diff options
Diffstat (limited to 'security/selinux/ss/services.c')
| -rw-r--r-- | security/selinux/ss/services.c | 1078 |
1 files changed, 611 insertions, 467 deletions
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c index 8900ea5cbabf..3698352213d7 100644 --- a/security/selinux/ss/services.c +++ b/security/selinux/ss/services.c @@ -80,53 +80,32 @@ char *selinux_policycap_names[__POLICYDB_CAPABILITY_MAX] = { "nnp_nosuid_transition" }; -int selinux_policycap_netpeer; -int selinux_policycap_openperm; -int selinux_policycap_extsockclass; -int selinux_policycap_alwaysnetwork; -int selinux_policycap_cgroupseclabel; -int selinux_policycap_nnp_nosuid_transition; +static struct selinux_ss selinux_ss; -static DEFINE_RWLOCK(policy_rwlock); - -static struct sidtab sidtab; -struct policydb policydb; -int ss_initialized; - -/* - * The largest sequence number that has been used when - * providing an access decision to the access vector cache. - * The sequence number only changes when a policy change - * occurs. - */ -static u32 latest_granting; +void selinux_ss_init(struct selinux_ss **ss) +{ + rwlock_init(&selinux_ss.policy_rwlock); + mutex_init(&selinux_ss.status_lock); + *ss = &selinux_ss; +} /* Forward declaration. */ -static int context_struct_to_string(struct context *context, char **scontext, +static int context_struct_to_string(struct policydb *policydb, + struct context *context, + char **scontext, u32 *scontext_len); -static void context_struct_compute_av(struct context *scontext, - struct context *tcontext, - u16 tclass, - struct av_decision *avd, - struct extended_perms *xperms); - -struct selinux_mapping { - u16 value; /* policy value */ - unsigned num_perms; - u32 perms[sizeof(u32) * 8]; -}; - -static struct selinux_mapping *current_mapping; -static u16 current_mapping_size; +static void context_struct_compute_av(struct policydb *policydb, + struct context *scontext, + struct context *tcontext, + u16 tclass, + struct av_decision *avd, + struct extended_perms *xperms); static int selinux_set_mapping(struct policydb *pol, struct security_class_mapping *map, - struct selinux_mapping **out_map_p, - u16 *out_map_size) + struct selinux_map *out_map) { - struct selinux_mapping *out_map = NULL; - size_t size = sizeof(struct selinux_mapping); u16 i, j; unsigned k; bool print_unknown_handle = false; @@ -139,15 +118,15 @@ static int selinux_set_mapping(struct policydb *pol, i++; /* Allocate space for the class records, plus one for class zero */ - out_map = kcalloc(++i, size, GFP_ATOMIC); - if (!out_map) + out_map->mapping = kcalloc(++i, sizeof(*out_map->mapping), GFP_ATOMIC); + if (!out_map->mapping) return -ENOMEM; /* Store the raw class and permission values */ j = 0; while (map[j].name) { struct security_class_mapping *p_in = map + (j++); - struct selinux_mapping *p_out = out_map + j; + struct selinux_mapping *p_out = out_map->mapping + j; /* An empty class string skips ahead */ if (!strcmp(p_in->name, "")) { @@ -194,11 +173,11 @@ static int selinux_set_mapping(struct policydb *pol, printk(KERN_INFO "SELinux: the above unknown classes and permissions will be %s\n", pol->allow_unknown ? "allowed" : "denied"); - *out_map_p = out_map; - *out_map_size = i; + out_map->size = i; return 0; err: - kfree(out_map); + kfree(out_map->mapping); + out_map->mapping = NULL; return -EINVAL; } @@ -206,10 +185,10 @@ err: * Get real, policy values from mapped values */ -static u16 unmap_class(u16 tclass) +static u16 unmap_class(struct selinux_map *map, u16 tclass) { - if (tclass < current_mapping_size) - return current_mapping[tclass].value; + if (tclass < map->size) + return map->mapping[tclass].value; return tclass; } @@ -217,42 +196,44 @@ static u16 unmap_class(u16 tclass) /* * Get kernel value for class from its policy value */ -static u16 map_class(u16 pol_value) +static u16 map_class(struct selinux_map *map, u16 pol_value) { u16 i; - for (i = 1; i < current_mapping_size; i++) { - if (current_mapping[i].value == pol_value) + for (i = 1; i < map->size; i++) { + if (map->mapping[i].value == pol_value) return i; } return SECCLASS_NULL; } -static void map_decision(u16 tclass, struct av_decision *avd, +static void map_decision(struct selinux_map *map, + u16 tclass, struct av_decision *avd, int allow_unknown) { - if (tclass < current_mapping_size) { - unsigned i, n = current_mapping[tclass].num_perms; + if (tclass < map->size) { + struct selinux_mapping *mapping = &map->mapping[tclass]; + unsigned int i, n = mapping->num_perms; u32 result; for (i = 0, result = 0; i < n; i++) { - if (avd->allowed & current_mapping[tclass].perms[i]) + if (avd->allowed & mapping->perms[i]) result |= 1<<i; - if (allow_unknown && !current_mapping[tclass].perms[i]) + if (allow_unknown && !mapping->perms[i]) result |= 1<<i; } avd->allowed = result; for (i = 0, result = 0; i < n; i++) - if (avd->auditallow & current_mapping[tclass].perms[i]) + if (avd->auditallow & mapping->perms[i]) result |= 1<<i; avd->auditallow = result; for (i = 0, result = 0; i < n; i++) { - if (avd->auditdeny & current_mapping[tclass].perms[i]) + if (avd->auditdeny & mapping->perms[i]) result |= 1<<i; - if (!allow_unknown && !current_mapping[tclass].perms[i]) + if (!allow_unknown && !mapping->perms[i]) result |= 1<<i; } /* @@ -266,9 +247,11 @@ static void map_decision(u16 tclass, struct av_decision *avd, } } -int security_mls_enabled(void) +int security_mls_enabled(struct selinux_state *state) { - return policydb.mls_enabled; + struct policydb *p = &state->ss->policydb; + + return p->mls_enabled; } /* @@ -282,7 +265,8 @@ int security_mls_enabled(void) * of the process performing the transition. All other callers of * constraint_expr_eval should pass in NULL for xcontext. */ -static int constraint_expr_eval(struct context *scontext, +static int constraint_expr_eval(struct policydb *policydb, + struct context *scontext, struct context *tcontext, struct context *xcontext, struct constraint_expr *cexpr) @@ -326,8 +310,8 @@ static int constraint_expr_eval(struct context *scontext, case CEXPR_ROLE: val1 = scontext->role; val2 = tcontext->role; - r1 = policydb.role_val_to_struct[val1 - 1]; - r2 = policydb.role_val_to_struct[val2 - 1]; + r1 = policydb->role_val_to_struct[val1 - 1]; + r2 = policydb->role_val_to_struct[val2 - 1]; switch (e->op) { case CEXPR_DOM: s[++sp] = ebitmap_get_bit(&r1->dominates, @@ -472,7 +456,8 @@ static int dump_masked_av_helper(void *k, void *d, void *args) return 0; } -static void security_dump_masked_av(struct context *scontext, +static void security_dump_masked_av(struct policydb *policydb, + struct context *scontext, struct context *tcontext, u16 tclass, u32 permissions, @@ -492,8 +477,8 @@ static void security_dump_masked_av(struct context *scontext, if (!permissions) return; - tclass_name = sym_name(&policydb, SYM_CLASSES, tclass - 1); - tclass_dat = policydb.class_val_to_struct[tclass - 1]; + tclass_name = sym_name(policydb, SYM_CLASSES, tclass - 1); + tclass_dat = policydb->class_val_to_struct[tclass - 1]; common_dat = tclass_dat->comdatum; /* init permission_names */ @@ -507,11 +492,11 @@ static void security_dump_masked_av(struct context *scontext, goto out; /* get scontext/tcontext in text form */ - if (context_struct_to_string(scontext, + if (context_struct_to_string(policydb, scontext, &scontext_name, &length) < 0) goto out; - if (context_struct_to_string(tcontext, + if (context_struct_to_string(policydb, tcontext, &tcontext_name, &length) < 0) goto out; @@ -550,7 +535,8 @@ out: * security_boundary_permission - drops violated permissions * on boundary constraint. */ -static void type_attribute_bounds_av(struct context *scontext, +static void type_attribute_bounds_av(struct policydb *policydb, + struct context *scontext, struct context *tcontext, u16 tclass, struct av_decision *avd) @@ -562,14 +548,14 @@ static void type_attribute_bounds_av(struct context *scontext, struct type_datum *target; u32 masked = 0; - source = flex_array_get_ptr(policydb.type_val_to_struct_array, + source = flex_array_get_ptr(policydb->type_val_to_struct_array, scontext->type - 1); BUG_ON(!source); if (!source->bounds) return; - target = flex_array_get_ptr(policydb.type_val_to_struct_array, + target = flex_array_get_ptr(policydb->type_val_to_struct_array, tcontext->type - 1); BUG_ON(!target); @@ -584,7 +570,7 @@ static void type_attribute_bounds_av(struct context *scontext, tcontextp = &lo_tcontext; } - context_struct_compute_av(&lo_scontext, + context_struct_compute_av(policydb, &lo_scontext, tcontextp, tclass, &lo_avd, @@ -599,7 +585,7 @@ static void type_attribute_bounds_av(struct context *scontext, avd->allowed &= ~masked; /* audit masked permissions */ - security_dump_masked_av(scontext, tcontext, + security_dump_masked_av(policydb, scontext, tcontext, tclass, masked, "bounds"); } @@ -632,11 +618,12 @@ void services_compute_xperms_drivers( * Compute access vectors and extended permissions based on a context * structure pair for the permissions in a particular class. */ -static void context_struct_compute_av(struct context *scontext, - struct context *tcontext, - u16 tclass, - struct av_decision *avd, - struct extended_perms *xperms) +static void context_struct_compute_av(struct policydb *policydb, + struct context *scontext, + struct context *tcontext, + u16 tclass, + struct av_decision *avd, + struct extended_perms *xperms) { struct constraint_node *constraint; struct role_allow *ra; @@ -655,13 +642,13 @@ static void context_struct_compute_av(struct context *scontext, xperms->len = 0; } - if (unlikely(!tclass || tclass > policydb.p_classes.nprim)) { + if (unlikely(!tclass || tclass > policydb->p_classes.nprim)) { if (printk_ratelimit()) printk(KERN_WARNING "SELinux: Invalid class %hu\n", tclass); return; } - tclass_datum = policydb.class_val_to_struct[tclass - 1]; + tclass_datum = policydb->class_val_to_struct[tclass - 1]; /* * If a specific type enforcement rule was defined for @@ -669,15 +656,18 @@ static void context_struct_compute_av(struct context *scontext, */ avkey.target_class = tclass; avkey.specified = AVTAB_AV | AVTAB_XPERMS; - sattr = flex_array_get(policydb.type_attr_map_array, scontext->type - 1); + sattr = flex_array_get(policydb->type_attr_map_array, + scontext->type - 1); BUG_ON(!sattr); - tattr = flex_array_get(policydb.type_attr_map_array, tcontext->type - 1); + tattr = flex_array_get(policydb->type_attr_map_array, + tcontext->type - 1); BUG_ON(!tattr); ebitmap_for_each_positive_bit(sattr, snode, i) { ebitmap_for_each_positive_bit(tattr, tnode, j) { avkey.source_type = i + 1; avkey.target_type = j + 1; - for (node = avtab_search_node(&policydb.te_avtab, &avkey); + for (node = avtab_search_node(&policydb->te_avtab, + &avkey); node; node = avtab_search_node_next(node, avkey.specified)) { if (node->key.specified == AVTAB_ALLOWED) @@ -691,7 +681,7 @@ static void context_struct_compute_av(struct context *scontext, } /* Check conditional av table for additional permissions */ - cond_compute_av(&policydb.te_cond_avtab, &avkey, + cond_compute_av(&policydb->te_cond_avtab, &avkey, avd, xperms); } @@ -704,7 +694,7 @@ static void context_struct_compute_av(struct context *scontext, constraint = tclass_datum->constraints; while (constraint) { if ((constraint->permissions & (avd->allowed)) && - !constraint_expr_eval(scontext, tcontext, NULL, + !constraint_expr_eval(policydb, scontext, tcontext, NULL, constraint->expr)) { avd->allowed &= ~(constraint->permissions); } @@ -716,16 +706,16 @@ static void context_struct_compute_av(struct context *scontext, * role is changing, then check the (current_role, new_role) * pair. */ - if (tclass == policydb.process_class && - (avd->allowed & policydb.process_trans_perms) && + if (tclass == policydb->process_class && + (avd->allowed & policydb->process_trans_perms) && scontext->role != tcontext->role) { - for (ra = policydb.role_allow; ra; ra = ra->next) { + for (ra = policydb->role_allow; ra; ra = ra->next) { if (scontext->role == ra->role && tcontext->role == ra->new_role) break; } if (!ra) - avd->allowed &= ~policydb.process_trans_perms; + avd->allowed &= ~policydb->process_trans_perms; } /* @@ -733,41 +723,46 @@ static void context_struct_compute_av(struct context *scontext, * constraint, lazy checks have to mask any violated * permission and notice it to userspace via audit. */ - type_attribute_bounds_av(scontext, tcontext, + type_attribute_bounds_av(policydb, scontext, tcontext, tclass, avd); } -static int security_validtrans_handle_fail(struct context *ocontext, +static int security_validtrans_handle_fail(struct selinux_state *state, + struct context *ocontext, struct context *ncontext, struct context *tcontext, u16 tclass) { + struct policydb *p = &state->ss->policydb; char *o = NULL, *n = NULL, *t = NULL; u32 olen, nlen, tlen; - if (context_struct_to_string(ocontext, &o, &olen)) + if (context_struct_to_string(p, ocontext, &o, &olen)) goto out; - if (context_struct_to_string(ncontext, &n, &nlen)) + if (context_struct_to_string(p, ncontext, &n, &nlen)) goto out; - if (context_struct_to_string(tcontext, &t, &tlen)) + if (context_struct_to_string(p, tcontext, &t, &tlen)) goto out; audit_log(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR, "op=security_validate_transition seresult=denied" " oldcontext=%s newcontext=%s taskcontext=%s tclass=%s", - o, n, t, sym_name(&policydb, SYM_CLASSES, tclass-1)); + o, n, t, sym_name(p, SYM_CLASSES, tclass-1)); out: kfree(o); kfree(n); kfree(t); - if (!selinux_enforcing) + if (!is_enforcing(state)) return 0; return -EPERM; } -static int security_compute_validatetrans(u32 oldsid, u32 newsid, u32 tasksid, +static int security_compute_validatetrans(struct selinux_state *state, + u32 oldsid, u32 newsid, u32 tasksid, u16 orig_tclass, bool user) { + struct policydb *policydb; + struct sidtab *sidtab; struct context *ocontext; struct context *ncontext; struct context *tcontext; @@ -776,23 +771,27 @@ static int security_compute_validatetrans(u32 oldsid, u32 newsid, u32 tasksid, u16 tclass; int rc = 0; - if (!ss_initialized) + + if (!state->initialized) return 0; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; if (!user) - tclass = unmap_class(orig_tclass); + tclass = unmap_class(&state->ss->map, orig_tclass); else tclass = orig_tclass; - if (!tclass || tclass > policydb.p_classes.nprim) { + if (!tclass || tclass > policydb->p_classes.nprim) { rc = -EINVAL; goto out; } - tclass_datum = policydb.class_val_to_struct[tclass - 1]; + tclass_datum = policydb->class_val_to_struct[tclass - 1]; - ocontext = sidtab_search(&sidtab, oldsid); + ocontext = sidtab_search(sidtab, oldsid); if (!ocontext) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, oldsid); @@ -800,7 +799,7 @@ static int security_compute_validatetrans(u32 oldsid, u32 newsid, u32 tasksid, goto out; } - ncontext = sidtab_search(&sidtab, newsid); + ncontext = sidtab_search(sidtab, newsid); if (!ncontext) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, newsid); @@ -808,7 +807,7 @@ static int security_compute_validatetrans(u32 oldsid, u32 newsid, u32 tasksid, goto out; } - tcontext = sidtab_search(&sidtab, tasksid); + tcontext = sidtab_search(sidtab, tasksid); if (!tcontext) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, tasksid); @@ -818,12 +817,13 @@ static int security_compute_validatetrans(u32 oldsid, u32 newsid, u32 tasksid, constraint = tclass_datum->validatetrans; while (constraint) { - if (!constraint_expr_eval(ocontext, ncontext, tcontext, - constraint->expr)) { + if (!constraint_expr_eval(policydb, ocontext, ncontext, + tcontext, constraint->expr)) { if (user) rc = -EPERM; else - rc = security_validtrans_handle_fail(ocontext, + rc = security_validtrans_handle_fail(state, + ocontext, ncontext, tcontext, tclass); @@ -833,22 +833,24 @@ static int security_compute_validatetrans(u32 oldsid, u32 newsid, u32 tasksid, } out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; } -int security_validate_transition_user(u32 oldsid, u32 newsid, u32 tasksid, - u16 tclass) +int security_validate_transition_user(struct selinux_state *state, + u32 oldsid, u32 newsid, u32 tasksid, + u16 tclass) { - return security_compute_validatetrans(oldsid, newsid, tasksid, - tclass, true); + return security_compute_validatetrans(state, oldsid, newsid, tasksid, + tclass, true); } -int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, +int security_validate_transition(struct selinux_state *state, + u32 oldsid, u32 newsid, u32 tasksid, u16 orig_tclass) { - return security_compute_validatetrans(oldsid, newsid, tasksid, - orig_tclass, false); + return security_compute_validatetrans(state, oldsid, newsid, tasksid, + orig_tclass, false); } /* @@ -860,20 +862,26 @@ int security_validate_transition(u32 oldsid, u32 newsid, u32 tasksid, * @oldsid : current security identifier * @newsid : destinated security identifier */ -int security_bounded_transition(u32 old_sid, u32 new_sid) +int security_bounded_transition(struct selinux_state *state, + u32 old_sid, u32 new_sid) { + struct policydb *policydb; + struct sidtab *sidtab; struct context *old_context, *new_context; struct type_datum *type; int index; int rc; - if (!ss_initialized) + if (!state->initialized) return 0; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; rc = -EINVAL; - old_context = sidtab_search(&sidtab, old_sid); + old_context = sidtab_search(sidtab, old_sid); if (!old_context) { printk(KERN_ERR "SELinux: %s: unrecognized SID %u\n", __func__, old_sid); @@ -881,7 +889,7 @@ int security_bounded_transition(u32 old_sid, u32 new_sid) } rc = -EINVAL; - new_context = sidtab_search(&sidtab, new_sid); + new_context = sidtab_search(sidtab, new_sid); if (!new_context) { printk(KERN_ERR "SELinux: %s: unrecognized SID %u\n", __func__, new_sid); @@ -895,7 +903,7 @@ int security_bounded_transition(u32 old_sid, u32 new_sid) index = new_context->type; while (true) { - type = flex_array_get_ptr(policydb.type_val_to_struct_array, + type = flex_array_get_ptr(policydb->type_val_to_struct_array, index - 1); BUG_ON(!type); @@ -917,9 +925,9 @@ int security_bounded_transition(u32 old_sid, u32 new_sid) char *new_name = NULL; u32 length; - if (!context_struct_to_string(old_context, + if (!context_struct_to_string(policydb, old_context, &old_name, &length) && - !context_struct_to_string(new_context, + !context_struct_to_string(policydb, new_context, &new_name, &length)) { audit_log(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR, @@ -932,17 +940,17 @@ int security_bounded_transition(u32 old_sid, u32 new_sid) kfree(old_name); } out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; } -static void avd_init(struct av_decision *avd) +static void avd_init(struct selinux_state *state, struct av_decision *avd) { avd->allowed = 0; avd->auditallow = 0; avd->auditdeny = 0xffffffff; - avd->seqno = latest_granting; + avd->seqno = state->ss->latest_granting; avd->flags = 0; } @@ -1000,12 +1008,15 @@ void services_compute_xperms_decision(struct extended_perms_decision *xpermd, } } -void security_compute_xperms_decision(u32 ssid, - u32 tsid, - u16 orig_tclass, - u8 driver, - struct extended_perms_decision *xpermd) +void security_compute_xperms_decision(struct selinux_state *state, + u32 ssid, + u32 tsid, + u16 orig_tclass, + u8 driver, + struct extended_perms_decision *xpermd) { + struct policydb *policydb; + struct sidtab *sidtab; u16 tclass; struct context *scontext, *tcontext; struct avtab_key avkey; @@ -1020,60 +1031,64 @@ void security_compute_xperms_decision(u32 ssid, memset(xpermd->auditallow->p, 0, sizeof(xpermd->auditallow->p)); memset(xpermd->dontaudit->p, 0, sizeof(xpermd->dontaudit->p)); - read_lock(&policy_rwlock); - if (!ss_initialized) + read_lock(&state->ss->policy_rwlock); + if (!state->initialized) goto allow; - scontext = sidtab_search(&sidtab, ssid); + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; + + scontext = sidtab_search(sidtab, ssid); if (!scontext) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, ssid); goto out; } - tcontext = sidtab_search(&sidtab, tsid); + tcontext = sidtab_search(sidtab, tsid); if (!tcontext) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, tsid); goto out; } - tclass = unmap_class(orig_tclass); + tclass = unmap_class(&state->ss->map, orig_tclass); if (unlikely(orig_tclass && !tclass)) { - if (policydb.allow_unknown) + if (policydb->allow_unknown) goto allow; goto out; } - if (unlikely(!tclass || tclass > policydb.p_classes.nprim)) { + if (unlikely(!tclass || tclass > policydb->p_classes.nprim)) { pr_warn_ratelimited("SELinux: Invalid class %hu\n", tclass); goto out; } avkey.target_class = tclass; avkey.specified = AVTAB_XPERMS; - sattr = flex_array_get(policydb.type_attr_map_array, + sattr = flex_array_get(policydb->type_attr_map_array, scontext->type - 1); BUG_ON(!sattr); - tattr = flex_array_get(policydb.type_attr_map_array, + tattr = flex_array_get(policydb->type_attr_map_array, tcontext->type - 1); BUG_ON(!tattr); ebitmap_for_each_positive_bit(sattr, snode, i) { ebitmap_for_each_positive_bit(tattr, tnode, j) { avkey.source_type = i + 1; avkey.target_type = j + 1; - for (node = avtab_search_node(&policydb.te_avtab, &avkey); + for (node = avtab_search_node(&policydb->te_avtab, + &avkey); node; node = avtab_search_node_next(node, avkey.specified)) services_compute_xperms_decision(xpermd, node); - cond_compute_xperms(&policydb.te_cond_avtab, + cond_compute_xperms(&policydb->te_cond_avtab, &avkey, xpermd); } } out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return; allow: memset(xpermd->allowed->p, 0xff, sizeof(xpermd->allowed->p)); @@ -1091,22 +1106,28 @@ allow: * Compute a set of access vector decisions based on the * SID pair (@ssid, @tsid) for the permissions in @tclass. */ -void security_compute_av(u32 ssid, +void security_compute_av(struct selinux_state *state, + u32 ssid, u32 tsid, u16 orig_tclass, struct av_decision *avd, struct extended_perms *xperms) { + struct policydb *policydb; + struct sidtab *sidtab; u16 tclass; struct context *scontext = NULL, *tcontext = NULL; - read_lock(&policy_rwlock); - avd_init(avd); + read_lock(&state->ss->policy_rwlock); + avd_init(state, avd); xperms->len = 0; - if (!ss_initialized) + if (!state->initialized) goto allow; - scontext = sidtab_search(&sidtab, ssid); + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; + + scontext = sidtab_search(sidtab, ssid); if (!scontext) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, ssid); @@ -1114,45 +1135,53 @@ void security_compute_av(u32 ssid, } /* permissive domain? */ - if (ebitmap_get_bit(&policydb.permissive_map, scontext->type)) + if (ebitmap_get_bit(&policydb->permissive_map, scontext->type)) avd->flags |= AVD_FLAGS_PERMISSIVE; - tcontext = sidtab_search(&sidtab, tsid); + tcontext = sidtab_search(sidtab, tsid); if (!tcontext) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, tsid); goto out; } - tclass = unmap_class(orig_tclass); + tclass = unmap_class(&state->ss->map, orig_tclass); if (unlikely(orig_tclass && !tclass)) { - if (policydb.allow_unknown) + if (policydb->allow_unknown) goto allow; goto out; } - context_struct_compute_av(scontext, tcontext, tclass, avd, xperms); - map_decision(orig_tclass, avd, policydb.allow_unknown); + context_struct_compute_av(policydb, scontext, tcontext, tclass, avd, + xperms); + map_decision(&state->ss->map, orig_tclass, avd, + policydb->allow_unknown); out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return; allow: avd->allowed = 0xffffffff; goto out; } -void security_compute_av_user(u32 ssid, +void security_compute_av_user(struct selinux_state *state, + u32 ssid, u32 tsid, u16 tclass, struct av_decision *avd) { + struct policydb *policydb; + struct sidtab *sidtab; struct context *scontext = NULL, *tcontext = NULL; - read_lock(&policy_rwlock); - avd_init(avd); - if (!ss_initialized) + read_lock(&state->ss->policy_rwlock); + avd_init(state, avd); + if (!state->initialized) goto allow; - scontext = sidtab_search(&sidtab, ssid); + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; + + scontext = sidtab_search(sidtab, ssid); if (!scontext) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, ssid); @@ -1160,10 +1189,10 @@ void security_compute_av_user(u32 ssid, } /* permissive domain? */ - if (ebitmap_get_bit(&policydb.permissive_map, scontext->type)) + if (ebitmap_get_bit(&policydb->permissive_map, scontext->type)) avd->flags |= AVD_FLAGS_PERMISSIVE; - tcontext = sidtab_search(&sidtab, tsid); + tcontext = sidtab_search(sidtab, tsid); if (!tcontext) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, tsid); @@ -1171,14 +1200,15 @@ void security_compute_av_user(u32 ssid, } if (unlikely(!tclass)) { - if (policydb.allow_unknown) + if (policydb->allow_unknown) goto allow; goto out; } - context_struct_compute_av(scontext, tcontext, tclass, avd, NULL); + context_struct_compute_av(policydb, scontext, tcontext, tclass, avd, + NULL); out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return; allow: avd->allowed = 0xffffffff; @@ -1192,7 +1222,9 @@ allow: * to point to this string and set `*scontext_len' to * the length of the string. */ -static int context_struct_to_string(struct context *context, char **scontext, u32 *scontext_len) +static int context_struct_to_string(struct policydb *p, + struct context *context, + char **scontext, u32 *scontext_len) { char *scontextp; @@ -1211,10 +1243,10 @@ static int context_struct_to_string(struct context *context, char **scontext, u3 } /* Compute the size of the context. */ - *scontext_len += strlen(sym_name(&policydb, SYM_USERS, context->user - 1)) + 1; - *scontext_len += strlen(sym_name(&policydb, SYM_ROLES, context->role - 1)) + 1; - *scontext_len += strlen(sym_name(&policydb, SYM_TYPES, context->type - 1)) + 1; - *scontext_len += mls_compute_context_len(context); + *scontext_len += strlen(sym_name(p, SYM_USERS, context->user - 1)) + 1; + *scontext_len += strlen(sym_name(p, SYM_ROLES, context->role - 1)) + 1; + *scontext_len += strlen(sym_name(p, SYM_TYPES, context->type - 1)) + 1; + *scontext_len += mls_compute_context_len(p, context); if (!scontext) return 0; @@ -1229,11 +1261,11 @@ static int context_struct_to_string(struct context *context, char **scontext, u3 * Copy the user name, role name and type name into the context. */ scontextp += sprintf(scontextp, "%s:%s:%s", - sym_name(&policydb, SYM_USERS, context->user - 1), - sym_name(&policydb, SYM_ROLES, context->role - 1), - sym_name(&policydb, SYM_TYPES, context->type - 1)); + sym_name(p, SYM_USERS, context->user - 1), + sym_name(p, SYM_ROLES, context->role - 1), + sym_name(p, SYM_TYPES, context->type - 1)); - mls_sid_to_context(context, &scontextp); + mls_sid_to_context(p, context, &scontextp); *scontextp = 0; @@ -1249,9 +1281,12 @@ const char *security_get_initial_sid_context(u32 sid) return initial_sid_to_string[sid]; } -static int security_sid_to_context_core(u32 sid, char **scontext, +static int security_sid_to_context_core(struct selinux_state *state, + u32 sid, char **scontext, u32 *scontext_len, int force) { + struct policydb *policydb; + struct sidtab *sidtab; struct context *context; int rc = 0; @@ -1259,7 +1294,7 @@ static int security_sid_to_context_core(u32 sid, char **scontext, *scontext = NULL; *scontext_len = 0; - if (!ss_initialized) { + if (!state->initialized) { if (sid <= SECINITSID_NUM) { char *scontextp; @@ -1280,20 +1315,23 @@ static int security_sid_to_context_core(u32 sid, char **scontext, rc = -EINVAL; goto out; } - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; if (force) - context = sidtab_search_force(&sidtab, sid); + context = sidtab_search_force(sidtab, sid); else - context = sidtab_search(&sidtab, sid); + context = sidtab_search(sidtab, sid); if (!context) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, sid); rc = -EINVAL; goto out_unlock; } - rc = context_struct_to_string(context, scontext, scontext_len); + rc = context_struct_to_string(policydb, context, scontext, + scontext_len); out_unlock: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); out: return rc; @@ -1309,14 +1347,18 @@ out: * into a dynamically allocated string of the correct size. Set @scontext * to point to this string and set @scontext_len to the length of the string. */ -int security_sid_to_context(u32 sid, char **scontext, u32 *scontext_len) +int security_sid_to_context(struct selinux_state *state, + u32 sid, char **scontext, u32 *scontext_len) { - return security_sid_to_context_core(sid, scontext, scontext_len, 0); + return security_sid_to_context_core(state, sid, scontext, + scontext_len, 0); } -int security_sid_to_context_force(u32 sid, char **scontext, u32 *scontext_len) +int security_sid_to_context_force(struct selinux_state *state, u32 sid, + char **scontext, u32 *scontext_len) { - return security_sid_to_context_core(sid, scontext, scontext_len, 1); + return security_sid_to_context_core(state, sid, scontext, + scontext_len, 1); } /* @@ -1404,10 +1446,13 @@ out: return rc; } -static int security_context_to_sid_core(const char *scontext, u32 scontext_len, +static int security_context_to_sid_core(struct selinux_state *state, + const char *scontext, u32 scontext_len, u32 *sid, u32 def_sid, gfp_t gfp_flags, int force) { + struct policydb *policydb; + struct sidtab *sidtab; char *scontext2, *str = NULL; struct context context; int rc = 0; @@ -1421,7 +1466,7 @@ static int security_context_to_sid_core(const char *scontext, u32 scontext_len, if (!scontext2) return -ENOMEM; - if (!ss_initialized) { + if (!state->initialized) { int i; for (i = 1; i < SECINITSID_NUM; i++) { @@ -1442,9 +1487,10 @@ static int security_context_to_sid_core(const char *scontext, u32 scontext_len, if (!str) goto out; } - - read_lock(&policy_rwlock); - rc = string_to_context_struct(&policydb, &sidtab, scontext2, + read_lock(&state->ss->policy_rwlock); + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; + rc = string_to_context_struct(policydb, sidtab, scontext2, scontext_len, &context, def_sid); if (rc == -EINVAL && force) { context.str = str; @@ -1452,10 +1498,10 @@ static int security_context_to_sid_core(const char *scontext, u32 scontext_len, str = NULL; } else if (rc) goto out_unlock; - rc = sidtab_context_to_sid(&sidtab, &context, sid); + rc = sidtab_context_to_sid(sidtab, &context, sid); context_destroy(&context); out_unlock: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); out: kfree(scontext2); kfree(str); @@ -1474,16 +1520,19 @@ out: * Returns -%EINVAL if the context is invalid, -%ENOMEM if insufficient * memory is available, or 0 on success. */ -int security_context_to_sid(const char *scontext, u32 scontext_len, u32 *sid, +int security_context_to_sid(struct selinux_state *state, + const char *scontext, u32 scontext_len, u32 *sid, gfp_t gfp) { - return security_context_to_sid_core(scontext, scontext_len, + return security_context_to_sid_core(state, scontext, scontext_len, sid, SECSID_NULL, gfp, 0); } -int security_context_str_to_sid(const char *scontext, u32 *sid, gfp_t gfp) +int security_context_str_to_sid(struct selinux_state *state, + const char *scontext, u32 *sid, gfp_t gfp) { - return security_context_to_sid(scontext, strlen(scontext), sid, gfp); + return security_context_to_sid(state, scontext, strlen(scontext), + sid, gfp); } /** @@ -1504,51 +1553,56 @@ int security_context_str_to_sid(const char *scontext, u32 *sid, gfp_t gfp) * Returns -%EINVAL if the context is invalid, -%ENOMEM if insufficient * memory is available, or 0 on success. */ -int security_context_to_sid_default(const char *scontext, u32 scontext_len, +int security_context_to_sid_default(struct selinux_state *state, + const char *scontext, u32 scontext_len, u32 *sid, u32 def_sid, gfp_t gfp_flags) { - return security_context_to_sid_core(scontext, scontext_len, + return security_context_to_sid_core(state, scontext, scontext_len, sid, def_sid, gfp_flags, 1); } -int security_context_to_sid_force(const char *scontext, u32 scontext_len, +int security_context_to_sid_force(struct selinux_state *state, + const char *scontext, u32 scontext_len, u32 *sid) { - return security_context_to_sid_core(scontext, scontext_len, + return security_context_to_sid_core(state, scontext, scontext_len, sid, SECSID_NULL, GFP_KERNEL, 1); } static int compute_sid_handle_invalid_context( + struct selinux_state *state, struct context *scontext, struct context *tcontext, u16 tclass, struct context *newcontext) { + struct policydb *policydb = &state->ss->policydb; char *s = NULL, *t = NULL, *n = NULL; u32 slen, tlen, nlen; - if (context_struct_to_string(scontext, &s, &slen)) + if (context_struct_to_string(policydb, scontext, &s, &slen)) goto out; - if (context_struct_to_string(tcontext, &t, &tlen)) + if (context_struct_to_string(policydb, tcontext, &t, &tlen)) goto out; - if (context_struct_to_string(newcontext, &n, &nlen)) + if (context_struct_to_string(policydb, newcontext, &n, &nlen)) goto out; audit_log(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR, "op=security_compute_sid invalid_context=%s" " scontext=%s" " tcontext=%s" " tclass=%s", - n, s, t, sym_name(&policydb, SYM_CLASSES, tclass-1)); + n, s, t, sym_name(policydb, SYM_CLASSES, tclass-1)); out: kfree(s); kfree(t); kfree(n); - if (!selinux_enforcing) + if (!is_enforcing(state)) return 0; return -EACCES; } -static void filename_compute_type(struct policydb *p, struct context *newcontext, +static void filename_compute_type(struct policydb *policydb, + struct context *newcontext, u32 stype, u32 ttype, u16 tclass, const char *objname) { @@ -1560,7 +1614,7 @@ static void filename_compute_type(struct policydb *p, struct context *newcontext * like /dev or /var/run. This bitmap will quickly skip rule searches * if the ttype does not contain any rules. */ - if (!ebitmap_get_bit(&p->filename_trans_ttypes, ttype)) + if (!ebitmap_get_bit(&policydb->filename_trans_ttypes, ttype)) return; ft.stype = stype; @@ -1568,12 +1622,13 @@ static void filename_compute_type(struct policydb *p, struct context *newcontext ft.tclass = tclass; ft.name = objname; - otype = hashtab_search(p->filename_trans, &ft); + otype = hashtab_search(policydb->filename_trans, &ft); if (otype) newcontext->type = otype->otype; } -static int security_compute_sid(u32 ssid, +static int security_compute_sid(struct selinux_state *state, + u32 ssid, u32 tsid, u16 orig_tclass, u32 specified, @@ -1581,6 +1636,8 @@ static int security_compute_sid(u32 ssid, u32 *out_sid, bool kern) { + struct policydb *policydb; + struct sidtab *sidtab; struct class_datum *cladatum = NULL; struct context *scontext = NULL, *tcontext = NULL, newcontext; struct role_trans *roletr = NULL; @@ -1591,7 +1648,7 @@ static int security_compute_sid(u32 ssid, int rc = 0; bool sock; - if (!ss_initialized) { + if (!state->initialized) { switch (orig_tclass) { case SECCLASS_PROCESS: /* kernel value */ *out_sid = ssid; @@ -1605,24 +1662,28 @@ static int security_compute_sid(u32 ssid, context_init(&newcontext); - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); if (kern) { - tclass = unmap_class(orig_tclass); + tclass = unmap_class(&state->ss->map, orig_tclass); sock = security_is_socket_class(orig_tclass); } else { tclass = orig_tclass; - sock = security_is_socket_class(map_class(tclass)); + sock = security_is_socket_class(map_class(&state->ss->map, + tclass)); } - scontext = sidtab_search(&sidtab, ssid); + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; + + scontext = sidtab_search(sidtab, ssid); if (!scontext) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, ssid); rc = -EINVAL; goto out_unlock; } - tcontext = sidtab_search(&sidtab, tsid); + tcontext = sidtab_search(sidtab, tsid); if (!tcontext) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, tsid); @@ -1630,8 +1691,8 @@ static int security_compute_sid(u32 ssid, goto out_unlock; } - if (tclass && tclass <= policydb.p_classes.nprim) - cladatum = policydb.class_val_to_struct[tclass - 1]; + if (tclass && tclass <= policydb->p_classes.nprim) + cladatum = policydb->class_val_to_struct[tclass - 1]; /* Set the user identity. */ switch (specified) { @@ -1657,7 +1718,7 @@ static int security_compute_sid(u32 ssid, } else if (cladatum && cladatum->default_role == DEFAULT_TARGET) { newcontext.role = tcontext->role; } else { - if ((tclass == policydb.process_class) || (sock == true)) + if ((tclass == policydb->process_class) || (sock == true)) newcontext.role = scontext->role; else newcontext.role = OBJECT_R_VAL; @@ -1669,7 +1730,7 @@ static int security_compute_sid(u32 ssid, } else if (cladatum && cladatum->default_type == DEFAULT_TARGET) { newcontext.type = tcontext->type; } else { - if ((tclass == policydb.process_class) || (sock == true)) { + if ((tclass == policydb->process_class) || (sock == true)) { /* Use the type of process. */ newcontext.type = scontext->type; } else { @@ -1683,11 +1744,11 @@ static int security_compute_sid(u32 ssid, avkey.target_type = tcontext->type; avkey.target_class = tclass; avkey.specified = specified; - avdatum = avtab_search(&policydb.te_avtab, &avkey); + avdatum = avtab_search(&policydb->te_avtab, &avkey); /* If no permanent rule, also check for enabled conditional rules */ if (!avdatum) { - node = avtab_search_node(&policydb.te_cond_avtab, &avkey); + node = avtab_search_node(&policydb->te_cond_avtab, &avkey); for (; node; node = avtab_search_node_next(node, specified)) { if (node->key.specified & AVTAB_ENABLED) { avdatum = &node->datum; @@ -1703,13 +1764,14 @@ static int security_compute_sid(u32 ssid, /* if we have a objname this is a file trans check so check those rules */ if (objname) - filename_compute_type(&policydb, &newcontext, scontext->type, + filename_compute_type(policydb, &newcontext, scontext->type, tcontext->type, tclass, objname); /* Check for class-specific changes. */ if (specified & AVTAB_TRANSITION) { /* Look for a role transition rule. */ - for (roletr = policydb.role_tr; roletr; roletr = roletr->next) { + for (roletr = policydb->role_tr; roletr; + roletr = roletr->next) { if ((roletr->role == scontext->role) && (roletr->type == tcontext->type) && (roletr->tclass == tclass)) { @@ -1722,14 +1784,14 @@ static int security_compute_sid(u32 ssid, /* Set the MLS attributes. This is done last because it may allocate memory. */ - rc = mls_compute_sid(scontext, tcontext, tclass, specified, + rc = mls_compute_sid(policydb, scontext, tcontext, tclass, specified, &newcontext, sock); if (rc) goto out_unlock; /* Check the validity of the context. */ - if (!policydb_context_isvalid(&policydb, &newcontext)) { - rc = compute_sid_handle_invalid_context(scontext, + if (!policydb_context_isvalid(policydb, &newcontext)) { + rc = compute_sid_handle_invalid_context(state, scontext, tcontext, tclass, &newcontext); @@ -1737,9 +1799,9 @@ static int security_compute_sid(u32 ssid, goto out_unlock; } /* Obtain the sid for the context. */ - rc = sidtab_context_to_sid(&sidtab, &newcontext, out_sid); + rc = sidtab_context_to_sid(sidtab, &newcontext, out_sid); out_unlock: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); context_destroy(&newcontext); out: return rc; @@ -1758,17 +1820,21 @@ out: * if insufficient memory is available, or %0 if the new SID was * computed successfully. */ -int security_transition_sid(u32 ssid, u32 tsid, u16 tclass, +int security_transition_sid(struct selinux_state *state, + u32 ssid, u32 tsid, u16 tclass, const struct qstr *qstr, u32 *out_sid) { - return security_compute_sid(ssid, tsid, tclass, AVTAB_TRANSITION, + return security_compute_sid(state, ssid, tsid, tclass, + AVTAB_TRANSITION, qstr ? qstr->name : NULL, out_sid, true); } -int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass, +int security_transition_sid_user(struct selinux_state *state, + u32 ssid, u32 tsid, u16 tclass, const char *objname, u32 *out_sid) { - return security_compute_sid(ssid, tsid, tclass, AVTAB_TRANSITION, + return security_compute_sid(state, ssid, tsid, tclass, + AVTAB_TRANSITION, objname, out_sid, false); } @@ -1785,12 +1851,14 @@ int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass, * if insufficient memory is available, or %0 if the SID was * computed successfully. */ -int security_member_sid(u32 ssid, +int security_member_sid(struct selinux_state *state, + u32 ssid, u32 tsid, u16 tclass, u32 *out_sid) { - return security_compute_sid(ssid, tsid, tclass, AVTAB_MEMBER, NULL, + return security_compute_sid(state, ssid, tsid, tclass, + AVTAB_MEMBER, NULL, out_sid, false); } @@ -1807,12 +1875,14 @@ int security_member_sid(u32 ssid, * if insufficient memory is available, or %0 if the SID was * computed successfully. */ -int security_change_sid(u32 ssid, +int security_change_sid(struct selinux_state *state, + u32 ssid, u32 tsid, u16 tclass, u32 *out_sid) { - return security_compute_sid(ssid, tsid, tclass, AVTAB_CHANGE, NULL, + return security_compute_sid(state, + ssid, tsid, tclass, AVTAB_CHANGE, NULL, out_sid, false); } @@ -1829,15 +1899,18 @@ static int clone_sid(u32 sid, return 0; } -static inline int convert_context_handle_invalid_context(struct context *context) +static inline int convert_context_handle_invalid_context( + struct selinux_state *state, + struct context *context) { + struct policydb *policydb = &state->ss->policydb; char *s; u32 len; - if (selinux_enforcing) + if (is_enforcing(state)) return -EINVAL; - if (!context_struct_to_string(context, &s, &len)) { + if (!context_struct_to_string(policydb, context, &s, &len)) { printk(KERN_WARNING "SELinux: Context %s would be invalid if enforcing\n", s); kfree(s); } @@ -1845,6 +1918,7 @@ static inline int convert_context_handle_invalid_context(struct context *context } struct convert_context_args { + struct selinux_state *state; struct policydb *oldp; struct policydb *newp; }; @@ -1971,7 +2045,8 @@ static int convert_context(u32 key, /* Check the validity of the new context. */ if (!policydb_context_isvalid(args->newp, c)) { - rc = convert_context_handle_invalid_context(&oldc); + rc = convert_context_handle_invalid_context(args->state, + &oldc); if (rc) goto bad; } @@ -1983,7 +2058,7 @@ out: return rc; bad: /* Map old representation to string and save it. */ - rc = context_struct_to_string(&oldc, &s, &len); + rc = context_struct_to_string(args->oldp, &oldc, &s, &len); if (rc) return rc; context_destroy(&oldc); @@ -1996,39 +2071,29 @@ bad: goto out; } -static void security_load_policycaps(void) +static void security_load_policycaps(struct selinux_state *state) { + struct policydb *p = &state->ss->policydb; unsigned int i; struct ebitmap_node *node; - selinux_policycap_netpeer = ebitmap_get_bit(&policydb.policycaps, - POLICYDB_CAPABILITY_NETPEER); - selinux_policycap_openperm = ebitmap_get_bit(&policydb.policycaps, - POLICYDB_CAPABILITY_OPENPERM); - selinux_policycap_extsockclass = ebitmap_get_bit(&policydb.policycaps, - POLICYDB_CAPABILITY_EXTSOCKCLASS); - selinux_policycap_alwaysnetwork = ebitmap_get_bit(&policydb.policycaps, - POLICYDB_CAPABILITY_ALWAYSNETWORK); - selinux_policycap_cgroupseclabel = - ebitmap_get_bit(&policydb.policycaps, - POLICYDB_CAPABILITY_CGROUPSECLABEL); - selinux_policycap_nnp_nosuid_transition = - ebitmap_get_bit(&policydb.policycaps, - POLICYDB_CAPABILITY_NNP_NOSUID_TRANSITION); + for (i = 0; i < ARRAY_SIZE(state->policycap); i++) + state->policycap[i] = ebitmap_get_bit(&p->policycaps, i); for (i = 0; i < ARRAY_SIZE(selinux_policycap_names); i++) pr_info("SELinux: policy capability %s=%d\n", selinux_policycap_names[i], - ebitmap_get_bit(&policydb.policycaps, i)); + ebitmap_get_bit(&p->policycaps, i)); - ebitmap_for_each_positive_bit(&policydb.policycaps, node, i) { + ebitmap_for_each_positive_bit(&p->policycaps, node, i) { if (i >= ARRAY_SIZE(selinux_policycap_names)) pr_info("SELinux: unknown policy capability %u\n", i); } } -static int security_preserve_bools(struct policydb *p); +static int security_preserve_bools(struct selinux_state *state, + struct policydb *newpolicydb); /** * security_load_policy - Load a security policy configuration. @@ -2040,14 +2105,16 @@ static int security_preserve_bools(struct policydb *p); * This function will flush the access vector cache after * loading the new policy. */ -int security_load_policy(void *data, size_t len) +int security_load_policy(struct selinux_state *state, void *data, size_t len) { + struct policydb *policydb; + struct sidtab *sidtab; struct policydb *oldpolicydb, *newpolicydb; struct sidtab oldsidtab, newsidtab; - struct selinux_mapping *oldmap, *map = NULL; + struct selinux_mapping *oldmapping; + struct selinux_map newmap; struct convert_context_args args; u32 seqno; - u16 map_size; int rc = 0; struct policy_file file = { data, len }, *fp = &file; @@ -2058,53 +2125,42 @@ int security_load_policy(void *data, size_t len) } newpolicydb = oldpolicydb + 1; - if (!ss_initialized) { - avtab_cache_init(); - ebitmap_cache_init(); - hashtab_cache_init(); - rc = policydb_read(&policydb, fp); - if (rc) { - avtab_cache_destroy(); - ebitmap_cache_destroy(); - hashtab_cache_destroy(); + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; + + if (!state->initialized) { + rc = policydb_read(policydb, fp); + if (rc) goto out; - } - policydb.len = len; - rc = selinux_set_mapping(&policydb, secclass_map, - ¤t_mapping, - ¤t_mapping_size); + policydb->len = len; + rc = selinux_set_mapping(policydb, secclass_map, + &state->ss->map); if (rc) { - policydb_destroy(&policydb); - avtab_cache_destroy(); - ebitmap_cache_destroy(); - hashtab_cache_destroy(); + policydb_destroy(policydb); goto out; } - rc = policydb_load_isids(&policydb, &sidtab); + rc = policydb_load_isids(policydb, sidtab); if (rc) { - policydb_destroy(&policydb); - avtab_cache_destroy(); - ebitmap_cache_destroy(); - hashtab_cache_destroy(); + policydb_destroy(policydb); goto out; } - security_load_policycaps(); - ss_initialized = 1; - seqno = ++latest_granting; + security_load_policycaps(state); + state->initialized = 1; + seqno = ++state->ss->latest_granting; selinux_complete_init(); avc_ss_reset(seqno); selnl_notify_policyload(seqno); - selinux_status_update_policyload(seqno); + selinux_status_update_policyload(state, seqno); selinux_netlbl_cache_invalidate(); selinux_xfrm_notify_policyload(); goto out; } #if 0 - sidtab_hash_eval(&sidtab, "sids"); + sidtab_hash_eval(sidtab, "sids"); #endif rc = policydb_read(newpolicydb, fp); @@ -2113,9 +2169,9 @@ int security_load_policy(void *data, size_t len) newpolicydb->len = len; /* If switching between different policy types, log MLS status */ - if (policydb.mls_enabled && !newpolicydb->mls_enabled) + if (policydb->mls_enabled && !newpolicydb->mls_enabled) printk(KERN_INFO "SELinux: Disabling MLS support...\n"); - else if (!policydb.mls_enabled && newpolicydb->mls_enabled) + else if (!policydb->mls_enabled && newpolicydb->mls_enabled) printk(KERN_INFO "SELinux: Enabling MLS support...\n"); rc = policydb_load_isids(newpolicydb, &newsidtab); @@ -2125,20 +2181,20 @@ int security_load_policy(void *data, size_t len) goto out; } - rc = selinux_set_mapping(newpolicydb, secclass_map, &map, &map_size); + rc = selinux_set_mapping(newpolicydb, secclass_map, &newmap); if (rc) goto err; - rc = security_preserve_bools(newpolicydb); + rc = security_preserve_bools(state, newpolicydb); if (rc) { printk(KERN_ERR "SELinux: unable to preserve booleans\n"); goto err; } /* Clone the SID table. */ - sidtab_shutdown(&sidtab); + sidtab_shutdown(sidtab); - rc = sidtab_map(&sidtab, clone_sid, &newsidtab); + rc = sidtab_map(sidtab, clone_sid, &newsidtab); if (rc) goto err; @@ -2146,7 +2202,8 @@ int security_load_policy(void *data, size_t len) * Convert the internal representations of contexts * in the new SID table. */ - args.oldp = &policydb; + args.state = state; + args.oldp = policydb; args.newp = newpolicydb; rc = sidtab_map(&newsidtab, convert_context, &args); if (rc) { @@ -2157,28 +2214,28 @@ int security_load_policy(void *data, size_t len) } /* Save the old policydb and SID table to free later. */ - memcpy(oldpolicydb, &policydb, sizeof(policydb)); - sidtab_set(&oldsidtab, &sidtab); + memcpy(oldpolicydb, policydb, sizeof(*policydb)); + sidtab_set(&oldsidtab, sidtab); /* Install the new policydb and SID table. */ - write_lock_irq(&policy_rwlock); - memcpy(&policydb, newpolicydb, sizeof(policydb)); - sidtab_set(&sidtab, &newsidtab); - security_load_policycaps(); - oldmap = current_mapping; - current_mapping = map; - current_mapping_size = map_size; - seqno = ++latest_granting; - write_unlock_irq(&policy_rwlock); + write_lock_irq(&state->ss->policy_rwlock); + memcpy(policydb, newpolicydb, sizeof(*policydb)); + sidtab_set(sidtab, &newsidtab); + security_load_policycaps(state); + oldmapping = state->ss->map.mapping; + state->ss->map.mapping = newmap.mapping; + state->ss->map.size = newmap.size; + seqno = ++state->ss->latest_granting; + write_unlock_irq(&state->ss->policy_rwlock); /* Free the old policydb and SID table. */ policydb_destroy(oldpolicydb); sidtab_destroy(&oldsidtab); - kfree(oldmap); + kfree(oldmapping); avc_ss_reset(seqno); selnl_notify_policyload(seqno); - selinux_status_update_policyload(seqno); + selinux_status_update_policyload(state, seqno); selinux_netlbl_cache_invalidate(); selinux_xfrm_notify_policyload(); @@ -2186,7 +2243,7 @@ int security_load_policy(void *data, size_t len) goto out; err: - kfree(map); + kfree(newmap.mapping); sidtab_destroy(&newsidtab); policydb_destroy(newpolicydb); @@ -2195,13 +2252,14 @@ out: return rc; } -size_t security_policydb_len(void) +size_t security_policydb_len(struct selinux_state *state) { + struct policydb *p = &state->ss->policydb; size_t len; - read_lock(&policy_rwlock); - len = policydb.len; - read_unlock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + len = p->len; + read_unlock(&state->ss->policy_rwlock); return len; } @@ -2212,14 +2270,20 @@ size_t security_policydb_len(void) * @port: port number * @out_sid: security identifier */ -int security_port_sid(u8 protocol, u16 port, u32 *out_sid) +int security_port_sid(struct selinux_state *state, + u8 protocol, u16 port, u32 *out_sid) { + struct policydb *policydb; + struct sidtab *sidtab; struct ocontext *c; int rc = 0; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; - c = policydb.ocontexts[OCON_PORT]; + c = policydb->ocontexts[OCON_PORT]; while (c) { if (c->u.port.protocol == protocol && c->u.port.low_port <= port && @@ -2230,7 +2294,7 @@ int security_port_sid(u8 protocol, u16 port, u32 *out_sid) if (c) { if (!c->sid[0]) { - rc = sidtab_context_to_sid(&sidtab, + rc = sidtab_context_to_sid(sidtab, &c->context[0], &c->sid[0]); if (rc) @@ -2242,7 +2306,7 @@ int security_port_sid(u8 protocol, u16 port, u32 *out_sid) } out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; } @@ -2252,14 +2316,20 @@ out: * @pkey_num: pkey number * @out_sid: security identifier */ -int security_ib_pkey_sid(u64 subnet_prefix, u16 pkey_num, u32 *out_sid) +int security_ib_pkey_sid(struct selinux_state *state, + u64 subnet_prefix, u16 pkey_num, u32 *out_sid) { + struct policydb *policydb; + struct sidtab *sidtab; struct ocontext *c; int rc = 0; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; - c = policydb.ocontexts[OCON_IBPKEY]; + c = policydb->ocontexts[OCON_IBPKEY]; while (c) { if (c->u.ibpkey.low_pkey <= pkey_num && c->u.ibpkey.high_pkey >= pkey_num && @@ -2271,7 +2341,7 @@ int security_ib_pkey_sid(u64 subnet_prefix, u16 pkey_num, u32 *out_sid) if (c) { if (!c->sid[0]) { - rc = sidtab_context_to_sid(&sidtab, + rc = sidtab_context_to_sid(sidtab, &c->context[0], &c->sid[0]); if (rc) @@ -2282,7 +2352,7 @@ int security_ib_pkey_sid(u64 subnet_prefix, u16 pkey_num, u32 *out_sid) *out_sid = SECINITSID_UNLABELED; out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; } @@ -2292,14 +2362,20 @@ out: * @port: port number * @out_sid: security identifier */ -int security_ib_endport_sid(const char *dev_name, u8 port_num, u32 *out_sid) +int security_ib_endport_sid(struct selinux_state *state, + const char *dev_name, u8 port_num, u32 *out_sid) { + struct policydb *policydb; + struct sidtab *sidtab; struct ocontext *c; int rc = 0; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); - c = policydb.ocontexts[OCON_IBENDPORT]; + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; + + c = policydb->ocontexts[OCON_IBENDPORT]; while (c) { if (c->u.ibendport.port == port_num && !strncmp(c->u.ibendport.dev_name, @@ -2312,7 +2388,7 @@ int security_ib_endport_sid(const char *dev_name, u8 port_num, u32 *out_sid) if (c) { if (!c->sid[0]) { - rc = sidtab_context_to_sid(&sidtab, + rc = sidtab_context_to_sid(sidtab, &c->context[0], &c->sid[0]); if (rc) @@ -2323,7 +2399,7 @@ int security_ib_endport_sid(const char *dev_name, u8 port_num, u32 *out_sid) *out_sid = SECINITSID_UNLABELED; out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; } @@ -2332,14 +2408,20 @@ out: * @name: interface name * @if_sid: interface SID */ -int security_netif_sid(char *name, u32 *if_sid) +int security_netif_sid(struct selinux_state *state, + char *name, u32 *if_sid) { + struct policydb *policydb; + struct sidtab *sidtab; int rc = 0; struct ocontext *c; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; - c = policydb.ocontexts[OCON_NETIF]; + c = policydb->ocontexts[OCON_NETIF]; while (c) { if (strcmp(name, c->u.name) == 0) break; @@ -2348,12 +2430,12 @@ int security_netif_sid(char *name, u32 *if_sid) if (c) { if (!c->sid[0] || !c->sid[1]) { - rc = sidtab_context_to_sid(&sidtab, + rc = sidtab_context_to_sid(sidtab, &c->context[0], &c->sid[0]); if (rc) goto out; - rc = sidtab_context_to_sid(&sidtab, + rc = sidtab_context_to_sid(sidtab, &c->context[1], &c->sid[1]); if (rc) @@ -2364,7 +2446,7 @@ int security_netif_sid(char *name, u32 *if_sid) *if_sid = SECINITSID_NETIF; out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; } @@ -2388,15 +2470,21 @@ static int match_ipv6_addrmask(u32 *input, u32 *addr, u32 *mask) * @addrlen: address length in bytes * @out_sid: security identifier */ -int security_node_sid(u16 domain, +int security_node_sid(struct selinux_state *state, + u16 domain, void *addrp, u32 addrlen, u32 *out_sid) { + struct policydb *policydb; + struct sidtab *sidtab; int rc; struct ocontext *c; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; switch (domain) { case AF_INET: { @@ -2408,7 +2496,7 @@ int security_node_sid(u16 domain, addr = *((u32 *)addrp); - c = policydb.ocontexts[OCON_NODE]; + c = policydb->ocontexts[OCON_NODE]; while (c) { if (c->u.node.addr == (addr & c->u.node.mask)) break; @@ -2421,7 +2509,7 @@ int security_node_sid(u16 domain, rc = -EINVAL; if (addrlen != sizeof(u64) * 2) goto out; - c = policydb.ocontexts[OCON_NODE6]; + c = policydb->ocontexts[OCON_NODE6]; while (c) { if (match_ipv6_addrmask(addrp, c->u.node6.addr, c->u.node6.mask)) @@ -2438,7 +2526,7 @@ int security_node_sid(u16 domain, if (c) { if (!c->sid[0]) { - rc = sidtab_context_to_sid(&sidtab, + rc = sidtab_context_to_sid(sidtab, &c->context[0], &c->sid[0]); if (rc) @@ -2451,7 +2539,7 @@ int security_node_sid(u16 domain, rc = 0; out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; } @@ -2471,11 +2559,14 @@ out: * number of elements in the array. */ -int security_get_user_sids(u32 fromsid, +int security_get_user_sids(struct selinux_state *state, + u32 fromsid, char *username, u32 **sids, u32 *nel) { + struct policydb *policydb; + struct sidtab *sidtab; struct context *fromcon, usercon; u32 *mysids = NULL, *mysids2, sid; u32 mynel = 0, maxnel = SIDS_NEL; @@ -2487,20 +2578,23 @@ int security_get_user_sids(u32 fromsid, *sids = NULL; *nel = 0; - if (!ss_initialized) + if (!state->initialized) goto out; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; context_init(&usercon); rc = -EINVAL; - fromcon = sidtab_search(&sidtab, fromsid); + fromcon = sidtab_search(sidtab, fromsid); if (!fromcon) goto out_unlock; rc = -EINVAL; - user = hashtab_search(policydb.p_users.table, username); + user = hashtab_search(policydb->p_users.table, username); if (!user) goto out_unlock; @@ -2512,15 +2606,16 @@ int security_get_user_sids(u32 fromsid, goto out_unlock; ebitmap_for_each_positive_bit(&user->roles, rnode, i) { - role = policydb.role_val_to_struct[i]; + role = policydb->role_val_to_struct[i]; usercon.role = i + 1; ebitmap_for_each_positive_bit(&role->types, tnode, j) { usercon.type = j + 1; - if (mls_setup_user_range(fromcon, user, &usercon)) + if (mls_setup_user_range(policydb, fromcon, user, + &usercon)) continue; - rc = sidtab_context_to_sid(&sidtab, &usercon, &sid); + rc = sidtab_context_to_sid(sidtab, &usercon, &sid); if (rc) goto out_unlock; if (mynel < maxnel) { @@ -2540,7 +2635,7 @@ int security_get_user_sids(u32 fromsid, } rc = 0; out_unlock: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); if (rc || !mynel) { kfree(mysids); goto out; @@ -2583,11 +2678,14 @@ out: * * The caller must acquire the policy_rwlock before calling this function. */ -static inline int __security_genfs_sid(const char *fstype, +static inline int __security_genfs_sid(struct selinux_state *state, + const char *fstype, char *path, u16 orig_sclass, u32 *sid) { + struct policydb *policydb = &state->ss->policydb; + struct sidtab *sidtab = &state->ss->sidtab; int len; u16 sclass; struct genfs *genfs; @@ -2597,10 +2695,10 @@ static inline int __security_genfs_sid(const char *fstype, while (path[0] == '/' && path[1] == '/') path++; - sclass = unmap_class(orig_sclass); + sclass = unmap_class(&state->ss->map, orig_sclass); *sid = SECINITSID_UNLABELED; - for (genfs = policydb.genfs; genfs; genfs = genfs->next) { + for (genfs = policydb->genfs; genfs; genfs = genfs->next) { cmp = strcmp(fstype, genfs->fstype); if (cmp <= 0) break; @@ -2622,7 +2720,7 @@ static inline int __security_genfs_sid(const char *fstype, goto out; if (!c->sid[0]) { - rc = sidtab_context_to_sid(&sidtab, &c->context[0], &c->sid[0]); + rc = sidtab_context_to_sid(sidtab, &c->context[0], &c->sid[0]); if (rc) goto out; } @@ -2643,16 +2741,17 @@ out: * Acquire policy_rwlock before calling __security_genfs_sid() and release * it afterward. */ -int security_genfs_sid(const char *fstype, +int security_genfs_sid(struct selinux_state *state, + const char *fstype, char *path, u16 orig_sclass, u32 *sid) { int retval; - read_lock(&policy_rwlock); - retval = __security_genfs_sid(fstype, path, orig_sclass, sid); - read_unlock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + retval = __security_genfs_sid(state, fstype, path, orig_sclass, sid); + read_unlock(&state->ss->policy_rwlock); return retval; } @@ -2660,16 +2759,21 @@ int security_genfs_sid(const char *fstype, * security_fs_use - Determine how to handle labeling for a filesystem. * @sb: superblock in question */ -int security_fs_use(struct super_block *sb) +int security_fs_use(struct selinux_state *state, struct super_block *sb) { + struct policydb *policydb; + struct sidtab *sidtab; int rc = 0; struct ocontext *c; struct superblock_security_struct *sbsec = sb->s_security; const char *fstype = sb->s_type->name; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + + policydb = &state->ss->policydb; + sidtab = &state->ss->sidtab; - c = policydb.ocontexts[OCON_FSUSE]; + c = policydb->ocontexts[OCON_FSUSE]; while (c) { if (strcmp(fstype, c->u.name) == 0) break; @@ -2679,14 +2783,14 @@ int security_fs_use(struct super_block *sb) if (c) { sbsec->behavior = c->v.behavior; if (!c->sid[0]) { - rc = sidtab_context_to_sid(&sidtab, &c->context[0], + rc = sidtab_context_to_sid(sidtab, &c->context[0], &c->sid[0]); if (rc) goto out; } sbsec->sid = c->sid[0]; } else { - rc = __security_genfs_sid(fstype, "/", SECCLASS_DIR, + rc = __security_genfs_sid(state, fstype, "/", SECCLASS_DIR, &sbsec->sid); if (rc) { sbsec->behavior = SECURITY_FS_USE_NONE; @@ -2697,20 +2801,25 @@ int security_fs_use(struct super_block *sb) } out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; } -int security_get_bools(int *len, char ***names, int **values) +int security_get_bools(struct selinux_state *state, + int *len, char ***names, int **values) { + struct policydb *policydb; int i, rc; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + + policydb = &state->ss->policydb; + *names = NULL; *values = NULL; rc = 0; - *len = policydb.p_bools.nprim; + *len = policydb->p_bools.nprim; if (!*len) goto out; @@ -2725,16 +2834,17 @@ int security_get_bools(int *len, char ***names, int **values) goto err; for (i = 0; i < *len; i++) { - (*values)[i] = policydb.bool_val_to_struct[i]->state; + (*values)[i] = policydb->bool_val_to_struct[i]->state; rc = -ENOMEM; - (*names)[i] = kstrdup(sym_name(&policydb, SYM_BOOLS, i), GFP_ATOMIC); + (*names)[i] = kstrdup(sym_name(policydb, SYM_BOOLS, i), + GFP_ATOMIC); if (!(*names)[i]) goto err; } rc = 0; out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; err: if (*names) { @@ -2746,90 +2856,98 @@ err: } -int security_set_bools(int len, int *values) +int security_set_bools(struct selinux_state *state, int len, int *values) { + struct policydb *policydb; int i, rc; int lenp, seqno = 0; struct cond_node *cur; - write_lock_irq(&policy_rwlock); + write_lock_irq(&state->ss->policy_rwlock); + + policydb = &state->ss->policydb; rc = -EFAULT; - lenp = policydb.p_bools.nprim; + lenp = policydb->p_bools.nprim; if (len != lenp) goto out; for (i = 0; i < len; i++) { - if (!!values[i] != policydb.bool_val_to_struct[i]->state) { + if (!!values[i] != policydb->bool_val_to_struct[i]->state) { audit_log(current->audit_context, GFP_ATOMIC, AUDIT_MAC_CONFIG_CHANGE, "bool=%s val=%d old_val=%d auid=%u ses=%u", - sym_name(&policydb, SYM_BOOLS, i), + sym_name(policydb, SYM_BOOLS, i), !!values[i], - policydb.bool_val_to_struct[i]->state, + policydb->bool_val_to_struct[i]->state, from_kuid(&init_user_ns, audit_get_loginuid(current)), audit_get_sessionid(current)); } if (values[i]) - policydb.bool_val_to_struct[i]->state = 1; + policydb->bool_val_to_struct[i]->state = 1; else - policydb.bool_val_to_struct[i]->state = 0; + policydb->bool_val_to_struct[i]->state = 0; } - for (cur = policydb.cond_list; cur; cur = cur->next) { - rc = evaluate_cond_node(&policydb, cur); + for (cur = policydb->cond_list; cur; cur = cur->next) { + rc = evaluate_cond_node(policydb, cur); if (rc) goto out; } - seqno = ++latest_granting; + seqno = ++state->ss->latest_granting; rc = 0; out: - write_unlock_irq(&policy_rwlock); + write_unlock_irq(&state->ss->policy_rwlock); if (!rc) { avc_ss_reset(seqno); selnl_notify_policyload(seqno); - selinux_status_update_policyload(seqno); + selinux_status_update_policyload(state, seqno); selinux_xfrm_notify_policyload(); } return rc; } -int security_get_bool_value(int index) +int security_get_bool_value(struct selinux_state *state, + int index) { + struct policydb *policydb; int rc; int len; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + + policydb = &state->ss->policydb; rc = -EFAULT; - len = policydb.p_bools.nprim; + len = policydb->p_bools.nprim; if (index >= len) goto out; - rc = policydb.bool_val_to_struct[index]->state; + rc = policydb->bool_val_to_struct[index]->state; out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; } -static int security_preserve_bools(struct policydb *p) +static int security_preserve_bools(struct selinux_state *state, + struct policydb *policydb) { int rc, nbools = 0, *bvalues = NULL, i; char **bnames = NULL; struct cond_bool_datum *booldatum; struct cond_node *cur; - rc = security_get_bools(&nbools, &bnames, &bvalues); + rc = security_get_bools(state, &nbools, &bnames, &bvalues); if (rc) goto out; for (i = 0; i < nbools; i++) { - booldatum = hashtab_search(p->p_bools.table, bnames[i]); + booldatum = hashtab_search(policydb->p_bools.table, bnames[i]); if (booldatum) booldatum->state = bvalues[i]; } - for (cur = p->cond_list; cur; cur = cur->next) { - rc = evaluate_cond_node(p, cur); + for (cur = policydb->cond_list; cur; cur = cur->next) { + rc = evaluate_cond_node(policydb, cur); if (rc) goto out; } @@ -2848,8 +2966,11 @@ out: * security_sid_mls_copy() - computes a new sid based on the given * sid and the mls portion of mls_sid. */ -int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid) +int security_sid_mls_copy(struct selinux_state *state, + u32 sid, u32 mls_sid, u32 *new_sid) { + struct policydb *policydb = &state->ss->policydb; + struct sidtab *sidtab = &state->ss->sidtab; struct context *context1; struct context *context2; struct context newcon; @@ -2858,17 +2979,17 @@ int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid) int rc; rc = 0; - if (!ss_initialized || !policydb.mls_enabled) { + if (!state->initialized || !policydb->mls_enabled) { *new_sid = sid; goto out; } context_init(&newcon); - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); rc = -EINVAL; - context1 = sidtab_search(&sidtab, sid); + context1 = sidtab_search(sidtab, sid); if (!context1) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, sid); @@ -2876,7 +2997,7 @@ int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid) } rc = -EINVAL; - context2 = sidtab_search(&sidtab, mls_sid); + context2 = sidtab_search(sidtab, mls_sid); if (!context2) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, mls_sid); @@ -2891,10 +3012,11 @@ int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid) goto out_unlock; /* Check the validity of the new context. */ - if (!policydb_context_isvalid(&policydb, &newcon)) { - rc = convert_context_handle_invalid_context(&newcon); + if (!policydb_context_isvalid(policydb, &newcon)) { + rc = convert_context_handle_invalid_context(state, &newcon); if (rc) { - if (!context_struct_to_string(&newcon, &s, &len)) { + if (!context_struct_to_string(policydb, &newcon, &s, + &len)) { audit_log(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR, "op=security_sid_mls_copy " @@ -2905,9 +3027,9 @@ int security_sid_mls_copy(u32 sid, u32 mls_sid, u32 *new_sid) } } - rc = sidtab_context_to_sid(&sidtab, &newcon, new_sid); + rc = sidtab_context_to_sid(sidtab, &newcon, new_sid); out_unlock: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); context_destroy(&newcon); out: return rc; @@ -2933,10 +3055,13 @@ out: * multiple, inconsistent labels | -<errno> | SECSID_NULL * */ -int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, +int security_net_peersid_resolve(struct selinux_state *state, + u32 nlbl_sid, u32 nlbl_type, u32 xfrm_sid, u32 *peer_sid) { + struct policydb *policydb = &state->ss->policydb; + struct sidtab *sidtab = &state->ss->sidtab; int rc; struct context *nlbl_ctx; struct context *xfrm_ctx; @@ -2958,23 +3083,25 @@ int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, return 0; } - /* we don't need to check ss_initialized here since the only way both + /* + * We don't need to check initialized here since the only way both * nlbl_sid and xfrm_sid are not equal to SECSID_NULL would be if the - * security server was initialized and ss_initialized was true */ - if (!policydb.mls_enabled) + * security server was initialized and state->initialized was true. + */ + if (!policydb->mls_enabled) return 0; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); rc = -EINVAL; - nlbl_ctx = sidtab_search(&sidtab, nlbl_sid); + nlbl_ctx = sidtab_search(sidtab, nlbl_sid); if (!nlbl_ctx) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, nlbl_sid); goto out; } rc = -EINVAL; - xfrm_ctx = sidtab_search(&sidtab, xfrm_sid); + xfrm_ctx = sidtab_search(sidtab, xfrm_sid); if (!xfrm_ctx) { printk(KERN_ERR "SELinux: %s: unrecognized SID %d\n", __func__, xfrm_sid); @@ -2991,7 +3118,7 @@ int security_net_peersid_resolve(u32 nlbl_sid, u32 nlbl_type, * expressive */ *peer_sid = xfrm_sid; out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; } @@ -3008,19 +3135,21 @@ static int get_classes_callback(void *k, void *d, void *args) return 0; } -int security_get_classes(char ***classes, int *nclasses) +int security_get_classes(struct selinux_state *state, + char ***classes, int *nclasses) { + struct policydb *policydb = &state->ss->policydb; int rc; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); rc = -ENOMEM; - *nclasses = policydb.p_classes.nprim; + *nclasses = policydb->p_classes.nprim; *classes = kcalloc(*nclasses, sizeof(**classes), GFP_ATOMIC); if (!*classes) goto out; - rc = hashtab_map(policydb.p_classes.table, get_classes_callback, + rc = hashtab_map(policydb->p_classes.table, get_classes_callback, *classes); if (rc) { int i; @@ -3030,7 +3159,7 @@ int security_get_classes(char ***classes, int *nclasses) } out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; } @@ -3047,15 +3176,17 @@ static int get_permissions_callback(void *k, void *d, void *args) return 0; } -int security_get_permissions(char *class, char ***perms, int *nperms) +int security_get_permissions(struct selinux_state *state, + char *class, char ***perms, int *nperms) { + struct policydb *policydb = &state->ss->policydb; int rc, i; struct class_datum *match; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); rc = -EINVAL; - match = hashtab_search(policydb.p_classes.table, class); + match = hashtab_search(policydb->p_classes.table, class); if (!match) { printk(KERN_ERR "SELinux: %s: unrecognized class %s\n", __func__, class); @@ -3081,25 +3212,25 @@ int security_get_permissions(char *class, char ***perms, int *nperms) goto err; out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; err: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); for (i = 0; i < *nperms; i++) kfree((*perms)[i]); kfree(*perms); return rc; } -int security_get_reject_unknown(void) +int security_get_reject_unknown(struct selinux_state *state) { - return policydb.reject_unknown; + return state->ss->policydb.reject_unknown; } -int security_get_allow_unknown(void) +int security_get_allow_unknown(struct selinux_state *state) { - return policydb.allow_unknown; + return state->ss->policydb.allow_unknown; } /** @@ -3112,13 +3243,15 @@ int security_get_allow_unknown(void) * supported, false (0) if it isn't supported. * */ -int security_policycap_supported(unsigned int req_cap) +int security_policycap_supported(struct selinux_state *state, + unsigned int req_cap) { + struct policydb *policydb = &state->ss->policydb; int rc; - read_lock(&policy_rwlock); - rc = ebitmap_get_bit(&policydb.policycaps, req_cap); - read_unlock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + rc = ebitmap_get_bit(&policydb->policycaps, req_cap); + read_unlock(&state->ss->policy_rwlock); return rc; } @@ -3140,6 +3273,8 @@ void selinux_audit_rule_free(void *vrule) int selinux_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule) { + struct selinux_state *state = &selinux_state; + struct policydb *policydb = &state->ss->policydb; struct selinux_audit_rule *tmprule; struct role_datum *roledatum; struct type_datum *typedatum; @@ -3149,7 +3284,7 @@ int selinux_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule) *rule = NULL; - if (!ss_initialized) + if (!state->initialized) return -EOPNOTSUPP; switch (field) { @@ -3182,15 +3317,15 @@ int selinux_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule) context_init(&tmprule->au_ctxt); - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); - tmprule->au_seqno = latest_granting; + tmprule->au_seqno = state->ss->latest_granting; switch (field) { case AUDIT_SUBJ_USER: case AUDIT_OBJ_USER: rc = -EINVAL; - userdatum = hashtab_search(policydb.p_users.table, rulestr); + userdatum = hashtab_search(policydb->p_users.table, rulestr); if (!userdatum) goto out; tmprule->au_ctxt.user = userdatum->value; @@ -3198,7 +3333,7 @@ int selinux_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule) case AUDIT_SUBJ_ROLE: case AUDIT_OBJ_ROLE: rc = -EINVAL; - roledatum = hashtab_search(policydb.p_roles.table, rulestr); + roledatum = hashtab_search(policydb->p_roles.table, rulestr); if (!roledatum) goto out; tmprule->au_ctxt.role = roledatum->value; @@ -3206,7 +3341,7 @@ int selinux_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule) case AUDIT_SUBJ_TYPE: case AUDIT_OBJ_TYPE: rc = -EINVAL; - typedatum = hashtab_search(policydb.p_types.table, rulestr); + typedatum = hashtab_search(policydb->p_types.table, rulestr); if (!typedatum) goto out; tmprule->au_ctxt.type = typedatum->value; @@ -3215,14 +3350,15 @@ int selinux_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule) case AUDIT_SUBJ_CLR: case AUDIT_OBJ_LEV_LOW: case AUDIT_OBJ_LEV_HIGH: - rc = mls_from_string(rulestr, &tmprule->au_ctxt, GFP_ATOMIC); + rc = mls_from_string(policydb, rulestr, &tmprule->au_ctxt, + GFP_ATOMIC); if (rc) goto out; break; } rc = 0; out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); if (rc) { selinux_audit_rule_free(tmprule); @@ -3262,6 +3398,7 @@ int selinux_audit_rule_known(struct audit_krule *rule) int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *vrule, struct audit_context *actx) { + struct selinux_state *state = &selinux_state; struct context *ctxt; struct mls_level *level; struct selinux_audit_rule *rule = vrule; @@ -3272,14 +3409,14 @@ int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *vrule, return -ENOENT; } - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); - if (rule->au_seqno < latest_granting) { + if (rule->au_seqno < state->ss->latest_granting) { match = -ESTALE; goto out; } - ctxt = sidtab_search(&sidtab, sid); + ctxt = sidtab_search(&state->ss->sidtab, sid); if (unlikely(!ctxt)) { WARN_ONCE(1, "selinux_audit_rule_match: unrecognized SID %d\n", sid); @@ -3363,7 +3500,7 @@ int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *vrule, } out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return match; } @@ -3437,19 +3574,22 @@ static void security_netlbl_cache_add(struct netlbl_lsm_secattr *secattr, * failure. * */ -int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, +int security_netlbl_secattr_to_sid(struct selinux_state *state, + struct netlbl_lsm_secattr *secattr, u32 *sid) { + struct policydb *policydb = &state->ss->policydb; + struct sidtab *sidtab = &state->ss->sidtab; int rc; struct context *ctx; struct context ctx_new; - if (!ss_initialized) { + if (!state->initialized) { *sid = SECSID_NULL; return 0; } - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); if (secattr->flags & NETLBL_SECATTR_CACHE) *sid = *(u32 *)secattr->cache->data; @@ -3457,7 +3597,7 @@ int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, *sid = secattr->attr.secid; else if (secattr->flags & NETLBL_SECATTR_MLS_LVL) { rc = -EIDRM; - ctx = sidtab_search(&sidtab, SECINITSID_NETMSG); + ctx = sidtab_search(sidtab, SECINITSID_NETMSG); if (ctx == NULL) goto out; @@ -3465,17 +3605,17 @@ int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, ctx_new.user = ctx->user; ctx_new.role = ctx->role; ctx_new.type = ctx->type; - mls_import_netlbl_lvl(&ctx_new, secattr); + mls_import_netlbl_lvl(policydb, &ctx_new, secattr); if (secattr->flags & NETLBL_SECATTR_MLS_CAT) { - rc = mls_import_netlbl_cat(&ctx_new, secattr); + rc = mls_import_netlbl_cat(policydb, &ctx_new, secattr); if (rc) goto out; } rc = -EIDRM; - if (!mls_context_isvalid(&policydb, &ctx_new)) + if (!mls_context_isvalid(policydb, &ctx_new)) goto out_free; - rc = sidtab_context_to_sid(&sidtab, &ctx_new, sid); + rc = sidtab_context_to_sid(sidtab, &ctx_new, sid); if (rc) goto out_free; @@ -3485,12 +3625,12 @@ int security_netlbl_secattr_to_sid(struct netlbl_lsm_secattr *secattr, } else *sid = SECSID_NULL; - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return 0; out_free: ebitmap_destroy(&ctx_new.range.level[0].cat); out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; } @@ -3504,33 +3644,35 @@ out: * Returns zero on success, negative values on failure. * */ -int security_netlbl_sid_to_secattr(u32 sid, struct netlbl_lsm_secattr *secattr) +int security_netlbl_sid_to_secattr(struct selinux_state *state, + u32 sid, struct netlbl_lsm_secattr *secattr) { + struct policydb *policydb = &state->ss->policydb; int rc; struct context *ctx; - if (!ss_initialized) + if (!state->initialized) return 0; - read_lock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); rc = -ENOENT; - ctx = sidtab_search(&sidtab, sid); + ctx = sidtab_search(&state->ss->sidtab, sid); if (ctx == NULL) goto out; rc = -ENOMEM; - secattr->domain = kstrdup(sym_name(&policydb, SYM_TYPES, ctx->type - 1), + secattr->domain = kstrdup(sym_name(policydb, SYM_TYPES, ctx->type - 1), GFP_ATOMIC); if (secattr->domain == NULL) goto out; secattr->attr.secid = sid; secattr->flags |= NETLBL_SECATTR_DOMAIN_CPY | NETLBL_SECATTR_SECID; - mls_export_netlbl_lvl(ctx, secattr); - rc = mls_export_netlbl_cat(ctx, secattr); + mls_export_netlbl_lvl(policydb, ctx, secattr); + rc = mls_export_netlbl_cat(policydb, ctx, secattr); out: - read_unlock(&policy_rwlock); + read_unlock(&state->ss->policy_rwlock); return rc; } #endif /* CONFIG_NETLABEL */ @@ -3541,15 +3683,17 @@ out: * @len: length of data in bytes * */ -int security_read_policy(void **data, size_t *len) +int security_read_policy(struct selinux_state *state, + void **data, size_t *len) { + struct policydb *policydb = &state->ss->policydb; int rc; struct policy_file fp; - if (!ss_initialized) + if (!state->initialized) return -EINVAL; - *len = security_policydb_len(); + *len = security_policydb_len(state); *data = vmalloc_user(*len); if (!*data) @@ -3558,9 +3702,9 @@ int security_read_policy(void **data, size_t *len) fp.data = *data; fp.len = *len; - read_lock(&policy_rwlock); - rc = policydb_write(&policydb, &fp); - read_unlock(&policy_rwlock); + read_lock(&state->ss->policy_rwlock); + rc = policydb_write(policydb, &fp); + read_unlock(&state->ss->policy_rwlock); if (rc) return rc; |