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Date:   Thu, 14 May 2020 13:37:49 +1000 (AEST)
From:   James Morris <jmorris@namei.org>
To:     =?ISO-8859-15?Q?Micka=EBl_Sala=FCn?= <mic@digikod.net>
cc:     linux-kernel@vger.kernel.org, Al Viro <viro@zeniv.linux.org.uk>,
        Andy Lutomirski <luto@amacapital.net>,
        Arnd Bergmann <arnd@arndb.de>,
        Casey Schaufler <casey@schaufler-ca.com>,
        Jann Horn <jannh@google.com>, Jonathan Corbet <corbet@lwn.net>,
        Kees Cook <keescook@chromium.org>,
        Michael Kerrisk <mtk.manpages@gmail.com>,
        =?ISO-8859-15?Q?Micka=EBl_Sala=FCn?= <mickael.salaun@ssi.gouv.fr>,
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        Shuah Khan <shuah@kernel.org>,
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        kernel-hardening@lists.openwall.com, linux-api@vger.kernel.org,
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Subject: Re: [PATCH v17 05/10] fs,landlock: Support filesystem
 access-control
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On Mon, 11 May 2020, Mickaël Salaün wrote:


> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 45cc10cdf6dd..2276642f8e05 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -1517,6 +1517,11 @@ struct super_block {
>  	/* Pending fsnotify inode refs */
>  	atomic_long_t s_fsnotify_inode_refs;
>  
> +#ifdef CONFIG_SECURITY_LANDLOCK
> +	/* References to Landlock underlying objects */
> +	atomic_long_t s_landlock_inode_refs;
> +#endif
> +

This needs to be converted to the LSM API via superblock blob stacking.

See Casey's old patch: 
https://lore.kernel.org/linux-security-module/20190829232935.7099-2-casey@schaufler-ca.com/


-- 
James Morris
<jmorris@namei.org>

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