linux-kernel - Re: [RFC][PATCH 3/4]integrity: Linux Integrity Module(LIM)

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Message-ID: <Xine.LNX.4.64.0805221203350.32056@us.intercode.com.au>
Date:	Thu, 22 May 2008 12:08:55 +1000 (EST)
From:	James Morris <jmorris@...ei.org>
To:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
cc:	linux-kernel@...r.kernel.org, safford@...son.ibm.com,
	serue@...ux.vnet.ibm.com, sailer@...son.ibm.com, zohar@...ibm.com,
	Stephen Smalley <sds@...ho.nsa.gov>,
	CaseySchaufler <casey@...aufler-ca.com>
Subject: Re: [RFC][PATCH 3/4]integrity: Linux Integrity Module(LIM)

On Wed, 21 May 2008, Mimi Zohar wrote:

> +int register_template(char *template_name,
> +			struct template_operations *template_ops)
> +{
> +	int template_len;
> +	struct template_list_entry *entry;
> +
> +	if (!template_initialized++)
> +		INIT_LIST_HEAD(&integrity_templates);
> +
> +	entry = kmalloc(sizeof(*entry), GFP_ATOMIC);
> +	INIT_LIST_HEAD(&entry->template);
> +
> +	template_len = strlen(template_name);
> +	if (template_len > TEMPLATE_NAME_LEN_MAX)
> +		template_len = TEMPLATE_NAME_LEN_MAX;
> +	memcpy(entry->template_name, template_name, template_len);
> +	entry->template_name[template_len] = '\0';
> +	entry->template_ops = template_ops;
> +	list_add(&entry->template, &integrity_templates);
> +
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(register_template);

There's no locking around the mainpulation of integrity_templates list.  
It seems that this could lead to list corruption.



- James
-- 
James Morris
<jmorris@...ei.org>
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