linux-kernel - Re: [PATCH v2 3/6] ima: Log the same audit cause whenever a file has no signature

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Date:   Thu, 15 Jun 2017 12:00:56 -0400
From:   Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:     Thiago Jung Bauermann <bauerman@...ux.vnet.ibm.com>,
        linux-security-module@...r.kernel.org
Cc:     linux-ima-devel@...ts.sourceforge.net, keyrings@...r.kernel.org,
        linux-crypto@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org,
        Dmitry Kasatkin <dmitry.kasatkin@...il.com>,
        James Morris <james.l.morris@...cle.com>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        David Howells <dhowells@...hat.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Jessica Yu <jeyu@...hat.com>,
        Rusty Russell <rusty@...tcorp.com.au>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        "AKASHI, Takahiro" <takahiro.akashi@...aro.org>
Subject: Re: [PATCH v2 3/6] ima: Log the same audit cause whenever a file
 has no signature

On Wed, 2017-06-07 at 22:49 -0300, Thiago Jung Bauermann wrote:
> If the file doesn't have an xattr, ima_appraise_measurement sets cause to
> "missing-hash" while if there's an xattr but it's a digest instead of a
> signature it sets cause to "IMA-signature-required".
> 
> Fix it by setting cause to "IMA-signature-required" in both cases.
> 
> Signed-off-by: Thiago Jung Bauermann <bauerman@...ux.vnet.ibm.com>

Thank you.  Queued to be upstreamed.

Mimi
> ---
>  security/integrity/ima/ima_appraise.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
> index ea36a4f134f4..809ba70fbbbf 100644
> --- a/security/integrity/ima/ima_appraise.c
> +++ b/security/integrity/ima/ima_appraise.c
> @@ -217,7 +217,8 @@ int ima_appraise_measurement(enum ima_hooks func,
>  		if (rc && rc != -ENODATA)
>  			goto out;
> 
> -		cause = "missing-hash";
> +		cause = iint->flags & IMA_DIGSIG_REQUIRED ?
> +				"IMA-signature-required" : "missing-hash";
>  		status = INTEGRITY_NOLABEL;
>  		if (opened & FILE_CREATED)
>  			iint->flags |= IMA_NEW_FILE;