diff options
Diffstat (limited to 'security/integrity/ima/ima_main.c')
| -rw-r--r-- | security/integrity/ima/ima_main.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index 82c9d62bcb11..2d1af8899cab 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -51,18 +51,23 @@ static int __init hash_setup(char *str) return 1; if (strcmp(template_desc->name, IMA_TEMPLATE_IMA_NAME) == 0) { - if (strncmp(str, "sha1", 4) == 0) + if (strncmp(str, "sha1", 4) == 0) { ima_hash_algo = HASH_ALGO_SHA1; - else if (strncmp(str, "md5", 3) == 0) + } else if (strncmp(str, "md5", 3) == 0) { ima_hash_algo = HASH_ALGO_MD5; - else + } else { + pr_err("invalid hash algorithm \"%s\" for template \"%s\"", + str, IMA_TEMPLATE_IMA_NAME); return 1; + } goto out; } i = match_string(hash_algo_name, HASH_ALGO__LAST, str); - if (i < 0) + if (i < 0) { + pr_err("invalid hash algorithm \"%s\"", str); return 1; + } ima_hash_algo = i; out: @@ -532,6 +537,16 @@ int ima_file_hash(struct file *file, char *buf, size_t buf_size) return -EOPNOTSUPP; mutex_lock(&iint->mutex); + + /* + * ima_file_hash can be called when ima_collect_measurement has still + * not been called, we might not always have a hash. + */ + if (!iint->ima_hash) { + mutex_unlock(&iint->mutex); + return -EOPNOTSUPP; + } + if (buf) { size_t copied_size; |