diff options
Diffstat (limited to 'security/smack/smack_access.c')
| -rw-r--r-- | security/smack/smack_access.c | 43 |
1 files changed, 23 insertions, 20 deletions
diff --git a/security/smack/smack_access.c b/security/smack/smack_access.c index 2e397a88d410..6a0377f38620 100644 --- a/security/smack/smack_access.c +++ b/security/smack/smack_access.c @@ -93,7 +93,7 @@ int smk_access_entry(char *subject_label, char *object_label, list_for_each_entry_rcu(srp, rule_list, list) { if (srp->smk_object == object_label && - srp->smk_subject == subject_label) { + srp->smk_subject->smk_known == subject_label) { may = srp->smk_access; break; } @@ -104,7 +104,7 @@ int smk_access_entry(char *subject_label, char *object_label, /** * smk_access - determine if a subject has a specific access to an object - * @subject_label: a pointer to the subject's Smack label + * @subject_known: a pointer to the subject's Smack label entry * @object_label: a pointer to the object's Smack label * @request: the access requested, in "MAY" format * @a : a pointer to the audit data @@ -115,10 +115,9 @@ int smk_access_entry(char *subject_label, char *object_label, * * Smack labels are shared on smack_list */ -int smk_access(char *subject_label, char *object_label, int request, - struct smk_audit_info *a) +int smk_access(struct smack_known *subject_known, char *object_label, + int request, struct smk_audit_info *a) { - struct smack_known *skp; int may = MAY_NOT; int rc = 0; @@ -127,7 +126,7 @@ int smk_access(char *subject_label, char *object_label, int request, * * A star subject can't access any object. */ - if (subject_label == smack_known_star.smk_known) { + if (subject_known == &smack_known_star) { rc = -EACCES; goto out_audit; } @@ -137,7 +136,7 @@ int smk_access(char *subject_label, char *object_label, int request, * An internet subject can access any object. */ if (object_label == smack_known_web.smk_known || - subject_label == smack_known_web.smk_known) + subject_known == &smack_known_web) goto out_audit; /* * A star object can be accessed by any subject. @@ -148,7 +147,7 @@ int smk_access(char *subject_label, char *object_label, int request, * An object can be accessed in any way by a subject * with the same label. */ - if (subject_label == object_label) + if (subject_known->smk_known == object_label) goto out_audit; /* * A hat subject can read any object. @@ -157,7 +156,7 @@ int smk_access(char *subject_label, char *object_label, int request, if ((request & MAY_ANYREAD) == request) { if (object_label == smack_known_floor.smk_known) goto out_audit; - if (subject_label == smack_known_hat.smk_known) + if (subject_known == &smack_known_hat) goto out_audit; } /* @@ -167,9 +166,9 @@ int smk_access(char *subject_label, char *object_label, int request, * good. A negative response from smk_access_entry() * indicates there is no entry for this pair. */ - skp = smk_find_entry(subject_label); rcu_read_lock(); - may = smk_access_entry(subject_label, object_label, &skp->smk_rules); + may = smk_access_entry(subject_known->smk_known, object_label, + &subject_known->smk_rules); rcu_read_unlock(); if (may > 0 && (request & may) == request) @@ -179,7 +178,8 @@ int smk_access(char *subject_label, char *object_label, int request, out_audit: #ifdef CONFIG_AUDIT if (a) - smack_log(subject_label, object_label, request, rc, a); + smack_log(subject_known->smk_known, object_label, request, + rc, a); #endif return rc; } @@ -198,20 +198,21 @@ out_audit: int smk_curacc(char *obj_label, u32 mode, struct smk_audit_info *a) { struct task_smack *tsp = current_security(); - char *sp = smk_of_task(tsp); + struct smack_known *skp = smk_of_task(tsp); int may; int rc; /* * Check the global rule list */ - rc = smk_access(sp, obj_label, mode, NULL); + rc = smk_access(skp, obj_label, mode, NULL); if (rc == 0) { /* * If there is an entry in the task's rule list * it can further restrict access. */ - may = smk_access_entry(sp, obj_label, &tsp->smk_rules); + may = smk_access_entry(skp->smk_known, obj_label, + &tsp->smk_rules); if (may < 0) goto out_audit; if ((mode & may) == mode) @@ -228,7 +229,7 @@ int smk_curacc(char *obj_label, u32 mode, struct smk_audit_info *a) out_audit: #ifdef CONFIG_AUDIT if (a) - smack_log(sp, obj_label, mode, rc, a); + smack_log(skp->smk_known, obj_label, mode, rc, a); #endif return rc; } @@ -402,6 +403,8 @@ int smk_netlbl_mls(int level, char *catset, struct netlbl_lsm_secattr *sap, sap->flags |= NETLBL_SECATTR_MLS_CAT; sap->attr.mls.lvl = level; sap->attr.mls.cat = netlbl_secattr_catmap_alloc(GFP_ATOMIC); + if (!sap->attr.mls.cat) + return -ENOMEM; sap->attr.mls.cat->startbit = 0; for (cat = 1, cp = catset, byte = 0; byte < len; cp++, byte++) @@ -513,10 +516,10 @@ char *smk_import(const char *string, int len) * smack_from_secid - find the Smack label associated with a secid * @secid: an integer that might be associated with a Smack label * - * Returns a pointer to the appropriate Smack label if there is one, + * Returns a pointer to the appropriate Smack label entry if there is one, * otherwise a pointer to the invalid Smack label. */ -char *smack_from_secid(const u32 secid) +struct smack_known *smack_from_secid(const u32 secid) { struct smack_known *skp; @@ -524,7 +527,7 @@ char *smack_from_secid(const u32 secid) list_for_each_entry_rcu(skp, &smack_known_list, list) { if (skp->smk_secid == secid) { rcu_read_unlock(); - return skp->smk_known; + return skp; } } @@ -533,7 +536,7 @@ char *smack_from_secid(const u32 secid) * of a secid that is not on the list. */ rcu_read_unlock(); - return smack_known_invalid.smk_known; + return &smack_known_invalid; } /** |