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authorRoberto Sassu <roberto.sassu@polito.it>2014-10-13 14:08:38 +0200
committerMimi Zohar <zohar@linux.vnet.ibm.com>2014-10-13 08:39:01 -0400
commit71fed2eee0ea76b236f491006078c9d636323184 (patch)
treea088eed632515837503be22bfbceecd2916ea26b /security/integrity
parentima: use atomic bit operations to protect policy update interface (diff)
downloadlinux-dev-71fed2eee0ea76b236f491006078c9d636323184.tar.xz
linux-dev-71fed2eee0ea76b236f491006078c9d636323184.zip
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, invalid template descriptor, template field not found and template initialization failed. Changelog: - v2: - display an error message if the format string contains too many fields (Roberto Sassu) Signed-off-by: Roberto Sassu <roberto.sassu@polito.it> Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Diffstat (limited to 'security/integrity')
-rw-r--r--security/integrity/ima/ima_template.c22
1 files changed, 17 insertions, 5 deletions
diff --git a/security/integrity/ima/ima_template.c b/security/integrity/ima/ima_template.c
index e854862c9337..1310afc587f3 100644
--- a/security/integrity/ima/ima_template.c
+++ b/security/integrity/ima/ima_template.c
@@ -52,8 +52,11 @@ 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("template %s not found, using %s\n",
+ str, CONFIG_IMA_DEFAULT_TEMPLATE);
return 1;
+ }
/*
* Verify whether the current hash algorithm is supported
@@ -117,8 +120,11 @@ static int template_desc_init_fields(const char *template_fmt,
int template_num_fields = template_fmt_size(template_fmt);
int i, result = 0;
- if (template_num_fields > IMA_TEMPLATE_NUM_FIELDS_MAX)
+ if (template_num_fields > IMA_TEMPLATE_NUM_FIELDS_MAX) {
+ pr_err("format string '%s' contains too many fields\n",
+ template_fmt);
return -EINVAL;
+ }
/* copying is needed as strsep() modifies the original buffer */
template_fmt_copy = kstrdup(template_fmt, GFP_KERNEL);
@@ -137,6 +143,7 @@ static int template_desc_init_fields(const char *template_fmt,
struct ima_template_field *f = lookup_template_field(c);
if (!f) {
+ pr_err("field '%s' not found\n", c);
result = -ENOENT;
goto out;
}
@@ -163,8 +170,13 @@ struct ima_template_desc *ima_template_desc_current(void)
int __init ima_init_template(void)
{
struct ima_template_desc *template = ima_template_desc_current();
+ int result;
- return template_desc_init_fields(template->fmt,
- &(template->fields),
- &(template->num_fields));
+ result = template_desc_init_fields(template->fmt,
+ &(template->fields),
+ &(template->num_fields));
+ if (result < 0)
+ pr_err("template %s init failed, result: %d\n", template->name);
+
+ return result;
}