linux-kernel - Re: [PATCH v4 5/5] evm: Support multiple LSMs providing an xattr

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Message-ID: <eda23c9935712cf122bb6a8929b53835d56df6cb.camel@linux.ibm.com>
Date:   Thu, 17 Nov 2022 12:09:44 -0500
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Roberto Sassu <roberto.sassu@...weicloud.com>,
        dmitry.kasatkin@...il.com, paul@...l-moore.com, jmorris@...ei.org,
        serge@...lyn.com, stephen.smalley.work@...il.com,
        eparis@...isplace.org, casey@...aufler-ca.com
Cc:     linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, selinux@...r.kernel.org,
        reiserfs-devel@...r.kernel.org, linux-kernel@...r.kernel.org,
        keescook@...omium.org, nicolas.bouchinet@...p-os.org,
        Roberto Sassu <roberto.sassu@...wei.com>
Subject: Re: [PATCH v4 5/5] evm: Support multiple LSMs providing an xattr

On Thu, 2022-11-10 at 10:46 +0100, Roberto Sassu wrote:
> From: Roberto Sassu <roberto.sassu@...wei.com>
> 
> Currently, evm_inode_init_security() processes a single LSM xattr from
> the array passed by security_inode_init_security(), and calculates the
> HMAC on it and other inode metadata.
> 
> Given that initxattrs() callbacks, called by
> security_inode_init_security(), expect that this array is terminated when
> the xattr name is set to NULL, reuse the same assumption to scan all xattrs
> and to calculate the HMAC on all of them.
> 
> Signed-off-by: Roberto Sassu <roberto.sassu@...wei.com>

Thanks, Roberto.  This looks good.

Mimi