linux-kernel - Re: [PATCH] IMA: do not measure everything opened by root by default

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Message-Id: <1242306764.4647.6.camel@dyn9002018117.watson.ibm.com>
Date:	Thu, 14 May 2009 09:12:44 -0400
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	Eric Paris <eparis@...hat.com>
Cc:	jmorris@...ei.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] IMA: do not measure everything opened by root by
 default

On Tue, 2009-05-12 at 15:14 -0400, Eric Paris wrote:
> The IMA default policy measures every single file opened by root.  This is
> terrible for most users.  Consider a system (like mine) with virtual machine
> images.  When those images are touched (which happens at boot for me) those
> images are measured.  This is just way too much for the default case.
> 
> Signed-off-by: Eric Paris <eparis@...hat.com>

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

> ---
> 
>  security/integrity/ima/ima_policy.c |    2 --
>  1 files changed, 0 insertions(+), 2 deletions(-)
> 
> diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
> index b168c1d..dec6dcb 100644
> --- a/security/integrity/ima/ima_policy.c
> +++ b/security/integrity/ima/ima_policy.c
> @@ -61,8 +61,6 @@ static struct ima_measure_rule_entry default_rules[] = {
>  	 .flags = IMA_FUNC | IMA_MASK},
>  	{.action = MEASURE,.func = BPRM_CHECK,.mask = MAY_EXEC,
>  	 .flags = IMA_FUNC | IMA_MASK},
> -	{.action = MEASURE,.func = PATH_CHECK,.mask = MAY_READ,.uid = 0,
> -	 .flags = IMA_FUNC | IMA_MASK | IMA_UID}
>  };
> 
>  static LIST_HEAD(measure_default_rules);
> 

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