--- /dev/null
+/*
+ * Implementation of the policy database.
+ *
+ * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
+ */
+
+/*
+ * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
+ *
+ * Support for enhanced MLS infrastructure.
+ *
+ * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
+ *
+ * Added conditional policy language extensions
+ *
+ * Updated: Hewlett-Packard <paul@paul-moore.com>
+ *
+ * Added support for the policy capability bitmap
+ *
+ * Copyright (C) 2007 Hewlett-Packard Development Company, L.P.
+ * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
+ * Copyright (C) 2003 - 2004 Tresys Technology, LLC
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2.
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/audit.h>
+#include <linux/flex_array.h>
+#include "security.h"
+
+#include "policydb.h"
+#include "conditional.h"
+#include "mls.h"
+#include "services.h"
+
+#define _DEBUG_HASHES
+
+#ifdef DEBUG_HASHES
+static const char *symtab_name[SYM_NUM] = {
+ "common prefixes",
+ "classes",
+ "roles",
+ "types",
+ "users",
+ "bools",
+ "levels",
+ "categories",
+};
+#endif
+
+static unsigned int symtab_sizes[SYM_NUM] = {
+ 2,
+ 32,
+ 16,
+ 512,
+ 128,
+ 16,
+ 16,
+ 16,
+};
+
+struct policydb_compat_info {
+ int version;
+ int sym_num;
+ int ocon_num;
+};
+
+/* These need to be updated if SYM_NUM or OCON_NUM changes */
+static struct policydb_compat_info policydb_compat[] = {
+ {
+ .version = POLICYDB_VERSION_BASE,
+ .sym_num = SYM_NUM - 3,
+ .ocon_num = OCON_NUM - 1,
+ },
+ {
+ .version = POLICYDB_VERSION_BOOL,
+ .sym_num = SYM_NUM - 2,
+ .ocon_num = OCON_NUM - 1,
+ },
+ {
+ .version = POLICYDB_VERSION_IPV6,
+ .sym_num = SYM_NUM - 2,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_NLCLASS,
+ .sym_num = SYM_NUM - 2,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_MLS,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_AVTAB,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_RANGETRANS,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_POLCAP,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_PERMISSIVE,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_BOUNDARY,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_FILENAME_TRANS,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_ROLETRANS,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_NEW_OBJECT_DEFAULTS,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_DEFAULT_TYPE,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
+ {
+ .version = POLICYDB_VERSION_CONSTRAINT_NAMES,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
+};
+
+static struct policydb_compat_info *policydb_lookup_compat(int version)
+{
+ int i;
+ struct policydb_compat_info *info = NULL;
+
+ for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
+ if (policydb_compat[i].version == version) {
+ info = &policydb_compat[i];
+ break;
+ }
+ }
+ return info;
+}
+
+/*
+ * Initialize the role table.
+ */
+static int roles_init(struct policydb *p)
+{
+ char *key = NULL;
+ int rc;
+ struct role_datum *role;
+
+ rc = -ENOMEM;
+ role = kzalloc(sizeof(*role), GFP_KERNEL);
+ if (!role)
+ goto out;
+
+ rc = -EINVAL;
+ role->value = ++p->p_roles.nprim;
+ if (role->value != OBJECT_R_VAL)
+ goto out;
+
+ rc = -ENOMEM;
+ key = kstrdup(OBJECT_R, GFP_KERNEL);
+ if (!key)
+ goto out;
+
+ rc = hashtab_insert(p->p_roles.table, key, role);
+ if (rc)
+ goto out;
+
+ return 0;
+out:
+ kfree(key);
+ kfree(role);
+ return rc;
+}
+
+static u32 filenametr_hash(struct hashtab *h, const void *k)
+{
+ const struct filename_trans *ft = k;
+ unsigned long hash;
+ unsigned int byte_num;
+ unsigned char focus;
+
+ hash = ft->stype ^ ft->ttype ^ ft->tclass;
+
+ byte_num = 0;
+ while ((focus = ft->name[byte_num++]))
+ hash = partial_name_hash(focus, hash);
+ return hash & (h->size - 1);
+}
+
+static int filenametr_cmp(struct hashtab *h, const void *k1, const void *k2)
+{
+ const struct filename_trans *ft1 = k1;
+ const struct filename_trans *ft2 = k2;
+ int v;
+
+ v = ft1->stype - ft2->stype;
+ if (v)
+ return v;
+
+ v = ft1->ttype - ft2->ttype;
+ if (v)
+ return v;
+
+ v = ft1->tclass - ft2->tclass;
+ if (v)
+ return v;
+
+ return strcmp(ft1->name, ft2->name);
+
+}
+
+static u32 rangetr_hash(struct hashtab *h, const void *k)
+{
+ const struct range_trans *key = k;
+ return (key->source_type + (key->target_type << 3) +
+ (key->target_class << 5)) & (h->size - 1);
+}
+
+static int rangetr_cmp(struct hashtab *h, const void *k1, const void *k2)
+{
+ const struct range_trans *key1 = k1, *key2 = k2;
+ int v;
+
+ v = key1->source_type - key2->source_type;
+ if (v)
+ return v;
+
+ v = key1->target_type - key2->target_type;
+ if (v)
+ return v;
+
+ v = key1->target_class - key2->target_class;
+
+ return v;
+}
+
+/*
+ * Initialize a policy database structure.
+ */
+static int policydb_init(struct policydb *p)
+{
+ int i, rc;
+
+ memset(p, 0, sizeof(*p));
+
+ for (i = 0; i < SYM_NUM; i++) {
+ rc = symtab_init(&p->symtab[i], symtab_sizes[i]);
+ if (rc)
+ goto out;
+ }
+
+ rc = avtab_init(&p->te_avtab);
+ if (rc)
+ goto out;
+
+ rc = roles_init(p);
+ if (rc)
+ goto out;
+
+ rc = cond_policydb_init(p);
+ if (rc)
+ goto out;
+
+ p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10));
+ if (!p->filename_trans) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
+ if (!p->range_tr) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ ebitmap_init(&p->filename_trans_ttypes);
+ ebitmap_init(&p->policycaps);
+ ebitmap_init(&p->permissive_map);
+
+ return 0;
+out:
+ hashtab_destroy(p->filename_trans);
+ hashtab_destroy(p->range_tr);
+ for (i = 0; i < SYM_NUM; i++)
+ hashtab_destroy(p->symtab[i].table);
+ return rc;
+}
+
+/*
+ * The following *_index functions are used to
+ * define the val_to_name and val_to_struct arrays
+ * in a policy database structure. The val_to_name
+ * arrays are used when converting security context
+ * structures into string representations. The
+ * val_to_struct arrays are used when the attributes
+ * of a class, role, or user are needed.
+ */
+
+static int common_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct common_datum *comdatum;
+ struct flex_array *fa;
+
+ comdatum = datum;
+ p = datap;
+ if (!comdatum->value || comdatum->value > p->p_commons.nprim)
+ return -EINVAL;
+
+ fa = p->sym_val_to_name[SYM_COMMONS];
+ if (flex_array_put_ptr(fa, comdatum->value - 1, key,
+ GFP_KERNEL | __GFP_ZERO))
+ BUG();
+ return 0;
+}
+
+static int class_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct class_datum *cladatum;
+ struct flex_array *fa;
+
+ cladatum = datum;
+ p = datap;
+ if (!cladatum->value || cladatum->value > p->p_classes.nprim)
+ return -EINVAL;
+ fa = p->sym_val_to_name[SYM_CLASSES];
+ if (flex_array_put_ptr(fa, cladatum->value - 1, key,
+ GFP_KERNEL | __GFP_ZERO))
+ BUG();
+ p->class_val_to_struct[cladatum->value - 1] = cladatum;
+ return 0;
+}
+
+static int role_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct role_datum *role;
+ struct flex_array *fa;
+
+ role = datum;
+ p = datap;
+ if (!role->value
+ || role->value > p->p_roles.nprim
+ || role->bounds > p->p_roles.nprim)
+ return -EINVAL;
+
+ fa = p->sym_val_to_name[SYM_ROLES];
+ if (flex_array_put_ptr(fa, role->value - 1, key,
+ GFP_KERNEL | __GFP_ZERO))
+ BUG();
+ p->role_val_to_struct[role->value - 1] = role;
+ return 0;
+}
+
+static int type_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct type_datum *typdatum;
+ struct flex_array *fa;
+
+ typdatum = datum;
+ p = datap;
+
+ if (typdatum->primary) {
+ if (!typdatum->value
+ || typdatum->value > p->p_types.nprim
+ || typdatum->bounds > p->p_types.nprim)
+ return -EINVAL;
+ fa = p->sym_val_to_name[SYM_TYPES];
+ if (flex_array_put_ptr(fa, typdatum->value - 1, key,
+ GFP_KERNEL | __GFP_ZERO))
+ BUG();
+
+ fa = p->type_val_to_struct_array;
+ if (flex_array_put_ptr(fa, typdatum->value - 1, typdatum,
+ GFP_KERNEL | __GFP_ZERO))
+ BUG();
+ }
+
+ return 0;
+}
+
+static int user_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct user_datum *usrdatum;
+ struct flex_array *fa;
+
+ usrdatum = datum;
+ p = datap;
+ if (!usrdatum->value
+ || usrdatum->value > p->p_users.nprim
+ || usrdatum->bounds > p->p_users.nprim)
+ return -EINVAL;
+
+ fa = p->sym_val_to_name[SYM_USERS];
+ if (flex_array_put_ptr(fa, usrdatum->value - 1, key,
+ GFP_KERNEL | __GFP_ZERO))
+ BUG();
+ p->user_val_to_struct[usrdatum->value - 1] = usrdatum;
+ return 0;
+}
+
+static int sens_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct level_datum *levdatum;
+ struct flex_array *fa;
+
+ levdatum = datum;
+ p = datap;
+
+ if (!levdatum->isalias) {
+ if (!levdatum->level->sens ||
+ levdatum->level->sens > p->p_levels.nprim)
+ return -EINVAL;
+ fa = p->sym_val_to_name[SYM_LEVELS];
+ if (flex_array_put_ptr(fa, levdatum->level->sens - 1, key,
+ GFP_KERNEL | __GFP_ZERO))
+ BUG();
+ }
+
+ return 0;
+}
+
+static int cat_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct cat_datum *catdatum;
+ struct flex_array *fa;
+
+ catdatum = datum;
+ p = datap;
+
+ if (!catdatum->isalias) {
+ if (!catdatum->value || catdatum->value > p->p_cats.nprim)
+ return -EINVAL;
+ fa = p->sym_val_to_name[SYM_CATS];
+ if (flex_array_put_ptr(fa, catdatum->value - 1, key,
+ GFP_KERNEL | __GFP_ZERO))
+ BUG();
+ }
+
+ return 0;
+}
+
+static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
+{
+ common_index,
+ class_index,
+ role_index,
+ type_index,
+ user_index,
+ cond_index_bool,
+ sens_index,
+ cat_index,
+};
+
+#ifdef DEBUG_HASHES
+static void hash_eval(struct hashtab *h, const char *hash_name)
+{
+ struct hashtab_info info;
+
+ hashtab_stat(h, &info);
+ printk(KERN_DEBUG "SELinux: %s: %d entries and %d/%d buckets used, "
+ "longest chain length %d\n", hash_name, h->nel,
+ info.slots_used, h->size, info.max_chain_len);
+}
+
+static void symtab_hash_eval(struct symtab *s)
+{
+ int i;
+
+ for (i = 0; i < SYM_NUM; i++)
+ hash_eval(s[i].table, symtab_name[i]);
+}
+
+#else
+static inline void hash_eval(struct hashtab *h, char *hash_name)
+{
+}
+#endif
+
+/*
+ * Define the other val_to_name and val_to_struct arrays
+ * in a policy database structure.
+ *
+ * Caller must clean up on failure.
+ */
+static int policydb_index(struct policydb *p)
+{
+ int i, rc;
+
+ printk(KERN_DEBUG "SELinux: %d users, %d roles, %d types, %d bools",
+ p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim);
+ if (p->mls_enabled)
+ printk(", %d sens, %d cats", p->p_levels.nprim,
+ p->p_cats.nprim);
+ printk("\n");
+
+ printk(KERN_DEBUG "SELinux: %d classes, %d rules\n",
+ p->p_classes.nprim, p->te_avtab.nel);
+
+#ifdef DEBUG_HASHES
+ avtab_hash_eval(&p->te_avtab, "rules");
+ symtab_hash_eval(p->symtab);
+#endif
+
+ rc = -ENOMEM;
+ p->class_val_to_struct =
+ kmalloc(p->p_classes.nprim * sizeof(*(p->class_val_to_struct)),
+ GFP_KERNEL);
+ if (!p->class_val_to_struct)
+ goto out;
+
+ rc = -ENOMEM;
+ p->role_val_to_struct =
+ kmalloc(p->p_roles.nprim * sizeof(*(p->role_val_to_struct)),
+ GFP_KERNEL);
+ if (!p->role_val_to_struct)
+ goto out;
+
+ rc = -ENOMEM;
+ p->user_val_to_struct =
+ kmalloc(p->p_users.nprim * sizeof(*(p->user_val_to_struct)),
+ GFP_KERNEL);
+ if (!p->user_val_to_struct)
+ goto out;
+
+ /* Yes, I want the sizeof the pointer, not the structure */
+ rc = -ENOMEM;
+ p->type_val_to_struct_array = flex_array_alloc(sizeof(struct type_datum *),
+ p->p_types.nprim,
+ GFP_KERNEL | __GFP_ZERO);
+ if (!p->type_val_to_struct_array)
+ goto out;
+
+ rc = flex_array_prealloc(p->type_val_to_struct_array, 0,
+ p->p_types.nprim, GFP_KERNEL | __GFP_ZERO);
+ if (rc)
+ goto out;
+
+ rc = cond_init_bool_indexes(p);
+ if (rc)
+ goto out;
+
+ for (i = 0; i < SYM_NUM; i++) {
+ rc = -ENOMEM;
+ p->sym_val_to_name[i] = flex_array_alloc(sizeof(char *),
+ p->symtab[i].nprim,
+ GFP_KERNEL | __GFP_ZERO);
+ if (!p->sym_val_to_name[i])
+ goto out;
+
+ rc = flex_array_prealloc(p->sym_val_to_name[i],
+ 0, p->symtab[i].nprim,
+ GFP_KERNEL | __GFP_ZERO);
+ if (rc)
+ goto out;
+
+ rc = hashtab_map(p->symtab[i].table, index_f[i], p);
+ if (rc)
+ goto out;
+ }
+ rc = 0;
+out:
+ return rc;
+}
+
+/*
+ * The following *_destroy functions are used to
+ * free any memory allocated for each kind of
+ * symbol data in the policy database.
+ */
+
+static int perm_destroy(void *key, void *datum, void *p)
+{
+ kfree(key);
+ kfree(datum);
+ return 0;
+}
+
+static int common_destroy(void *key, void *datum, void *p)
+{
+ struct common_datum *comdatum;
+
+ kfree(key);
+ if (datum) {
+ comdatum = datum;
+ hashtab_map(comdatum->permissions.table, perm_destroy, NULL);
+ hashtab_destroy(comdatum->permissions.table);
+ }
+ kfree(datum);
+ return 0;
+}
+
+static void constraint_expr_destroy(struct constraint_expr *expr)
+{
+ if (expr) {
+ ebitmap_destroy(&expr->names);
+ if (expr->type_names) {
+ ebitmap_destroy(&expr->type_names->types);
+ ebitmap_destroy(&expr->type_names->negset);
+ kfree(expr->type_names);
+ }
+ kfree(expr);
+ }
+}
+
+static int cls_destroy(void *key, void *datum, void *p)
+{
+ struct class_datum *cladatum;
+ struct constraint_node *constraint, *ctemp;
+ struct constraint_expr *e, *etmp;
+
+ kfree(key);
+ if (datum) {
+ cladatum = datum;
+ hashtab_map(cladatum->permissions.table, perm_destroy, NULL);
+ hashtab_destroy(cladatum->permissions.table);
+ constraint = cladatum->constraints;
+ while (constraint) {
+ e = constraint->expr;
+ while (e) {
+ etmp = e;
+ e = e->next;
+ constraint_expr_destroy(etmp);
+ }
+ ctemp = constraint;
+ constraint = constraint->next;
+ kfree(ctemp);
+ }
+
+ constraint = cladatum->validatetrans;
+ while (constraint) {
+ e = constraint->expr;
+ while (e) {
+ etmp = e;
+ e = e->next;
+ constraint_expr_destroy(etmp);
+ }
+ ctemp = constraint;
+ constraint = constraint->next;
+ kfree(ctemp);
+ }
+ kfree(cladatum->comkey);
+ }
+ kfree(datum);
+ return 0;
+}
+
+static int role_destroy(void *key, void *datum, void *p)
+{
+ struct role_datum *role;
+
+ kfree(key);
+ if (datum) {
+ role = datum;
+ ebitmap_destroy(&role->dominates);
+ ebitmap_destroy(&role->types);
+ }
+ kfree(datum);
+ return 0;
+}
+
+static int type_destroy(void *key, void *datum, void *p)
+{
+ kfree(key);
+ kfree(datum);
+ return 0;
+}
+
+static int user_destroy(void *key, void *datum, void *p)
+{
+ struct user_datum *usrdatum;
+
+ kfree(key);
+ if (datum) {
+ usrdatum = datum;
+ ebitmap_destroy(&usrdatum->roles);
+ ebitmap_destroy(&usrdatum->range.level[0].cat);
+ ebitmap_destroy(&usrdatum->range.level[1].cat);
+ ebitmap_destroy(&usrdatum->dfltlevel.cat);
+ }
+ kfree(datum);
+ return 0;
+}
+
+static int sens_destroy(void *key, void *datum, void *p)
+{
+ struct level_datum *levdatum;
+
+ kfree(key);
+ if (datum) {
+ levdatum = datum;
+ ebitmap_destroy(&levdatum->level->cat);
+ kfree(levdatum->level);
+ }
+ kfree(datum);
+ return 0;
+}
+
+static int cat_destroy(void *key, void *datum, void *p)
+{
+ kfree(key);
+ kfree(datum);
+ return 0;
+}
+
+static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
+{
+ common_destroy,
+ cls_destroy,
+ role_destroy,
+ type_destroy,
+ user_destroy,
+ cond_destroy_bool,
+ sens_destroy,
+ cat_destroy,
+};
+
+static int filenametr_destroy(void *key, void *datum, void *p)
+{
+ struct filename_trans *ft = key;
+ kfree(ft->name);
+ kfree(key);
+ kfree(datum);
+ cond_resched();
+ return 0;
+}
+
+static int range_tr_destroy(void *key, void *datum, void *p)
+{
+ struct mls_range *rt = datum;
+ kfree(key);
+ ebitmap_destroy(&rt->level[0].cat);
+ ebitmap_destroy(&rt->level[1].cat);
+ kfree(datum);
+ cond_resched();
+ return 0;
+}
+
+static void ocontext_destroy(struct ocontext *c, int i)
+{
+ if (!c)
+ return;
+
+ context_destroy(&c->context[0]);
+ context_destroy(&c->context[1]);
+ if (i == OCON_ISID || i == OCON_FS ||
+ i == OCON_NETIF || i == OCON_FSUSE)
+ kfree(c->u.name);
+ kfree(c);
+}
+
+/*
+ * Free any memory allocated by a policy database structure.
+ */
+void policydb_destroy(struct policydb *p)
+{
+ struct ocontext *c, *ctmp;
+ struct genfs *g, *gtmp;
+ int i;
+ struct role_allow *ra, *lra = NULL;
+ struct role_trans *tr, *ltr = NULL;
+
+ for (i = 0; i < SYM_NUM; i++) {
+ cond_resched();
+ hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
+ hashtab_destroy(p->symtab[i].table);
+ }
+
+ for (i = 0; i < SYM_NUM; i++) {
+ if (p->sym_val_to_name[i])
+ flex_array_free(p->sym_val_to_name[i]);
+ }
+
+ kfree(p->class_val_to_struct);
+ kfree(p->role_val_to_struct);
+ kfree(p->user_val_to_struct);
+ if (p->type_val_to_struct_array)
+ flex_array_free(p->type_val_to_struct_array);
+
+ avtab_destroy(&p->te_avtab);
+
+ for (i = 0; i < OCON_NUM; i++) {
+ cond_resched();
+ c = p->ocontexts[i];
+ while (c) {
+ ctmp = c;
+ c = c->next;
+ ocontext_destroy(ctmp, i);
+ }
+ p->ocontexts[i] = NULL;
+ }
+
+ g = p->genfs;
+ while (g) {
+ cond_resched();
+ kfree(g->fstype);
+ c = g->head;
+ while (c) {
+ ctmp = c;
+ c = c->next;
+ ocontext_destroy(ctmp, OCON_FSUSE);
+ }
+ gtmp = g;
+ g = g->next;
+ kfree(gtmp);
+ }
+ p->genfs = NULL;
+
+ cond_policydb_destroy(p);
+
+ for (tr = p->role_tr; tr; tr = tr->next) {
+ cond_resched();
+ kfree(ltr);
+ ltr = tr;
+ }
+ kfree(ltr);
+
+ for (ra = p->role_allow; ra; ra = ra->next) {
+ cond_resched();
+ kfree(lra);
+ lra = ra;
+ }
+ kfree(lra);
+
+ hashtab_map(p->filename_trans, filenametr_destroy, NULL);
+ hashtab_destroy(p->filename_trans);
+
+ hashtab_map(p->range_tr, range_tr_destroy, NULL);
+ hashtab_destroy(p->range_tr);
+
+ if (p->type_attr_map_array) {
+ for (i = 0; i < p->p_types.nprim; i++) {
+ struct ebitmap *e;
+
+ e = flex_array_get(p->type_attr_map_array, i);
+ if (!e)
+ continue;
+ ebitmap_destroy(e);
+ }
+ flex_array_free(p->type_attr_map_array);
+ }
+
+ ebitmap_destroy(&p->filename_trans_ttypes);
+ ebitmap_destroy(&p->policycaps);
+ ebitmap_destroy(&p->permissive_map);
+
+ return;
+}
+
+/*
+ * Load the initial SIDs specified in a policy database
+ * structure into a SID table.
+ */
+int policydb_load_isids(struct policydb *p, struct sidtab *s)
+{
+ struct ocontext *head, *c;
+ int rc;
+
+ rc = sidtab_init(s);
+ if (rc) {
+ printk(KERN_ERR "SELinux: out of memory on SID table init\n");
+ goto out;
+ }
+
+ head = p->ocontexts[OCON_ISID];
+ for (c = head; c; c = c->next) {
+ rc = -EINVAL;
+ if (!c->context[0].user) {
+ printk(KERN_ERR "SELinux: SID %s was never defined.\n",
+ c->u.name);
+ goto out;
+ }
+
+ rc = sidtab_insert(s, c->sid[0], &c->context[0]);
+ if (rc) {
+ printk(KERN_ERR "SELinux: unable to load initial SID %s.\n",
+ c->u.name);
+ goto out;
+ }
+ }
+ rc = 0;
+out:
+ return rc;
+}
+
+int policydb_class_isvalid(struct policydb *p, unsigned int class)
+{
+ if (!class || class > p->p_classes.nprim)
+ return 0;
+ return 1;
+}
+
+int policydb_role_isvalid(struct policydb *p, unsigned int role)
+{
+ if (!role || role > p->p_roles.nprim)
+ return 0;
+ return 1;
+}
+
+int policydb_type_isvalid(struct policydb *p, unsigned int type)
+{
+ if (!type || type > p->p_types.nprim)
+ return 0;
+ return 1;
+}
+
+/*
+ * Return 1 if the fields in the security context
+ * structure `c' are valid. Return 0 otherwise.
+ */
+int policydb_context_isvalid(struct policydb *p, struct context *c)
+{
+ struct role_datum *role;
+ struct user_datum *usrdatum;
+
+ if (!c->role || c->role > p->p_roles.nprim)
+ return 0;
+
+ if (!c->user || c->user > p->p_users.nprim)
+ return 0;
+
+ if (!c->type || c->type > p->p_types.nprim)
+ return 0;
+
+ if (c->role != OBJECT_R_VAL) {
+ /*
+ * Role must be authorized for the type.
+ */
+ role = p->role_val_to_struct[c->role - 1];
+ if (!ebitmap_get_bit(&role->types, c->type - 1))
+ /* role may not be associated with type */
+ return 0;
+
+ /*
+ * User must be authorized for the role.
+ */
+ usrdatum = p->user_val_to_struct[c->user - 1];
+ if (!usrdatum)
+ return 0;
+
+ if (!ebitmap_get_bit(&usrdatum->roles, c->role - 1))
+ /* user may not be associated with role */
+ return 0;
+ }
+
+ if (!mls_context_isvalid(p, c))
+ return 0;
+
+ return 1;
+}
+
+/*
+ * Read a MLS range structure from a policydb binary
+ * representation file.
+ */
+static int mls_read_range_helper(struct mls_range *r, void *fp)
+{
+ __le32 buf[2];
+ u32 items;
+ int rc;
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto out;
+
+ rc = -EINVAL;
+ items = le32_to_cpu(buf[0]);
+ if (items > ARRAY_SIZE(buf)) {
+ printk(KERN_ERR "SELinux: mls: range overflow\n");
+ goto out;
+ }
+
+ rc = next_entry(buf, fp, sizeof(u32) * items);
+ if (rc) {
+ printk(KERN_ERR "SELinux: mls: truncated range\n");
+ goto out;
+ }
+
+ r->level[0].sens = le32_to_cpu(buf[0]);
+ if (items > 1)
+ r->level[1].sens = le32_to_cpu(buf[1]);
+ else
+ r->level[1].sens = r->level[0].sens;
+
+ rc = ebitmap_read(&r->level[0].cat, fp);
+ if (rc) {
+ printk(KERN_ERR "SELinux: mls: error reading low categories\n");
+ goto out;
+ }
+ if (items > 1) {
+ rc = ebitmap_read(&r->level[1].cat, fp);
+ if (rc) {
+ printk(KERN_ERR "SELinux: mls: error reading high categories\n");
+ goto bad_high;
+ }
+ } else {
+ rc = ebitmap_cpy(&r->level[1].cat, &r->level[0].cat);
+ if (rc) {
+ printk(KERN_ERR "SELinux: mls: out of memory\n");
+ goto bad_high;
+ }
+ }
+
+ return 0;
+bad_high:
+ ebitmap_destroy(&r->level[0].cat);
+out:
+ return rc;
+}
+
+/*
+ * Read and validate a security context structure
+ * from a policydb binary representation file.
+ */
+static int context_read_and_validate(struct context *c,
+ struct policydb *p,
+ void *fp)
+{
+ __le32 buf[3];
+ int rc;
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc) {
+ printk(KERN_ERR "SELinux: context truncated\n");
+ goto out;
+ }
+ c->user = le32_to_cpu(buf[0]);
+ c->role = le32_to_cpu(buf[1]);
+ c->type = le32_to_cpu(buf[2]);
+ if (p->policyvers >= POLICYDB_VERSION_MLS) {
+ rc = mls_read_range_helper(&c->range, fp);
+ if (rc) {
+ printk(KERN_ERR "SELinux: error reading MLS range of context\n");
+ goto out;
+ }
+ }
+
+ rc = -EINVAL;
+ if (!policydb_context_isvalid(p, c)) {
+ printk(KERN_ERR "SELinux: invalid security context\n");
+ context_destroy(c);
+ goto out;
+ }
+ rc = 0;
+out:
+ return rc;
+}
+
+/*
+ * The following *_read functions are used to
+ * read the symbol data from a policy database
+ * binary representation file.
+ */
+
+static int str_read(char **strp, gfp_t flags, void *fp, u32 len)
+{
+ int rc;
+ char *str;
+
+ str = kmalloc(len + 1, flags);
+ if (!str)
+ return -ENOMEM;
+
+ /* it's expected the caller should free the str */
+ *strp = str;
+
+ rc = next_entry(str, fp, len);
+ if (rc)
+ return rc;
+
+ str[len] = '\0';
+ return 0;
+}
+
+static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct perm_datum *perdatum;
+ int rc;
+ __le32 buf[2];
+ u32 len;
+
+ rc = -ENOMEM;
+ perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
+ if (!perdatum)
+ goto bad;
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ perdatum->value = le32_to_cpu(buf[1]);
+
+ rc = str_read(&key, GFP_KERNEL, fp, len);
+ if (rc)
+ goto bad;
+
+ rc = hashtab_insert(h, key, perdatum);
+ if (rc)
+ goto bad;
+
+ return 0;
+bad:
+ perm_destroy(key, perdatum, NULL);
+ return rc;
+}
+
+static int common_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct common_datum *comdatum;
+ __le32 buf[4];
+ u32 len, nel;
+ int i, rc;
+
+ rc = -ENOMEM;
+ comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
+ if (!comdatum)
+ goto bad;
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ comdatum->value = le32_to_cpu(buf[1]);
+
+ rc = symtab_init(&comdatum->permissions, PERM_SYMTAB_SIZE);
+ if (rc)
+ goto bad;
+ comdatum->permissions.nprim = le32_to_cpu(buf[2]);
+ nel = le32_to_cpu(buf[3]);
+
+ rc = str_read(&key, GFP_KERNEL, fp, len);
+ if (rc)
+ goto bad;
+
+ for (i = 0; i < nel; i++) {
+ rc = perm_read(p, comdatum->permissions.table, fp);
+ if (rc)
+ goto bad;
+ }
+
+ rc = hashtab_insert(h, key, comdatum);
+ if (rc)
+ goto bad;
+ return 0;
+bad:
+ common_destroy(key, comdatum, NULL);
+ return rc;
+}
+
+static void type_set_init(struct type_set *t)
+{
+ ebitmap_init(&t->types);
+ ebitmap_init(&t->negset);
+}
+
+static int type_set_read(struct type_set *t, void *fp)
+{
+ __le32 buf[1];
+ int rc;
+
+ if (ebitmap_read(&t->types, fp))
+ return -EINVAL;
+ if (ebitmap_read(&t->negset, fp))
+ return -EINVAL;
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ return -EINVAL;
+ t->flags = le32_to_cpu(buf[0]);
+
+ return 0;
+}
+
+
+static int read_cons_helper(struct policydb *p,
+ struct constraint_node **nodep,
+ int ncons, int allowxtarget, void *fp)
+{
+ struct constraint_node *c, *lc;
+ struct constraint_expr *e, *le;
+ __le32 buf[3];
+ u32 nexpr;
+ int rc, i, j, depth;
+
+ lc = NULL;
+ for (i = 0; i < ncons; i++) {
+ c = kzalloc(sizeof(*c), GFP_KERNEL);
+ if (!c)
+ return -ENOMEM;
+
+ if (lc)
+ lc->next = c;
+ else
+ *nodep = c;
+
+ rc = next_entry(buf, fp, (sizeof(u32) * 2));
+ if (rc)
+ return rc;
+ c->permissions = le32_to_cpu(buf[0]);
+ nexpr = le32_to_cpu(buf[1]);
+ le = NULL;
+ depth = -1;
+ for (j = 0; j < nexpr; j++) {
+ e = kzalloc(sizeof(*e), GFP_KERNEL);
+ if (!e)
+ return -ENOMEM;
+
+ if (le)
+ le->next = e;
+ else
+ c->expr = e;
+
+ rc = next_entry(buf, fp, (sizeof(u32) * 3));
+ if (rc)
+ return rc;
+ e->expr_type = le32_to_cpu(buf[0]);
+ e->attr = le32_to_cpu(buf[1]);
+ e->op = le32_to_cpu(buf[2]);
+
+ switch (e->expr_type) {
+ case CEXPR_NOT:
+ if (depth < 0)
+ return -EINVAL;
+ break;
+ case CEXPR_AND:
+ case CEXPR_OR:
+ if (depth < 1)
+ return -EINVAL;
+ depth--;
+ break;
+ case CEXPR_ATTR:
+ if (depth == (CEXPR_MAXDEPTH - 1))
+ return -EINVAL;
+ depth++;
+ break;
+ case CEXPR_NAMES:
+ if (!allowxtarget && (e->attr & CEXPR_XTARGET))
+ return -EINVAL;
+ if (depth == (CEXPR_MAXDEPTH - 1))
+ return -EINVAL;
+ depth++;
+ rc = ebitmap_read(&e->names, fp);
+ if (rc)
+ return rc;
+ if (p->policyvers >=
+ POLICYDB_VERSION_CONSTRAINT_NAMES) {
+ e->type_names = kzalloc(sizeof
+ (*e->type_names),
+ GFP_KERNEL);
+ if (!e->type_names)
+ return -ENOMEM;
+ type_set_init(e->type_names);
+ rc = type_set_read(e->type_names, fp);
+ if (rc)
+ return rc;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+ le = e;
+ }
+ if (depth != 0)
+ return -EINVAL;
+ lc = c;
+ }
+
+ return 0;
+}
+
+static int class_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct class_datum *cladatum;
+ __le32 buf[6];
+ u32 len, len2, ncons, nel;
+ int i, rc;
+
+ rc = -ENOMEM;
+ cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
+ if (!cladatum)
+ goto bad;
+
+ rc = next_entry(buf, fp, sizeof(u32)*6);
+ if (rc)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ len2 = le32_to_cpu(buf[1]);
+ cladatum->value = le32_to_cpu(buf[2]);
+
+ rc = symtab_init(&cladatum->permissions, PERM_SYMTAB_SIZE);
+ if (rc)
+ goto bad;
+ cladatum->permissions.nprim = le32_to_cpu(buf[3]);
+ nel = le32_to_cpu(buf[4]);
+
+ ncons = le32_to_cpu(buf[5]);
+
+ rc = str_read(&key, GFP_KERNEL, fp, len);
+ if (rc)
+ goto bad;
+
+ if (len2) {
+ rc = str_read(&cladatum->comkey, GFP_KERNEL, fp, len2);
+ if (rc)
+ goto bad;
+
+ rc = -EINVAL;
+ cladatum->comdatum = hashtab_search(p->p_commons.table, cladatum->comkey);
+ if (!cladatum->comdatum) {
+ printk(KERN_ERR "SELinux: unknown common %s\n", cladatum->comkey);
+ goto bad;
+ }
+ }
+ for (i = 0; i < nel; i++) {
+ rc = perm_read(p, cladatum->permissions.table, fp);
+ if (rc)
+ goto bad;
+ }
+
+ rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
+ if (rc)
+ goto bad;
+
+ if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
+ /* grab the validatetrans rules */
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto bad;
+ ncons = le32_to_cpu(buf[0]);
+ rc = read_cons_helper(p, &cladatum->validatetrans,
+ ncons, 1, fp);
+ if (rc)
+ goto bad;
+ }
+
+ if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
+ rc = next_entry(buf, fp, sizeof(u32) * 3);
+ if (rc)
+ goto bad;
+
+ cladatum->default_user = le32_to_cpu(buf[0]);
+ cladatum->default_role = le32_to_cpu(buf[1]);
+ cladatum->default_range = le32_to_cpu(buf[2]);
+ }
+
+ if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
+ rc = next_entry(buf, fp, sizeof(u32) * 1);
+ if (rc)
+ goto bad;
+ cladatum->default_type = le32_to_cpu(buf[0]);
+ }
+
+ rc = hashtab_insert(h, key, cladatum);
+ if (rc)
+ goto bad;
+
+ return 0;
+bad:
+ cls_destroy(key, cladatum, NULL);
+ return rc;
+}
+
+static int role_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct role_datum *role;
+ int rc, to_read = 2;
+ __le32 buf[3];
+ u32 len;
+
+ rc = -ENOMEM;
+ role = kzalloc(sizeof(*role), GFP_KERNEL);
+ if (!role)
+ goto bad;
+
+ if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
+ to_read = 3;
+
+ rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
+ if (rc)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ role->value = le32_to_cpu(buf[1]);
+ if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
+ role->bounds = le32_to_cpu(buf[2]);
+
+ rc = str_read(&key, GFP_KERNEL, fp, len);
+ if (rc)
+ goto bad;
+
+ rc = ebitmap_read(&role->dominates, fp);
+ if (rc)
+ goto bad;
+
+ rc = ebitmap_read(&role->types, fp);
+ if (rc)
+ goto bad;
+
+ if (strcmp(key, OBJECT_R) == 0) {
+ rc = -EINVAL;
+ if (role->value != OBJECT_R_VAL) {
+ printk(KERN_ERR "SELinux: Role %s has wrong value %d\n",
+ OBJECT_R, role->value);
+ goto bad;
+ }
+ rc = 0;
+ goto bad;
+ }
+
+ rc = hashtab_insert(h, key, role);
+ if (rc)
+ goto bad;
+ return 0;
+bad:
+ role_destroy(key, role, NULL);
+ return rc;
+}
+
+static int type_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct type_datum *typdatum;
+ int rc, to_read = 3;
+ __le32 buf[4];
+ u32 len;
+
+ rc = -ENOMEM;
+ typdatum = kzalloc(sizeof(*typdatum), GFP_KERNEL);
+ if (!typdatum)
+ goto bad;
+
+ if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
+ to_read = 4;
+
+ rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
+ if (rc)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ typdatum->value = le32_to_cpu(buf[1]);
+ if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
+ u32 prop = le32_to_cpu(buf[2]);
+
+ if (prop & TYPEDATUM_PROPERTY_PRIMARY)
+ typdatum->primary = 1;
+ if (prop & TYPEDATUM_PROPERTY_ATTRIBUTE)
+ typdatum->attribute = 1;
+
+ typdatum->bounds = le32_to_cpu(buf[3]);
+ } else {
+ typdatum->primary = le32_to_cpu(buf[2]);
+ }
+
+ rc = str_read(&key, GFP_KERNEL, fp, len);
+ if (rc)
+ goto bad;
+
+ rc = hashtab_insert(h, key, typdatum);
+ if (rc)
+ goto bad;
+ return 0;
+bad:
+ type_destroy(key, typdatum, NULL);
+ return rc;
+}
+
+
+/*
+ * Read a MLS level structure from a policydb binary
+ * representation file.
+ */
+static int mls_read_level(struct mls_level *lp, void *fp)
+{
+ __le32 buf[1];
+ int rc;
+
+ memset(lp, 0, sizeof(*lp));
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc) {
+ printk(KERN_ERR "SELinux: mls: truncated level\n");
+ return rc;
+ }
+ lp->sens = le32_to_cpu(buf[0]);
+
+ rc = ebitmap_read(&lp->cat, fp);
+ if (rc) {
+ printk(KERN_ERR "SELinux: mls: error reading level categories\n");
+ return rc;
+ }
+ return 0;
+}
+
+static int user_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct user_datum *usrdatum;
+ int rc, to_read = 2;
+ __le32 buf[3];
+ u32 len;
+
+ rc = -ENOMEM;
+ usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
+ if (!usrdatum)
+ goto bad;
+
+ if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
+ to_read = 3;
+
+ rc = next_entry(buf, fp, sizeof(buf[0]) * to_read);
+ if (rc)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ usrdatum->value = le32_to_cpu(buf[1]);
+ if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
+ usrdatum->bounds = le32_to_cpu(buf[2]);
+
+ rc = str_read(&key, GFP_KERNEL, fp, len);
+ if (rc)
+ goto bad;
+
+ rc = ebitmap_read(&usrdatum->roles, fp);
+ if (rc)
+ goto bad;
+
+ if (p->policyvers >= POLICYDB_VERSION_MLS) {
+ rc = mls_read_range_helper(&usrdatum->range, fp);
+ if (rc)
+ goto bad;
+ rc = mls_read_level(&usrdatum->dfltlevel, fp);
+ if (rc)
+ goto bad;
+ }
+
+ rc = hashtab_insert(h, key, usrdatum);
+ if (rc)
+ goto bad;
+ return 0;
+bad:
+ user_destroy(key, usrdatum, NULL);
+ return rc;
+}
+
+static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct level_datum *levdatum;
+ int rc;
+ __le32 buf[2];
+ u32 len;
+
+ rc = -ENOMEM;
+ levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
+ if (!levdatum)
+ goto bad;
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ levdatum->isalias = le32_to_cpu(buf[1]);
+
+ rc = str_read(&key, GFP_ATOMIC, fp, len);
+ if (rc)
+ goto bad;
+
+ rc = -ENOMEM;
+ levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC);
+ if (!levdatum->level)
+ goto bad;
+
+ rc = mls_read_level(levdatum->level, fp);
+ if (rc)
+ goto bad;
+
+ rc = hashtab_insert(h, key, levdatum);
+ if (rc)
+ goto bad;
+ return 0;
+bad:
+ sens_destroy(key, levdatum, NULL);
+ return rc;
+}
+
+static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
+{
+ char *key = NULL;
+ struct cat_datum *catdatum;
+ int rc;
+ __le32 buf[3];
+ u32 len;
+
+ rc = -ENOMEM;
+ catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
+ if (!catdatum)
+ goto bad;
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ catdatum->value = le32_to_cpu(buf[1]);
+ catdatum->isalias = le32_to_cpu(buf[2]);
+
+ rc = str_read(&key, GFP_ATOMIC, fp, len);
+ if (rc)
+ goto bad;
+
+ rc = hashtab_insert(h, key, catdatum);
+ if (rc)
+ goto bad;
+ return 0;
+bad:
+ cat_destroy(key, catdatum, NULL);
+ return rc;
+}
+
+static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
+{
+ common_read,
+ class_read,
+ role_read,
+ type_read,
+ user_read,
+ cond_read_bool,
+ sens_read,
+ cat_read,
+};
+
+static int user_bounds_sanity_check(void *key, void *datum, void *datap)
+{
+ struct user_datum *upper, *user;
+ struct policydb *p = datap;
+ int depth = 0;
+
+ upper = user = datum;
+ while (upper->bounds) {
+ struct ebitmap_node *node;
+ unsigned long bit;
+
+ if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
+ printk(KERN_ERR "SELinux: user %s: "
+ "too deep or looped boundary",
+ (char *) key);
+ return -EINVAL;
+ }
+
+ upper = p->user_val_to_struct[upper->bounds - 1];
+ ebitmap_for_each_positive_bit(&user->roles, node, bit) {
+ if (ebitmap_get_bit(&upper->roles, bit))
+ continue;
+
+ printk(KERN_ERR
+ "SELinux: boundary violated policy: "
+ "user=%s role=%s bounds=%s\n",
+ sym_name(p, SYM_USERS, user->value - 1),
+ sym_name(p, SYM_ROLES, bit),
+ sym_name(p, SYM_USERS, upper->value - 1));
+
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int role_bounds_sanity_check(void *key, void *datum, void *datap)
+{
+ struct role_datum *upper, *role;
+ struct policydb *p = datap;
+ int depth = 0;
+
+ upper = role = datum;
+ while (upper->bounds) {
+ struct ebitmap_node *node;
+ unsigned long bit;
+
+ if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
+ printk(KERN_ERR "SELinux: role %s: "
+ "too deep or looped bounds\n",
+ (char *) key);
+ return -EINVAL;
+ }
+
+ upper = p->role_val_to_struct[upper->bounds - 1];
+ ebitmap_for_each_positive_bit(&role->types, node, bit) {
+ if (ebitmap_get_bit(&upper->types, bit))
+ continue;
+
+ printk(KERN_ERR
+ "SELinux: boundary violated policy: "
+ "role=%s type=%s bounds=%s\n",
+ sym_name(p, SYM_ROLES, role->value - 1),
+ sym_name(p, SYM_TYPES, bit),
+ sym_name(p, SYM_ROLES, upper->value - 1));
+
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int type_bounds_sanity_check(void *key, void *datum, void *datap)
+{
+ struct type_datum *upper;
+ struct policydb *p = datap;
+ int depth = 0;
+
+ upper = datum;
+ while (upper->bounds) {
+ if (++depth == POLICYDB_BOUNDS_MAXDEPTH) {
+ printk(KERN_ERR "SELinux: type %s: "
+ "too deep or looped boundary\n",
+ (char *) key);
+ return -EINVAL;
+ }
+
+ upper = flex_array_get_ptr(p->type_val_to_struct_array,
+ upper->bounds - 1);
+ BUG_ON(!upper);
+
+ if (upper->attribute) {
+ printk(KERN_ERR "SELinux: type %s: "
+ "bounded by attribute %s",
+ (char *) key,
+ sym_name(p, SYM_TYPES, upper->value - 1));
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static int policydb_bounds_sanity_check(struct policydb *p)
+{
+ int rc;
+
+ if (p->policyvers < POLICYDB_VERSION_BOUNDARY)
+ return 0;
+
+ rc = hashtab_map(p->p_users.table,
+ user_bounds_sanity_check, p);
+ if (rc)
+ return rc;
+
+ rc = hashtab_map(p->p_roles.table,
+ role_bounds_sanity_check, p);
+ if (rc)
+ return rc;
+
+ rc = hashtab_map(p->p_types.table,
+ type_bounds_sanity_check, p);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+u16 string_to_security_class(struct policydb *p, const char *name)
+{
+ struct class_datum *cladatum;
+
+ cladatum = hashtab_search(p->p_classes.table, name);
+ if (!cladatum)
+ return 0;
+
+ return cladatum->value;
+}
+
+u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name)
+{
+ struct class_datum *cladatum;
+ struct perm_datum *perdatum = NULL;
+ struct common_datum *comdatum;
+
+ if (!tclass || tclass > p->p_classes.nprim)
+ return 0;
+
+ cladatum = p->class_val_to_struct[tclass-1];
+ comdatum = cladatum->comdatum;
+ if (comdatum)
+ perdatum = hashtab_search(comdatum->permissions.table,
+ name);
+ if (!perdatum)
+ perdatum = hashtab_search(cladatum->permissions.table,
+ name);
+ if (!perdatum)
+ return 0;
+
+ return 1U << (perdatum->value-1);
+}
+
+static int range_read(struct policydb *p, void *fp)
+{
+ struct range_trans *rt = NULL;
+ struct mls_range *r = NULL;
+ int i, rc;
+ __le32 buf[2];
+ u32 nel;
+
+ if (p->policyvers < POLICYDB_VERSION_MLS)
+ return 0;
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto out;
+
+ nel = le32_to_cpu(buf[0]);
+ for (i = 0; i < nel; i++) {
+ rc = -ENOMEM;
+ rt = kzalloc(sizeof(*rt), GFP_KERNEL);
+ if (!rt)
+ goto out;
+
+ rc = next_entry(buf, fp, (sizeof(u32) * 2));
+ if (rc)
+ goto out;
+
+ rt->source_type = le32_to_cpu(buf[0]);
+ rt->target_type = le32_to_cpu(buf[1]);
+ if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto out;
+ rt->target_class = le32_to_cpu(buf[0]);
+ } else
+ rt->target_class = p->process_class;
+
+ rc = -EINVAL;
+ if (!policydb_type_isvalid(p, rt->source_type) ||
+ !policydb_type_isvalid(p, rt->target_type) ||
+ !policydb_class_isvalid(p, rt->target_class))
+ goto out;
+
+ rc = -ENOMEM;
+ r = kzalloc(sizeof(*r), GFP_KERNEL);
+ if (!r)
+ goto out;
+
+ rc = mls_read_range_helper(r, fp);
+ if (rc)
+ goto out;
+
+ rc = -EINVAL;
+ if (!mls_range_isvalid(p, r)) {
+ printk(KERN_WARNING "SELinux: rangetrans: invalid range\n");
+ goto out;
+ }
+
+ rc = hashtab_insert(p->range_tr, rt, r);
+ if (rc)
+ goto out;
+
+ rt = NULL;
+ r = NULL;
+ }
+ hash_eval(p->range_tr, "rangetr");
+ rc = 0;
+out:
+ kfree(rt);
+ kfree(r);
+ return rc;
+}
+
+static int filename_trans_read(struct policydb *p, void *fp)
+{
+ struct filename_trans *ft;
+ struct filename_trans_datum *otype;
+ char *name;
+ u32 nel, len;
+ __le32 buf[4];
+ int rc, i;
+
+ if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
+ return 0;
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ return rc;
+ nel = le32_to_cpu(buf[0]);
+
+ for (i = 0; i < nel; i++) {
+ ft = NULL;
+ otype = NULL;
+ name = NULL;
+
+ rc = -ENOMEM;
+ ft = kzalloc(sizeof(*ft), GFP_KERNEL);
+ if (!ft)
+ goto out;
+
+ rc = -ENOMEM;
+ otype = kmalloc(sizeof(*otype), GFP_KERNEL);
+ if (!otype)
+ goto out;
+
+ /* length of the path component string */
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto out;
+ len = le32_to_cpu(buf[0]);
+
+ /* path component string */
+ rc = str_read(&name, GFP_KERNEL, fp, len);
+ if (rc)
+ goto out;
+
+ ft->name = name;
+
+ rc = next_entry(buf, fp, sizeof(u32) * 4);
+ if (rc)
+ goto out;
+
+ ft->stype = le32_to_cpu(buf[0]);
+ ft->ttype = le32_to_cpu(buf[1]);
+ ft->tclass = le32_to_cpu(buf[2]);
+
+ otype->otype = le32_to_cpu(buf[3]);
+
+ rc = ebitmap_set_bit(&p->filename_trans_ttypes, ft->ttype, 1);
+ if (rc)
+ goto out;
+
+ rc = hashtab_insert(p->filename_trans, ft, otype);
+ if (rc) {
+ /*
+ * Do not return -EEXIST to the caller, or the system
+ * will not boot.
+ */
+ if (rc != -EEXIST)
+ goto out;
+ /* But free memory to avoid memory leak. */
+ kfree(ft);
+ kfree(name);
+ kfree(otype);
+ }
+ }
+ hash_eval(p->filename_trans, "filenametr");
+ return 0;
+out:
+ kfree(ft);
+ kfree(name);
+ kfree(otype);
+
+ return rc;
+}
+
+static int genfs_read(struct policydb *p, void *fp)
+{
+ int i, j, rc;
+ u32 nel, nel2, len, len2;
+ __le32 buf[1];
+ struct ocontext *l, *c;
+ struct ocontext *newc = NULL;
+ struct genfs *genfs_p, *genfs;
+ struct genfs *newgenfs = NULL;
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto out;
+ nel = le32_to_cpu(buf[0]);
+
+ for (i = 0; i < nel; i++) {
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto out;
+ len = le32_to_cpu(buf[0]);
+
+ rc = -ENOMEM;
+ newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
+ if (!newgenfs)
+ goto out;
+
+ rc = str_read(&newgenfs->fstype, GFP_KERNEL, fp, len);
+ if (rc)
+ goto out;
+
+ for (genfs_p = NULL, genfs = p->genfs; genfs;
+ genfs_p = genfs, genfs = genfs->next) {
+ rc = -EINVAL;
+ if (strcmp(newgenfs->fstype, genfs->fstype) == 0) {
+ printk(KERN_ERR "SELinux: dup genfs fstype %s\n",
+ newgenfs->fstype);
+ goto out;
+ }
+ if (strcmp(newgenfs->fstype, genfs->fstype) < 0)
+ break;
+ }
+ newgenfs->next = genfs;
+ if (genfs_p)
+ genfs_p->next = newgenfs;
+ else
+ p->genfs = newgenfs;
+ genfs = newgenfs;
+ newgenfs = NULL;
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto out;
+
+ nel2 = le32_to_cpu(buf[0]);
+ for (j = 0; j < nel2; j++) {
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto out;
+ len = le32_to_cpu(buf[0]);
+
+ rc = -ENOMEM;
+ newc = kzalloc(sizeof(*newc), GFP_KERNEL);
+ if (!newc)
+ goto out;
+
+ rc = str_read(&newc->u.name, GFP_KERNEL, fp, len);
+ if (rc)
+ goto out;
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto out;
+
+ newc->v.sclass = le32_to_cpu(buf[0]);
+ rc = context_read_and_validate(&newc->context[0], p, fp);
+ if (rc)
+ goto out;
+
+ for (l = NULL, c = genfs->head; c;
+ l = c, c = c->next) {
+ rc = -EINVAL;
+ if (!strcmp(newc->u.name, c->u.name) &&
+ (!c->v.sclass || !newc->v.sclass ||
+ newc->v.sclass == c->v.sclass)) {
+ printk(KERN_ERR "SELinux: dup genfs entry (%s,%s)\n",
+ genfs->fstype, c->u.name);
+ goto out;
+ }
+ len = strlen(newc->u.name);
+ len2 = strlen(c->u.name);
+ if (len > len2)
+ break;
+ }
+
+ newc->next = c;
+ if (l)
+ l->next = newc;
+ else
+ genfs->head = newc;
+ newc = NULL;
+ }
+ }
+ rc = 0;
+out:
+ if (newgenfs)
+ kfree(newgenfs->fstype);
+ kfree(newgenfs);
+ ocontext_destroy(newc, OCON_FSUSE);
+
+ return rc;
+}
+
+static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
+ void *fp)
+{
+ int i, j, rc;
+ u32 nel, len;
+ __le32 buf[3];
+ struct ocontext *l, *c;
+ u32 nodebuf[8];
+
+ for (i = 0; i < info->ocon_num; i++) {
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto out;
+ nel = le32_to_cpu(buf[0]);
+
+ l = NULL;
+ for (j = 0; j < nel; j++) {
+ rc = -ENOMEM;
+ c = kzalloc(sizeof(*c), GFP_KERNEL);
+ if (!c)
+ goto out;
+ if (l)
+ l->next = c;
+ else
+ p->ocontexts[i] = c;
+ l = c;
+
+ switch (i) {
+ case OCON_ISID:
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto out;
+
+ c->sid[0] = le32_to_cpu(buf[0]);
+ rc = context_read_and_validate(&c->context[0], p, fp);
+ if (rc)
+ goto out;
+ break;
+ case OCON_FS:
+ case OCON_NETIF:
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto out;
+ len = le32_to_cpu(buf[0]);
+
+ rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
+ if (rc)
+ goto out;
+
+ rc = context_read_and_validate(&c->context[0], p, fp);
+ if (rc)
+ goto out;
+ rc = context_read_and_validate(&c->context[1], p, fp);
+ if (rc)
+ goto out;
+ break;
+ case OCON_PORT:
+ rc = next_entry(buf, fp, sizeof(u32)*3);
+ if (rc)
+ goto out;
+ c->u.port.protocol = le32_to_cpu(buf[0]);
+ c->u.port.low_port = le32_to_cpu(buf[1]);
+ c->u.port.high_port = le32_to_cpu(buf[2]);
+ rc = context_read_and_validate(&c->context[0], p, fp);
+ if (rc)
+ goto out;
+ break;
+ case OCON_NODE:
+ rc = next_entry(nodebuf, fp, sizeof(u32) * 2);
+ if (rc)
+ goto out;
+ c->u.node.addr = nodebuf[0]; /* network order */
+ c->u.node.mask = nodebuf[1]; /* network order */
+ rc = context_read_and_validate(&c->context[0], p, fp);
+ if (rc)
+ goto out;
+ break;
+ case OCON_FSUSE:
+ rc = next_entry(buf, fp, sizeof(u32)*2);
+ if (rc)
+ goto out;
+
+ rc = -EINVAL;
+ c->v.behavior = le32_to_cpu(buf[0]);
+ /* Determined at runtime, not in policy DB. */
+ if (c->v.behavior == SECURITY_FS_USE_MNTPOINT)
+ goto out;
+ if (c->v.behavior > SECURITY_FS_USE_MAX)
+ goto out;
+
+ len = le32_to_cpu(buf[1]);
+ rc = str_read(&c->u.name, GFP_KERNEL, fp, len);
+ if (rc)
+ goto out;
+
+ rc = context_read_and_validate(&c->context[0], p, fp);
+ if (rc)
+ goto out;
+ break;
+ case OCON_NODE6: {
+ int k;
+
+ rc = next_entry(nodebuf, fp, sizeof(u32) * 8);
+ if (rc)
+ goto out;
+ for (k = 0; k < 4; k++)
+ c->u.node6.addr[k] = nodebuf[k];
+ for (k = 0; k < 4; k++)
+ c->u.node6.mask[k] = nodebuf[k+4];
+ rc = context_read_and_validate(&c->context[0], p, fp);
+ if (rc)
+ goto out;
+ break;
+ }
+ }
+ }
+ }
+ rc = 0;
+out:
+ return rc;
+}
+
+/*
+ * Read the configuration data from a policy database binary
+ * representation file into a policy database structure.
+ */
+int policydb_read(struct policydb *p, void *fp)
+{
+ struct role_allow *ra, *lra;
+ struct role_trans *tr, *ltr;
+ int i, j, rc;
+ __le32 buf[4];
+ u32 len, nprim, nel;
+
+ char *policydb_str;
+ struct policydb_compat_info *info;
+
+ rc = policydb_init(p);
+ if (rc)
+ return rc;
+
+ /* Read the magic number and string length. */
+ rc = next_entry(buf, fp, sizeof(u32) * 2);
+ if (rc)
+ goto bad;
+
+ rc = -EINVAL;
+ if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
+ printk(KERN_ERR "SELinux: policydb magic number 0x%x does "
+ "not match expected magic number 0x%x\n",
+ le32_to_cpu(buf[0]), POLICYDB_MAGIC);
+ goto bad;
+ }
+
+ rc = -EINVAL;
+ len = le32_to_cpu(buf[1]);
+ if (len != strlen(POLICYDB_STRING)) {
+ printk(KERN_ERR "SELinux: policydb string length %d does not "
+ "match expected length %Zu\n",
+ len, strlen(POLICYDB_STRING));
+ goto bad;
+ }
+
+ rc = -ENOMEM;
+ policydb_str = kmalloc(len + 1, GFP_KERNEL);
+ if (!policydb_str) {
+ printk(KERN_ERR "SELinux: unable to allocate memory for policydb "
+ "string of length %d\n", len);
+ goto bad;
+ }
+
+ rc = next_entry(policydb_str, fp, len);
+ if (rc) {
+ printk(KERN_ERR "SELinux: truncated policydb string identifier\n");
+ kfree(policydb_str);
+ goto bad;
+ }
+
+ rc = -EINVAL;
+ policydb_str[len] = '\0';
+ if (strcmp(policydb_str, POLICYDB_STRING)) {
+ printk(KERN_ERR "SELinux: policydb string %s does not match "
+ "my string %s\n", policydb_str, POLICYDB_STRING);
+ kfree(policydb_str);
+ goto bad;
+ }
+ /* Done with policydb_str. */
+ kfree(policydb_str);
+ policydb_str = NULL;
+
+ /* Read the version and table sizes. */
+ rc = next_entry(buf, fp, sizeof(u32)*4);
+ if (rc)
+ goto bad;
+
+ rc = -EINVAL;
+ p->policyvers = le32_to_cpu(buf[0]);
+ if (p->policyvers < POLICYDB_VERSION_MIN ||
+ p->policyvers > POLICYDB_VERSION_MAX) {
+ printk(KERN_ERR "SELinux: policydb version %d does not match "
+ "my version range %d-%d\n",
+ le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
+ goto bad;
+ }
+
+ if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
+ p->mls_enabled = 1;
+
+ rc = -EINVAL;
+ if (p->policyvers < POLICYDB_VERSION_MLS) {
+ printk(KERN_ERR "SELinux: security policydb version %d "
+ "(MLS) not backwards compatible\n",
+ p->policyvers);
+ goto bad;
+ }
+ }
+ p->reject_unknown = !!(le32_to_cpu(buf[1]) & REJECT_UNKNOWN);
+ p->allow_unknown = !!(le32_to_cpu(buf[1]) & ALLOW_UNKNOWN);
+
+ if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
+ rc = ebitmap_read(&p->policycaps, fp);
+ if (rc)
+ goto bad;
+ }
+
+ if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
+ rc = ebitmap_read(&p->permissive_map, fp);
+ if (rc)
+ goto bad;
+ }
+
+ rc = -EINVAL;
+ info = policydb_lookup_compat(p->policyvers);
+ if (!info) {
+ printk(KERN_ERR "SELinux: unable to find policy compat info "
+ "for version %d\n", p->policyvers);
+ goto bad;
+ }
+
+ rc = -EINVAL;
+ if (le32_to_cpu(buf[2]) != info->sym_num ||
+ le32_to_cpu(buf[3]) != info->ocon_num) {
+ printk(KERN_ERR "SELinux: policydb table sizes (%d,%d) do "
+ "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
+ le32_to_cpu(buf[3]),
+ info->sym_num, info->ocon_num);
+ goto bad;
+ }
+
+ for (i = 0; i < info->sym_num; i++) {
+ rc = next_entry(buf, fp, sizeof(u32)*2);
+ if (rc)
+ goto bad;
+ nprim = le32_to_cpu(buf[0]);
+ nel = le32_to_cpu(buf[1]);
+ for (j = 0; j < nel; j++) {
+ rc = read_f[i](p, p->symtab[i].table, fp);
+ if (rc)
+ goto bad;
+ }
+
+ p->symtab[i].nprim = nprim;
+ }
+
+ rc = -EINVAL;
+ p->process_class = string_to_security_class(p, "process");
+ if (!p->process_class)
+ goto bad;
+
+ rc = avtab_read(&p->te_avtab, fp, p);
+ if (rc)
+ goto bad;
+
+ if (p->policyvers >= POLICYDB_VERSION_BOOL) {
+ rc = cond_read_list(p, fp);
+ if (rc)
+ goto bad;
+ }
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto bad;
+ nel = le32_to_cpu(buf[0]);
+ ltr = NULL;
+ for (i = 0; i < nel; i++) {
+ rc = -ENOMEM;
+ tr = kzalloc(sizeof(*tr), GFP_KERNEL);
+ if (!tr)
+ goto bad;
+ if (ltr)
+ ltr->next = tr;
+ else
+ p->role_tr = tr;
+ rc = next_entry(buf, fp, sizeof(u32)*3);
+ if (rc)
+ goto bad;
+
+ rc = -EINVAL;
+ tr->role = le32_to_cpu(buf[0]);
+ tr->type = le32_to_cpu(buf[1]);
+ tr->new_role = le32_to_cpu(buf[2]);
+ if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto bad;
+ tr->tclass = le32_to_cpu(buf[0]);
+ } else
+ tr->tclass = p->process_class;
+
+ if (!policydb_role_isvalid(p, tr->role) ||
+ !policydb_type_isvalid(p, tr->type) ||
+ !policydb_class_isvalid(p, tr->tclass) ||
+ !policydb_role_isvalid(p, tr->new_role))
+ goto bad;
+ ltr = tr;
+ }
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto bad;
+ nel = le32_to_cpu(buf[0]);
+ lra = NULL;
+ for (i = 0; i < nel; i++) {
+ rc = -ENOMEM;
+ ra = kzalloc(sizeof(*ra), GFP_KERNEL);
+ if (!ra)
+ goto bad;
+ if (lra)
+ lra->next = ra;
+ else
+ p->role_allow = ra;
+ rc = next_entry(buf, fp, sizeof(u32)*2);
+ if (rc)
+ goto bad;
+
+ rc = -EINVAL;
+ ra->role = le32_to_cpu(buf[0]);
+ ra->new_role = le32_to_cpu(buf[1]);
+ if (!policydb_role_isvalid(p, ra->role) ||
+ !policydb_role_isvalid(p, ra->new_role))
+ goto bad;
+ lra = ra;
+ }
+
+ rc = filename_trans_read(p, fp);
+ if (rc)
+ goto bad;
+
+ rc = policydb_index(p);
+ if (rc)
+ goto bad;
+
+ rc = -EINVAL;
+ p->process_trans_perms = string_to_av_perm(p, p->process_class, "transition");
+ p->process_trans_perms |= string_to_av_perm(p, p->process_class, "dyntransition");
+ if (!p->process_trans_perms)
+ goto bad;
+
+ rc = ocontext_read(p, info, fp);
+ if (rc)
+ goto bad;
+
+ rc = genfs_read(p, fp);
+ if (rc)
+ goto bad;
+
+ rc = range_read(p, fp);
+ if (rc)
+ goto bad;
+
+ rc = -ENOMEM;
+ p->type_attr_map_array = flex_array_alloc(sizeof(struct ebitmap),
+ p->p_types.nprim,
+ GFP_KERNEL | __GFP_ZERO);
+ if (!p->type_attr_map_array)
+ goto bad;
+
+ /* preallocate so we don't have to worry about the put ever failing */
+ rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim,
+ GFP_KERNEL | __GFP_ZERO);
+ if (rc)
+ goto bad;
+
+ for (i = 0; i < p->p_types.nprim; i++) {
+ struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
+
+ BUG_ON(!e);
+ ebitmap_init(e);
+ if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
+ rc = ebitmap_read(e, fp);
+ if (rc)
+ goto bad;
+ }
+ /* add the type itself as the degenerate case */
+ rc = ebitmap_set_bit(e, i, 1);
+ if (rc)
+ goto bad;
+ }
+
+ rc = policydb_bounds_sanity_check(p);
+ if (rc)
+ goto bad;
+
+ rc = 0;
+out:
+ return rc;
+bad:
+ policydb_destroy(p);
+ goto out;
+}
+
+/*
+ * Write a MLS level structure to a policydb binary
+ * representation file.
+ */
+static int mls_write_level(struct mls_level *l, void *fp)
+{
+ __le32 buf[1];
+ int rc;
+
+ buf[0] = cpu_to_le32(l->sens);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+
+ rc = ebitmap_write(&l->cat, fp);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+/*
+ * Write a MLS range structure to a policydb binary
+ * representation file.
+ */
+static int mls_write_range_helper(struct mls_range *r, void *fp)
+{
+ __le32 buf[3];
+ size_t items;
+ int rc, eq;
+
+ eq = mls_level_eq(&r->level[1], &r->level[0]);
+
+ if (eq)
+ items = 2;
+ else
+ items = 3;
+ buf[0] = cpu_to_le32(items-1);
+ buf[1] = cpu_to_le32(r->level[0].sens);
+ if (!eq)
+ buf[2] = cpu_to_le32(r->level[1].sens);
+
+ BUG_ON(items > ARRAY_SIZE(buf));
+
+ rc = put_entry(buf, sizeof(u32), items, fp);
+ if (rc)
+ return rc;
+
+ rc = ebitmap_write(&r->level[0].cat, fp);
+ if (rc)
+ return rc;
+ if (!eq) {
+ rc = ebitmap_write(&r->level[1].cat, fp);
+ if (rc)
+ return rc;
+ }
+
+ return 0;
+}
+
+static int sens_write(void *vkey, void *datum, void *ptr)
+{
+ char *key = vkey;
+ struct level_datum *levdatum = datum;
+ struct policy_data *pd = ptr;
+ void *fp = pd->fp;
+ __le32 buf[2];
+ size_t len;
+ int rc;
+
+ len = strlen(key);
+ buf[0] = cpu_to_le32(len);
+ buf[1] = cpu_to_le32(levdatum->isalias);
+ rc = put_entry(buf, sizeof(u32), 2, fp);
+ if (rc)
+ return rc;
+
+ rc = put_entry(key, 1, len, fp);
+ if (rc)
+ return rc;
+
+ rc = mls_write_level(levdatum->level, fp);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int cat_write(void *vkey, void *datum, void *ptr)
+{
+ char *key = vkey;
+ struct cat_datum *catdatum = datum;
+ struct policy_data *pd = ptr;
+ void *fp = pd->fp;
+ __le32 buf[3];
+ size_t len;
+ int rc;
+
+ len = strlen(key);
+ buf[0] = cpu_to_le32(len);
+ buf[1] = cpu_to_le32(catdatum->value);
+ buf[2] = cpu_to_le32(catdatum->isalias);
+ rc = put_entry(buf, sizeof(u32), 3, fp);
+ if (rc)
+ return rc;
+
+ rc = put_entry(key, 1, len, fp);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int role_trans_write(struct policydb *p, void *fp)
+{
+ struct role_trans *r = p->role_tr;
+ struct role_trans *tr;
+ u32 buf[3];
+ size_t nel;
+ int rc;
+
+ nel = 0;
+ for (tr = r; tr; tr = tr->next)
+ nel++;
+ buf[0] = cpu_to_le32(nel);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+ for (tr = r; tr; tr = tr->next) {
+ buf[0] = cpu_to_le32(tr->role);
+ buf[1] = cpu_to_le32(tr->type);
+ buf[2] = cpu_to_le32(tr->new_role);
+ rc = put_entry(buf, sizeof(u32), 3, fp);
+ if (rc)
+ return rc;
+ if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
+ buf[0] = cpu_to_le32(tr->tclass);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+static int role_allow_write(struct role_allow *r, void *fp)
+{
+ struct role_allow *ra;
+ u32 buf[2];
+ size_t nel;
+ int rc;
+
+ nel = 0;
+ for (ra = r; ra; ra = ra->next)
+ nel++;
+ buf[0] = cpu_to_le32(nel);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+ for (ra = r; ra; ra = ra->next) {
+ buf[0] = cpu_to_le32(ra->role);
+ buf[1] = cpu_to_le32(ra->new_role);
+ rc = put_entry(buf, sizeof(u32), 2, fp);
+ if (rc)
+ return rc;
+ }
+ return 0;
+}
+
+/*
+ * Write a security context structure
+ * to a policydb binary representation file.
+ */
+static int context_write(struct policydb *p, struct context *c,
+ void *fp)
+{
+ int rc;
+ __le32 buf[3];
+
+ buf[0] = cpu_to_le32(c->user);
+ buf[1] = cpu_to_le32(c->role);
+ buf[2] = cpu_to_le32(c->type);
+
+ rc = put_entry(buf, sizeof(u32), 3, fp);
+ if (rc)
+ return rc;
+
+ rc = mls_write_range_helper(&c->range, fp);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+/*
+ * The following *_write functions are used to
+ * write the symbol data to a policy database
+ * binary representation file.
+ */
+
+static int perm_write(void *vkey, void *datum, void *fp)
+{
+ char *key = vkey;
+ struct perm_datum *perdatum = datum;
+ __le32 buf[2];
+ size_t len;
+ int rc;
+
+ len = strlen(key);
+ buf[0] = cpu_to_le32(len);
+ buf[1] = cpu_to_le32(perdatum->value);
+ rc = put_entry(buf, sizeof(u32), 2, fp);
+ if (rc)
+ return rc;
+
+ rc = put_entry(key, 1, len, fp);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int common_write(void *vkey, void *datum, void *ptr)
+{
+ char *key = vkey;
+ struct common_datum *comdatum = datum;
+ struct policy_data *pd = ptr;
+ void *fp = pd->fp;
+ __le32 buf[4];
+ size_t len;
+ int rc;
+
+ len = strlen(key);
+ buf[0] = cpu_to_le32(len);
+ buf[1] = cpu_to_le32(comdatum->value);
+ buf[2] = cpu_to_le32(comdatum->permissions.nprim);
+ buf[3] = cpu_to_le32(comdatum->permissions.table->nel);
+ rc = put_entry(buf, sizeof(u32), 4, fp);
+ if (rc)
+ return rc;
+
+ rc = put_entry(key, 1, len, fp);
+ if (rc)
+ return rc;
+
+ rc = hashtab_map(comdatum->permissions.table, perm_write, fp);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int type_set_write(struct type_set *t, void *fp)
+{
+ int rc;
+ __le32 buf[1];
+
+ if (ebitmap_write(&t->types, fp))
+ return -EINVAL;
+ if (ebitmap_write(&t->negset, fp))
+ return -EINVAL;
+
+ buf[0] = cpu_to_le32(t->flags);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int write_cons_helper(struct policydb *p, struct constraint_node *node,
+ void *fp)
+{
+ struct constraint_node *c;
+ struct constraint_expr *e;
+ __le32 buf[3];
+ u32 nel;
+ int rc;
+
+ for (c = node; c; c = c->next) {
+ nel = 0;
+ for (e = c->expr; e; e = e->next)
+ nel++;
+ buf[0] = cpu_to_le32(c->permissions);
+ buf[1] = cpu_to_le32(nel);
+ rc = put_entry(buf, sizeof(u32), 2, fp);
+ if (rc)
+ return rc;
+ for (e = c->expr; e; e = e->next) {
+ buf[0] = cpu_to_le32(e->expr_type);
+ buf[1] = cpu_to_le32(e->attr);
+ buf[2] = cpu_to_le32(e->op);
+ rc = put_entry(buf, sizeof(u32), 3, fp);
+ if (rc)
+ return rc;
+
+ switch (e->expr_type) {
+ case CEXPR_NAMES:
+ rc = ebitmap_write(&e->names, fp);
+ if (rc)
+ return rc;
+ if (p->policyvers >=
+ POLICYDB_VERSION_CONSTRAINT_NAMES) {
+ rc = type_set_write(e->type_names, fp);
+ if (rc)
+ return rc;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int class_write(void *vkey, void *datum, void *ptr)
+{
+ char *key = vkey;
+ struct class_datum *cladatum = datum;
+ struct policy_data *pd = ptr;
+ void *fp = pd->fp;
+ struct policydb *p = pd->p;
+ struct constraint_node *c;
+ __le32 buf[6];
+ u32 ncons;
+ size_t len, len2;
+ int rc;
+
+ len = strlen(key);
+ if (cladatum->comkey)
+ len2 = strlen(cladatum->comkey);
+ else
+ len2 = 0;
+
+ ncons = 0;
+ for (c = cladatum->constraints; c; c = c->next)
+ ncons++;
+
+ buf[0] = cpu_to_le32(len);
+ buf[1] = cpu_to_le32(len2);
+ buf[2] = cpu_to_le32(cladatum->value);
+ buf[3] = cpu_to_le32(cladatum->permissions.nprim);
+ if (cladatum->permissions.table)
+ buf[4] = cpu_to_le32(cladatum->permissions.table->nel);
+ else
+ buf[4] = 0;
+ buf[5] = cpu_to_le32(ncons);
+ rc = put_entry(buf, sizeof(u32), 6, fp);
+ if (rc)
+ return rc;
+
+ rc = put_entry(key, 1, len, fp);
+ if (rc)
+ return rc;
+
+ if (cladatum->comkey) {
+ rc = put_entry(cladatum->comkey, 1, len2, fp);
+ if (rc)
+ return rc;
+ }
+
+ rc = hashtab_map(cladatum->permissions.table, perm_write, fp);
+ if (rc)
+ return rc;
+
+ rc = write_cons_helper(p, cladatum->constraints, fp);
+ if (rc)
+ return rc;
+
+ /* write out the validatetrans rule */
+ ncons = 0;
+ for (c = cladatum->validatetrans; c; c = c->next)
+ ncons++;
+
+ buf[0] = cpu_to_le32(ncons);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+
+ rc = write_cons_helper(p, cladatum->validatetrans, fp);
+ if (rc)
+ return rc;
+
+ if (p->policyvers >= POLICYDB_VERSION_NEW_OBJECT_DEFAULTS) {
+ buf[0] = cpu_to_le32(cladatum->default_user);
+ buf[1] = cpu_to_le32(cladatum->default_role);
+ buf[2] = cpu_to_le32(cladatum->default_range);
+
+ rc = put_entry(buf, sizeof(uint32_t), 3, fp);
+ if (rc)
+ return rc;
+ }
+
+ if (p->policyvers >= POLICYDB_VERSION_DEFAULT_TYPE) {
+ buf[0] = cpu_to_le32(cladatum->default_type);
+ rc = put_entry(buf, sizeof(uint32_t), 1, fp);
+ if (rc)
+ return rc;
+ }
+
+ return 0;
+}
+
+static int role_write(void *vkey, void *datum, void *ptr)
+{
+ char *key = vkey;
+ struct role_datum *role = datum;
+ struct policy_data *pd = ptr;
+ void *fp = pd->fp;
+ struct policydb *p = pd->p;
+ __le32 buf[3];
+ size_t items, len;
+ int rc;
+
+ len = strlen(key);
+ items = 0;
+ buf[items++] = cpu_to_le32(len);
+ buf[items++] = cpu_to_le32(role->value);
+ if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
+ buf[items++] = cpu_to_le32(role->bounds);
+
+ BUG_ON(items > ARRAY_SIZE(buf));
+
+ rc = put_entry(buf, sizeof(u32), items, fp);
+ if (rc)
+ return rc;
+
+ rc = put_entry(key, 1, len, fp);
+ if (rc)
+ return rc;
+
+ rc = ebitmap_write(&role->dominates, fp);
+ if (rc)
+ return rc;
+
+ rc = ebitmap_write(&role->types, fp);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int type_write(void *vkey, void *datum, void *ptr)
+{
+ char *key = vkey;
+ struct type_datum *typdatum = datum;
+ struct policy_data *pd = ptr;
+ struct policydb *p = pd->p;
+ void *fp = pd->fp;
+ __le32 buf[4];
+ int rc;
+ size_t items, len;
+
+ len = strlen(key);
+ items = 0;
+ buf[items++] = cpu_to_le32(len);
+ buf[items++] = cpu_to_le32(typdatum->value);
+ if (p->policyvers >= POLICYDB_VERSION_BOUNDARY) {
+ u32 properties = 0;
+
+ if (typdatum->primary)
+ properties |= TYPEDATUM_PROPERTY_PRIMARY;
+
+ if (typdatum->attribute)
+ properties |= TYPEDATUM_PROPERTY_ATTRIBUTE;
+
+ buf[items++] = cpu_to_le32(properties);
+ buf[items++] = cpu_to_le32(typdatum->bounds);
+ } else {
+ buf[items++] = cpu_to_le32(typdatum->primary);
+ }
+ BUG_ON(items > ARRAY_SIZE(buf));
+ rc = put_entry(buf, sizeof(u32), items, fp);
+ if (rc)
+ return rc;
+
+ rc = put_entry(key, 1, len, fp);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int user_write(void *vkey, void *datum, void *ptr)
+{
+ char *key = vkey;
+ struct user_datum *usrdatum = datum;
+ struct policy_data *pd = ptr;
+ struct policydb *p = pd->p;
+ void *fp = pd->fp;
+ __le32 buf[3];
+ size_t items, len;
+ int rc;
+
+ len = strlen(key);
+ items = 0;
+ buf[items++] = cpu_to_le32(len);
+ buf[items++] = cpu_to_le32(usrdatum->value);
+ if (p->policyvers >= POLICYDB_VERSION_BOUNDARY)
+ buf[items++] = cpu_to_le32(usrdatum->bounds);
+ BUG_ON(items > ARRAY_SIZE(buf));
+ rc = put_entry(buf, sizeof(u32), items, fp);
+ if (rc)
+ return rc;
+
+ rc = put_entry(key, 1, len, fp);
+ if (rc)
+ return rc;
+
+ rc = ebitmap_write(&usrdatum->roles, fp);
+ if (rc)
+ return rc;
+
+ rc = mls_write_range_helper(&usrdatum->range, fp);
+ if (rc)
+ return rc;
+
+ rc = mls_write_level(&usrdatum->dfltlevel, fp);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int (*write_f[SYM_NUM]) (void *key, void *datum,
+ void *datap) =
+{
+ common_write,
+ class_write,
+ role_write,
+ type_write,
+ user_write,
+ cond_write_bool,
+ sens_write,
+ cat_write,
+};
+
+static int ocontext_write(struct policydb *p, struct policydb_compat_info *info,
+ void *fp)
+{
+ unsigned int i, j, rc;
+ size_t nel, len;
+ __le32 buf[3];
+ u32 nodebuf[8];
+ struct ocontext *c;
+ for (i = 0; i < info->ocon_num; i++) {
+ nel = 0;
+ for (c = p->ocontexts[i]; c; c = c->next)
+ nel++;
+ buf[0] = cpu_to_le32(nel);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+ for (c = p->ocontexts[i]; c; c = c->next) {
+ switch (i) {
+ case OCON_ISID:
+ buf[0] = cpu_to_le32(c->sid[0]);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+ rc = context_write(p, &c->context[0], fp);
+ if (rc)
+ return rc;
+ break;
+ case OCON_FS:
+ case OCON_NETIF:
+ len = strlen(c->u.name);
+ buf[0] = cpu_to_le32(len);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+ rc = put_entry(c->u.name, 1, len, fp);
+ if (rc)
+ return rc;
+ rc = context_write(p, &c->context[0], fp);
+ if (rc)
+ return rc;
+ rc = context_write(p, &c->context[1], fp);
+ if (rc)
+ return rc;
+ break;
+ case OCON_PORT:
+ buf[0] = cpu_to_le32(c->u.port.protocol);
+ buf[1] = cpu_to_le32(c->u.port.low_port);
+ buf[2] = cpu_to_le32(c->u.port.high_port);
+ rc = put_entry(buf, sizeof(u32), 3, fp);
+ if (rc)
+ return rc;
+ rc = context_write(p, &c->context[0], fp);
+ if (rc)
+ return rc;
+ break;
+ case OCON_NODE:
+ nodebuf[0] = c->u.node.addr; /* network order */
+ nodebuf[1] = c->u.node.mask; /* network order */
+ rc = put_entry(nodebuf, sizeof(u32), 2, fp);
+ if (rc)
+ return rc;
+ rc = context_write(p, &c->context[0], fp);
+ if (rc)
+ return rc;
+ break;
+ case OCON_FSUSE:
+ buf[0] = cpu_to_le32(c->v.behavior);
+ len = strlen(c->u.name);
+ buf[1] = cpu_to_le32(len);
+ rc = put_entry(buf, sizeof(u32), 2, fp);
+ if (rc)
+ return rc;
+ rc = put_entry(c->u.name, 1, len, fp);
+ if (rc)
+ return rc;
+ rc = context_write(p, &c->context[0], fp);
+ if (rc)
+ return rc;
+ break;
+ case OCON_NODE6:
+ for (j = 0; j < 4; j++)
+ nodebuf[j] = c->u.node6.addr[j]; /* network order */
+ for (j = 0; j < 4; j++)
+ nodebuf[j + 4] = c->u.node6.mask[j]; /* network order */
+ rc = put_entry(nodebuf, sizeof(u32), 8, fp);
+ if (rc)
+ return rc;
+ rc = context_write(p, &c->context[0], fp);
+ if (rc)
+ return rc;
+ break;
+ }
+ }
+ }
+ return 0;
+}
+
+static int genfs_write(struct policydb *p, void *fp)
+{
+ struct genfs *genfs;
+ struct ocontext *c;
+ size_t len;
+ __le32 buf[1];
+ int rc;
+
+ len = 0;
+ for (genfs = p->genfs; genfs; genfs = genfs->next)
+ len++;
+ buf[0] = cpu_to_le32(len);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+ for (genfs = p->genfs; genfs; genfs = genfs->next) {
+ len = strlen(genfs->fstype);
+ buf[0] = cpu_to_le32(len);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+ rc = put_entry(genfs->fstype, 1, len, fp);
+ if (rc)
+ return rc;
+ len = 0;
+ for (c = genfs->head; c; c = c->next)
+ len++;
+ buf[0] = cpu_to_le32(len);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+ for (c = genfs->head; c; c = c->next) {
+ len = strlen(c->u.name);
+ buf[0] = cpu_to_le32(len);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+ rc = put_entry(c->u.name, 1, len, fp);
+ if (rc)
+ return rc;
+ buf[0] = cpu_to_le32(c->v.sclass);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+ rc = context_write(p, &c->context[0], fp);
+ if (rc)
+ return rc;
+ }
+ }
+ return 0;
+}
+
+static int hashtab_cnt(void *key, void *data, void *ptr)
+{
+ int *cnt = ptr;
+ *cnt = *cnt + 1;
+
+ return 0;
+}
+
+static int range_write_helper(void *key, void *data, void *ptr)
+{
+ __le32 buf[2];
+ struct range_trans *rt = key;
+ struct mls_range *r = data;
+ struct policy_data *pd = ptr;
+ void *fp = pd->fp;
+ struct policydb *p = pd->p;
+ int rc;
+
+ buf[0] = cpu_to_le32(rt->source_type);
+ buf[1] = cpu_to_le32(rt->target_type);
+ rc = put_entry(buf, sizeof(u32), 2, fp);
+ if (rc)
+ return rc;
+ if (p->policyvers >= POLICYDB_VERSION_RANGETRANS) {
+ buf[0] = cpu_to_le32(rt->target_class);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+ }
+ rc = mls_write_range_helper(r, fp);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int range_write(struct policydb *p, void *fp)
+{
+ __le32 buf[1];
+ int rc, nel;
+ struct policy_data pd;
+
+ pd.p = p;
+ pd.fp = fp;
+
+ /* count the number of entries in the hashtab */
+ nel = 0;
+ rc = hashtab_map(p->range_tr, hashtab_cnt, &nel);
+ if (rc)
+ return rc;
+
+ buf[0] = cpu_to_le32(nel);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+
+ /* actually write all of the entries */
+ rc = hashtab_map(p->range_tr, range_write_helper, &pd);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int filename_write_helper(void *key, void *data, void *ptr)
+{
+ __le32 buf[4];
+ struct filename_trans *ft = key;
+ struct filename_trans_datum *otype = data;
+ void *fp = ptr;
+ int rc;
+ u32 len;
+
+ len = strlen(ft->name);
+ buf[0] = cpu_to_le32(len);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+
+ rc = put_entry(ft->name, sizeof(char), len, fp);
+ if (rc)
+ return rc;
+
+ buf[0] = cpu_to_le32(ft->stype);
+ buf[1] = cpu_to_le32(ft->ttype);
+ buf[2] = cpu_to_le32(ft->tclass);
+ buf[3] = cpu_to_le32(otype->otype);
+
+ rc = put_entry(buf, sizeof(u32), 4, fp);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+static int filename_trans_write(struct policydb *p, void *fp)
+{
+ u32 nel;
+ __le32 buf[1];
+ int rc;
+
+ if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
+ return 0;
+
+ nel = 0;
+ rc = hashtab_map(p->filename_trans, hashtab_cnt, &nel);
+ if (rc)
+ return rc;
+
+ buf[0] = cpu_to_le32(nel);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+
+ rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
+ if (rc)
+ return rc;
+
+ return 0;
+}
+
+/*
+ * Write the configuration data in a policy database
+ * structure to a policy database binary representation
+ * file.
+ */
+int policydb_write(struct policydb *p, void *fp)
+{
+ unsigned int i, num_syms;
+ int rc;
+ __le32 buf[4];
+ u32 config;
+ size_t len;
+ struct policydb_compat_info *info;
+
+ /*
+ * refuse to write policy older than compressed avtab
+ * to simplify the writer. There are other tests dropped
+ * since we assume this throughout the writer code. Be
+ * careful if you ever try to remove this restriction
+ */
+ if (p->policyvers < POLICYDB_VERSION_AVTAB) {
+ printk(KERN_ERR "SELinux: refusing to write policy version %d."
+ " Because it is less than version %d\n", p->policyvers,
+ POLICYDB_VERSION_AVTAB);
+ return -EINVAL;
+ }
+
+ config = 0;
+ if (p->mls_enabled)
+ config |= POLICYDB_CONFIG_MLS;
+
+ if (p->reject_unknown)
+ config |= REJECT_UNKNOWN;
+ if (p->allow_unknown)
+ config |= ALLOW_UNKNOWN;
+
+ /* Write the magic number and string identifiers. */
+ buf[0] = cpu_to_le32(POLICYDB_MAGIC);
+ len = strlen(POLICYDB_STRING);
+ buf[1] = cpu_to_le32(len);
+ rc = put_entry(buf, sizeof(u32), 2, fp);
+ if (rc)
+ return rc;
+ rc = put_entry(POLICYDB_STRING, 1, len, fp);
+ if (rc)
+ return rc;
+
+ /* Write the version, config, and table sizes. */
+ info = policydb_lookup_compat(p->policyvers);
+ if (!info) {
+ printk(KERN_ERR "SELinux: compatibility lookup failed for policy "
+ "version %d", p->policyvers);
+ return -EINVAL;
+ }
+
+ buf[0] = cpu_to_le32(p->policyvers);
+ buf[1] = cpu_to_le32(config);
+ buf[2] = cpu_to_le32(info->sym_num);
+ buf[3] = cpu_to_le32(info->ocon_num);
+
+ rc = put_entry(buf, sizeof(u32), 4, fp);
+ if (rc)
+ return rc;
+
+ if (p->policyvers >= POLICYDB_VERSION_POLCAP) {
+ rc = ebitmap_write(&p->policycaps, fp);
+ if (rc)
+ return rc;
+ }
+
+ if (p->policyvers >= POLICYDB_VERSION_PERMISSIVE) {
+ rc = ebitmap_write(&p->permissive_map, fp);
+ if (rc)
+ return rc;
+ }
+
+ num_syms = info->sym_num;
+ for (i = 0; i < num_syms; i++) {
+ struct policy_data pd;
+
+ pd.fp = fp;
+ pd.p = p;
+
+ buf[0] = cpu_to_le32(p->symtab[i].nprim);
+ buf[1] = cpu_to_le32(p->symtab[i].table->nel);
+
+ rc = put_entry(buf, sizeof(u32), 2, fp);
+ if (rc)
+ return rc;
+ rc = hashtab_map(p->symtab[i].table, write_f[i], &pd);
+ if (rc)
+ return rc;
+ }
+
+ rc = avtab_write(p, &p->te_avtab, fp);
+ if (rc)
+ return rc;
+
+ rc = cond_write_list(p, p->cond_list, fp);
+ if (rc)
+ return rc;
+
+ rc = role_trans_write(p, fp);
+ if (rc)
+ return rc;
+
+ rc = role_allow_write(p->role_allow, fp);
+ if (rc)
+ return rc;
+
+ rc = filename_trans_write(p, fp);
+ if (rc)
+ return rc;
+
+ rc = ocontext_write(p, info, fp);
+ if (rc)
+ return rc;
+
+ rc = genfs_write(p, fp);
+ if (rc)
+ return rc;
+
+ rc = range_write(p, fp);
+ if (rc)
+ return rc;
+
+ for (i = 0; i < p->p_types.nprim; i++) {
+ struct ebitmap *e = flex_array_get(p->type_attr_map_array, i);
+
+ BUG_ON(!e);
+ rc = ebitmap_write(e, fp);
+ if (rc)
+ return rc;
+ }
+
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff