diff options
Diffstat (limited to 'security/apparmor/include/policy.h')
| -rw-r--r-- | security/apparmor/include/policy.h | 68 |
1 files changed, 44 insertions, 24 deletions
diff --git a/security/apparmor/include/policy.h b/security/apparmor/include/policy.h index 545f791cabda..75088cc310b6 100644 --- a/security/apparmor/include/policy.h +++ b/security/apparmor/include/policy.h @@ -34,6 +34,7 @@ struct aa_ns; extern int unprivileged_userns_apparmor_policy; +extern int aa_unprivileged_unconfined_restricted; extern const char *const aa_profile_mode_names[]; #define APPARMOR_MODE_NAMES_MAX_INDEX 4 @@ -74,12 +75,14 @@ enum profile_mode { /* struct aa_policydb - match engine for a policy + * count: refcount for the pdb * dfa: dfa pattern match * perms: table of permissions * strs: table of strings, index by x * start: set of start states for the different classes of data */ struct aa_policydb { + struct kref count; struct aa_dfa *dfa; struct { struct aa_perms *perms; @@ -89,13 +92,36 @@ struct aa_policydb { aa_state_t start[AA_CLASS_LAST + 1]; }; -static inline void aa_destroy_policydb(struct aa_policydb *policy) +extern struct aa_policydb *nullpdb; + +struct aa_policydb *aa_alloc_pdb(gfp_t gfp); +void aa_pdb_free_kref(struct kref *kref); + +/** + * aa_get_pdb - increment refcount on @pdb + * @pdb: policydb (MAYBE NULL) + * + * Returns: pointer to @pdb if @pdb is NULL will return NULL + * Requires: @pdb must be held with valid refcount when called + */ +static inline struct aa_policydb *aa_get_pdb(struct aa_policydb *pdb) { - aa_put_dfa(policy->dfa); - if (policy->perms) - kvfree(policy->perms); - aa_free_str_table(&policy->trans); + if (pdb) + kref_get(&(pdb->count)); + + return pdb; +} +/** + * aa_put_pdb - put a pdb refcount + * @pdb: pdb to put refcount (MAYBE NULL) + * + * Requires: if @pdb != NULL that a valid refcount be held + */ +static inline void aa_put_pdb(struct aa_policydb *pdb) +{ + if (pdb) + kref_put(&pdb->count, aa_pdb_free_kref); } static inline struct aa_perms *aa_lookup_perms(struct aa_policydb *policy, @@ -139,8 +165,8 @@ struct aa_ruleset { int size; /* TODO: merge policy and file */ - struct aa_policydb policy; - struct aa_policydb file; + struct aa_policydb *policy; + struct aa_policydb *file; struct aa_caps caps; struct aa_rlimit rlimits; @@ -159,7 +185,7 @@ struct aa_ruleset { */ struct aa_attachment { const char *xmatch_str; - struct aa_policydb xmatch; + struct aa_policydb *xmatch; unsigned int xmatch_len; int xattr_count; char **xattrs; @@ -227,10 +253,6 @@ extern enum profile_mode aa_g_profile_mode; #define profiles_ns(P) ((P)->ns) #define name_is_shared(A, B) ((A)->hname && (A)->hname == (B)->hname) -void aa_add_profile(struct aa_policy *common, struct aa_profile *profile); - - -void aa_free_proxy_kref(struct kref *kref); struct aa_ruleset *aa_alloc_ruleset(gfp_t gfp); struct aa_profile *aa_alloc_profile(const char *name, struct aa_proxy *proxy, gfp_t gfp); @@ -239,14 +261,12 @@ struct aa_profile *aa_alloc_null(struct aa_profile *parent, const char *name, struct aa_profile *aa_new_learning_profile(struct aa_profile *parent, bool hat, const char *base, gfp_t gfp); void aa_free_profile(struct aa_profile *profile); -void aa_free_profile_kref(struct kref *kref); struct aa_profile *aa_find_child(struct aa_profile *parent, const char *name); struct aa_profile *aa_lookupn_profile(struct aa_ns *ns, const char *hname, size_t n); struct aa_profile *aa_lookup_profile(struct aa_ns *ns, const char *name); struct aa_profile *aa_fqlookupn_profile(struct aa_label *base, const char *fqname, size_t n); -struct aa_profile *aa_match_profile(struct aa_ns *ns, const char *name); ssize_t aa_replace_profiles(struct aa_ns *view, struct aa_label *label, u32 mask, struct aa_loaddata *udata); @@ -254,9 +274,6 @@ ssize_t aa_remove_profiles(struct aa_ns *view, struct aa_label *label, char *name, size_t size); void __aa_profile_list_release(struct list_head *head); -#define PROF_ADD 1 -#define PROF_REPLACE 0 - #define profile_unconfined(X) ((X)->mode == APPARMOR_UNCONFINED) /** @@ -276,10 +293,10 @@ static inline aa_state_t RULE_MEDIATES(struct aa_ruleset *rules, unsigned char class) { if (class <= AA_CLASS_LAST) - return rules->policy.start[class]; + return rules->policy->start[class]; else - return aa_dfa_match_len(rules->policy.dfa, - rules->policy.start[0], &class, 1); + return aa_dfa_match_len(rules->policy->dfa, + rules->policy->start[0], &class, 1); } static inline aa_state_t RULE_MEDIATES_AF(struct aa_ruleset *rules, u16 AF) @@ -289,7 +306,7 @@ static inline aa_state_t RULE_MEDIATES_AF(struct aa_ruleset *rules, u16 AF) if (!state) return DFA_NOMATCH; - return aa_dfa_match_len(rules->policy.dfa, state, (char *) &be_af, 2); + return aa_dfa_match_len(rules->policy->dfa, state, (char *) &be_af, 2); } static inline aa_state_t ANY_RULE_MEDIATES(struct list_head *head, @@ -370,9 +387,12 @@ static inline int AUDIT_MODE(struct aa_profile *profile) return profile->audit; } -bool aa_policy_view_capable(struct aa_label *label, struct aa_ns *ns); -bool aa_policy_admin_capable(struct aa_label *label, struct aa_ns *ns); -int aa_may_manage_policy(struct aa_label *label, struct aa_ns *ns, +bool aa_policy_view_capable(const struct cred *subj_cred, + struct aa_label *label, struct aa_ns *ns); +bool aa_policy_admin_capable(const struct cred *subj_cred, + struct aa_label *label, struct aa_ns *ns); +int aa_may_manage_policy(const struct cred *subj_cred, + struct aa_label *label, struct aa_ns *ns, u32 mask); bool aa_current_policy_view_capable(struct aa_ns *ns); bool aa_current_policy_admin_capable(struct aa_ns *ns); |