known in
> inode_removexattr). 

> The new hook cannot return an error and cannot cause
> the operation to be reverted.
> 
> Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>

Refer to the patch description comments for 12/25.

Otherwise,

Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>