linux-kernel - [PATCH-v2 1/3] ima: added error messages to template-related functions

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Message-Id: <1386334640-31393-2-git-send-email-roberto.sassu@polito.it>
Date:	Fri,  6 Dec 2013 13:57:15 +0100
From:	Roberto Sassu <roberto.sassu@...ito.it>
To:	jmorris@...ei.org, zohar@...ux.vnet.ibm.com
Cc:	d.kasatkin@...sung.com, linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-ima-devel@...ts.sourceforge.net,
	Roberto Sassu <roberto.sassu@...ito.it>
Subject: [PATCH-v2 1/3] ima: added error messages to template-related functions

This patch adds some error messages to inform users about the following
events: template descriptor not found, template field not found, and
template initialization failed.

Signed-off-by: Roberto Sassu <roberto.sassu@...ito.it>
Signed-off-by: Mimi Zohar <zohar@...ux.vnet.ibm.com>
---
 security/integrity/ima/ima_template.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/security/integrity/ima/ima_template.c b/security/integrity/ima/ima_template.c
index 635695f..a001477 100644
--- a/security/integrity/ima/ima_template.c
+++ b/security/integrity/ima/ima_template.c
@@ -49,8 +49,11 @@ static int __init ima_template_setup(char *str)
 	 * If not, use CONFIG_IMA_DEFAULT_TEMPLATE.
 	 */
 	template_desc = lookup_template_desc(str);
-	if (!template_desc)
+	if (!template_desc) {
+		pr_err("IMA: template %s not found, using %s\n",
+		       str, CONFIG_IMA_DEFAULT_TEMPLATE);
 		return 1;
+	}
 
 	/*
 	 * Verify whether the current hash algorithm is supported
@@ -134,6 +137,7 @@ static int template_desc_init_fields(const char *template_fmt,
 		struct ima_template_field *f = lookup_template_field(c);
 
 		if (!f) {
+			pr_err("IMA: field '%s' not found\n", c);
 			result = -ENOENT;
 			goto out;
 		}
@@ -161,8 +165,12 @@ static int init_defined_templates(void)
 		result = template_desc_init_fields(template->fmt,
 						   &(template->fields),
 						   &(template->num_fields));
-		if (result < 0)
+		if (result < 0) {
+			pr_err("IMA: template %s init failed, result: %d\n",
+			       (strlen(template->name) ?
+			       template->name : template->fmt), result);
 			return result;
+		}
 	}
 	return result;
 }
-- 
1.8.1.4


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