diff options
Diffstat (limited to 'security/integrity/ima/ima_policy.c')
| -rw-r--r-- | security/integrity/ima/ima_policy.c | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index 1a95830..3e22e17 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -25,7 +25,13 @@ #define IMA_FSMAGIC 0x0004 #define IMA_UID 0x0008 -enum ima_action { UNKNOWN = -1, DONT_MEASURE = 0, MEASURE }; +#define UNKNOWN 0 +#define MEASURE 1 /* same as IMA_MEASURE */ +#define DONT_MEASURE 2 +#define MEASURE_MASK 3 +#define APPRAISE 4 /* same as IMA_APPRAISE */ +#define DONT_APPRAISE 8 +#define APPRAISE_MASK 12 #define MAX_LSM_RULES 6 enum lsm_rule_types { LSM_OBJ_USER, LSM_OBJ_ROLE, LSM_OBJ_TYPE, @@ -34,7 +40,7 @@ enum lsm_rule_types { LSM_OBJ_USER, LSM_OBJ_ROLE, LSM_OBJ_TYPE, struct ima_measure_rule_entry { struct list_head list; - enum ima_action action; + int action; unsigned int flags; enum ima_hooks func; int mask; @@ -163,18 +169,28 @@ static bool ima_match_rules(struct ima_measure_rule_entry *rule, * as elements in the list are never deleted, nor does the list * change.) */ -int ima_match_policy(struct inode *inode, enum ima_hooks func, int mask) +int ima_match_policy(struct inode *inode, enum ima_hooks func, int mask, + int flags) { struct ima_measure_rule_entry *entry; + int action = 0, actmask = flags | (flags << 1); list_for_each_entry(entry, ima_measure, list) { - bool rc; - rc = ima_match_rules(entry, inode, func, mask); - if (rc) - return entry->action; + if (!(entry->action & actmask)) + continue; + + if (!ima_match_rules(entry, inode, func, mask)) + continue; + + action |= (entry->action & (IMA_APPRAISE | IMA_MEASURE)); + actmask &= (entry->action & APPRAISE_MASK) ? + ~APPRAISE_MASK : ~MEASURE_MASK; + if (!actmask) + break; } - return 0; + + return action; } /** |