[RFC][PATCH 1/4] ima: added error messages to template-related functions

[Roberto Sassu]

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@xxxxxxxxx>
---
 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 4e5da99..7bcff5c 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
@@ -127,6 +130,7 @@ static int template_desc_init_fields(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;
 		}
@@ -152,8 +156,12 @@ 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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