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| author |   Roberto Sassu <roberto.sassu@polito.it> | 2014-10-13 14:08:38 +0200 |
|---|---|---|
| committer |   Mimi Zohar <zohar@linux.vnet.ibm.com> | 2014-10-13 08:39:01 -0400 |
| commit | 71fed2eee0ea76b236f491006078c9d636323184 (patch) | |
| tree | a088eed632515837503be22bfbceecd2916ea26b /security/integrity/ima/ima_template.c | |
| parent | ima: use atomic bit operations to protect policy update interface (diff) | |
| download | linux-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/ima/ima_template.c')
| -rw-r--r-- | security/integrity/ima/ima_template.c | 22 |
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; } |