diff options
| -rw-r--r-- | security/integrity/ima/ima_policy.c | 41 |
1 files changed, 32 insertions, 9 deletions
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index 8040215c0252..2edff7f58c25 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -545,6 +545,9 @@ static bool ima_match_rules(struct ima_rule_entry *rule, const char *func_data) { int i; + bool result = false; + struct ima_rule_entry *lsm_rule = rule; + bool rule_reinitialized = false; if ((rule->flags & IMA_FUNC) && (rule->func != func && func != POST_SETATTR)) @@ -606,35 +609,55 @@ static bool ima_match_rules(struct ima_rule_entry *rule, int rc = 0; u32 osid; - if (!rule->lsm[i].rule) { - if (!rule->lsm[i].args_p) + if (!lsm_rule->lsm[i].rule) { + if (!lsm_rule->lsm[i].args_p) continue; else return false; } + +retry: switch (i) { case LSM_OBJ_USER: case LSM_OBJ_ROLE: case LSM_OBJ_TYPE: security_inode_getsecid(inode, &osid); - rc = ima_filter_rule_match(osid, rule->lsm[i].type, + rc = ima_filter_rule_match(osid, lsm_rule->lsm[i].type, Audit_equal, - rule->lsm[i].rule); + lsm_rule->lsm[i].rule); break; case LSM_SUBJ_USER: case LSM_SUBJ_ROLE: case LSM_SUBJ_TYPE: - rc = ima_filter_rule_match(secid, rule->lsm[i].type, + rc = ima_filter_rule_match(secid, lsm_rule->lsm[i].type, Audit_equal, - rule->lsm[i].rule); + lsm_rule->lsm[i].rule); break; default: break; } - if (!rc) - return false; + + if (rc == -ESTALE && !rule_reinitialized) { + lsm_rule = ima_lsm_copy_rule(rule); + if (lsm_rule) { + rule_reinitialized = true; + goto retry; + } + } + if (!rc) { + result = false; + goto out; + } } - return true; + result = true; + +out: + if (rule_reinitialized) { + for (i = 0; i < MAX_LSM_RULES; i++) + ima_filter_rule_free(lsm_rule->lsm[i].rule); + kfree(lsm_rule); + } + return result; } /* |