* Author : Stephen Smalley, <sds@epoch.ncsc.mil>
*/
-/* Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
+/*
+ * 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
*
+ * 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
"roles",
"types",
"users",
- mls_symtab_names
- "bools"
+ "bools",
+ "levels",
+ "categories",
};
#endif
-int policydb_loaded_version;
+int selinux_mls_enabled = 0;
static unsigned int symtab_sizes[SYM_NUM] = {
2,
16,
512,
128,
- mls_symtab_sizes
- 16
+ 16,
+ 16,
+ 16,
};
struct policydb_compat_info {
static struct policydb_compat_info policydb_compat[] = {
{
.version = POLICYDB_VERSION_BASE,
- .sym_num = SYM_NUM - 1,
+ .sym_num = SYM_NUM - 3,
.ocon_num = OCON_NUM - 1,
},
{
.version = POLICYDB_VERSION_BOOL,
- .sym_num = SYM_NUM,
+ .sym_num = SYM_NUM - 2,
.ocon_num = OCON_NUM - 1,
},
{
.version = POLICYDB_VERSION_IPV6,
- .sym_num = SYM_NUM,
+ .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,
},
int i;
struct policydb_compat_info *info = NULL;
- for (i = 0; i < sizeof(policydb_compat)/sizeof(*info); i++) {
+ for (i = 0; i < ARRAY_SIZE(policydb_compat); i++) {
if (policydb_compat[i].version == version) {
info = &policydb_compat[i];
break;
/*
* Initialize the role table.
*/
-int roles_init(struct policydb *p)
+static int roles_init(struct policydb *p)
{
char *key = NULL;
int rc;
struct role_datum *role;
- role = kmalloc(sizeof(*role), GFP_KERNEL);
+ role = kzalloc(sizeof(*role), GFP_KERNEL);
if (!role) {
rc = -ENOMEM;
goto out;
}
- memset(role, 0, sizeof(*role));
role->value = ++p->p_roles.nprim;
if (role->value != OBJECT_R_VAL) {
rc = -EINVAL;
/*
* Initialize a policy database structure.
*/
-int policydb_init(struct policydb *p)
+static int policydb_init(struct policydb *p)
{
int i, rc;
return 0;
}
+static int sens_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct level_datum *levdatum;
+
+ levdatum = datum;
+ p = datap;
+
+ if (!levdatum->isalias) {
+ if (!levdatum->level->sens ||
+ levdatum->level->sens > p->p_levels.nprim)
+ return -EINVAL;
+ p->p_sens_val_to_name[levdatum->level->sens - 1] = key;
+ }
+
+ return 0;
+}
+
+static int cat_index(void *key, void *datum, void *datap)
+{
+ struct policydb *p;
+ struct cat_datum *catdatum;
+
+ catdatum = datum;
+ p = datap;
+
+ if (!catdatum->isalias) {
+ if (!catdatum->value || catdatum->value > p->p_cats.nprim)
+ return -EINVAL;
+ p->p_cat_val_to_name[catdatum->value - 1] = key;
+ }
+
+ return 0;
+}
+
static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
{
common_index,
role_index,
type_index,
user_index,
- mls_index_f
- cond_index_bool
+ cond_index_bool,
+ sens_index,
+ cat_index,
};
/*
*
* Caller must clean up upon failure.
*/
-int policydb_index_classes(struct policydb *p)
+static int policydb_index_classes(struct policydb *p)
{
int rc;
*
* Caller must clean up on failure.
*/
-int policydb_index_others(struct policydb *p)
+static int policydb_index_others(struct policydb *p)
{
int i, rc = 0;
printk(KERN_INFO "security: %d users, %d roles, %d types, %d bools",
p->p_users.nprim, p->p_roles.nprim, p->p_types.nprim, p->p_bools.nprim);
- mls_policydb_index_others(p);
+ if (selinux_mls_enabled)
+ printk(", %d sens, %d cats", p->p_levels.nprim,
+ p->p_cats.nprim);
printk("\n");
printk(KERN_INFO "security: %d classes, %d rules\n",
constraint = constraint->next;
kfree(ctemp);
}
+
+ constraint = cladatum->validatetrans;
+ while (constraint) {
+ e = constraint->expr;
+ while (e) {
+ ebitmap_destroy(&e->names);
+ etmp = e;
+ e = e->next;
+ kfree(etmp);
+ }
+ ctemp = constraint;
+ constraint = constraint->next;
+ kfree(ctemp);
+ }
+
kfree(cladatum->comkey);
kfree(datum);
return 0;
kfree(key);
usrdatum = datum;
ebitmap_destroy(&usrdatum->roles);
- mls_user_destroy(usrdatum);
+ 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);
+ 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;
}
role_destroy,
type_destroy,
user_destroy,
- mls_destroy_f
- cond_destroy_bool
+ cond_destroy_bool,
+ sens_destroy,
+ cat_destroy,
};
-void ocontext_destroy(struct ocontext *c, int i)
+static void ocontext_destroy(struct ocontext *c, int i)
{
context_destroy(&c->context[0]);
context_destroy(&c->context[1]);
struct ocontext *c, *ctmp;
struct genfs *g, *gtmp;
int i;
+ struct role_allow *ra, *lra = NULL;
+ struct role_trans *tr, *ltr = NULL;
+ struct range_trans *rt, *lrt = NULL;
for (i = 0; i < SYM_NUM; i++) {
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])
- kfree(p->sym_val_to_name[i]);
- }
+ for (i = 0; i < SYM_NUM; i++)
+ kfree(p->sym_val_to_name[i]);
- if (p->class_val_to_struct)
- kfree(p->class_val_to_struct);
- if (p->role_val_to_struct)
- kfree(p->role_val_to_struct);
- if (p->user_val_to_struct)
- kfree(p->user_val_to_struct);
+ kfree(p->class_val_to_struct);
+ kfree(p->role_val_to_struct);
+ kfree(p->user_val_to_struct);
avtab_destroy(&p->te_avtab);
cond_policydb_destroy(p);
+ for (tr = p->role_tr; tr; tr = tr->next) {
+ kfree(ltr);
+ ltr = tr;
+ }
+ kfree(ltr);
+
+ for (ra = p->role_allow; ra; ra = ra -> next) {
+ kfree(lra);
+ lra = ra;
+ }
+ kfree(lra);
+
+ for (rt = p->range_tr; rt; rt = rt -> next) {
+ kfree(lrt);
+ lrt = rt;
+ }
+ kfree(lrt);
+
+ if (p->type_attr_map) {
+ for (i = 0; i < p->p_types.nprim; i++)
+ ebitmap_destroy(&p->type_attr_map[i]);
+ }
+ kfree(p->type_attr_map);
+
return;
}
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 < 0)
+ goto out;
+
+ items = le32_to_cpu(buf[0]);
+ if (items > ARRAY_SIZE(buf)) {
+ printk(KERN_ERR "security: mls: range overflow\n");
+ rc = -EINVAL;
+ goto out;
+ }
+ rc = next_entry(buf, fp, sizeof(u32) * items);
+ if (rc < 0) {
+ printk(KERN_ERR "security: 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 "security: mls: error reading low "
+ "categories\n");
+ goto out;
+ }
+ if (items > 1) {
+ rc = ebitmap_read(&r->level[1].cat, fp);
+ if (rc) {
+ printk(KERN_ERR "security: 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 "security: mls: out of memory\n");
+ goto bad_high;
+ }
+ }
+
+ rc = 0;
+out:
+ return rc;
+bad_high:
+ ebitmap_destroy(&r->level[0].cat);
+ goto out;
+}
+
/*
* Read and validate a security context structure
* from a policydb binary representation file.
struct policydb *p,
void *fp)
{
- u32 *buf;
- int rc = 0;
+ __le32 buf[3];
+ int rc;
- buf = next_entry(fp, sizeof(u32)*3);
- if (!buf) {
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0) {
printk(KERN_ERR "security: context truncated\n");
- rc = -EINVAL;
goto out;
}
c->user = le32_to_cpu(buf[0]);
c->role = le32_to_cpu(buf[1]);
c->type = le32_to_cpu(buf[2]);
- if (mls_read_range(c, fp)) {
- printk(KERN_ERR "security: error reading MLS range of "
- "context\n");
- rc = -EINVAL;
- goto out;
+ if (p->policyvers >= POLICYDB_VERSION_MLS) {
+ if (mls_read_range_helper(&c->range, fp)) {
+ printk(KERN_ERR "security: error reading MLS range of "
+ "context\n");
+ rc = -EINVAL;
+ goto out;
+ }
}
if (!policydb_context_isvalid(p, c)) {
char *key = NULL;
struct perm_datum *perdatum;
int rc;
- u32 *buf, len;
+ __le32 buf[2];
+ u32 len;
- perdatum = kmalloc(sizeof(*perdatum), GFP_KERNEL);
+ perdatum = kzalloc(sizeof(*perdatum), GFP_KERNEL);
if (!perdatum) {
rc = -ENOMEM;
goto out;
}
- memset(perdatum, 0, sizeof(*perdatum));
- buf = next_entry(fp, sizeof(u32)*2);
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
goto bad;
- }
len = le32_to_cpu(buf[0]);
perdatum->value = le32_to_cpu(buf[1]);
- rc = mls_read_perm(perdatum, fp);
- if (rc)
- goto bad;
- buf = next_entry(fp, len);
- if (!buf) {
- rc = -EINVAL;
- goto bad;
- }
key = kmalloc(len + 1,GFP_KERNEL);
if (!key) {
rc = -ENOMEM;
goto bad;
}
- memcpy(key, buf, len);
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
key[len] = 0;
rc = hashtab_insert(h, key, perdatum);
{
char *key = NULL;
struct common_datum *comdatum;
- u32 *buf, len, nel;
+ __le32 buf[4];
+ u32 len, nel;
int i, rc;
- comdatum = kmalloc(sizeof(*comdatum), GFP_KERNEL);
+ comdatum = kzalloc(sizeof(*comdatum), GFP_KERNEL);
if (!comdatum) {
rc = -ENOMEM;
goto out;
}
- memset(comdatum, 0, sizeof(*comdatum));
- buf = next_entry(fp, sizeof(u32)*4);
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
goto bad;
- }
len = le32_to_cpu(buf[0]);
comdatum->value = le32_to_cpu(buf[1]);
comdatum->permissions.nprim = le32_to_cpu(buf[2]);
nel = le32_to_cpu(buf[3]);
- buf = next_entry(fp, len);
- if (!buf) {
- rc = -EINVAL;
- goto bad;
- }
key = kmalloc(len + 1,GFP_KERNEL);
if (!key) {
rc = -ENOMEM;
goto bad;
}
- memcpy(key, buf, len);
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
key[len] = 0;
for (i = 0; i < nel; i++) {
goto out;
}
+static int read_cons_helper(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 < 0)
+ 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 < 0)
+ 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++;
+ if (ebitmap_read(&e->names, fp))
+ return -EINVAL;
+ 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;
- struct constraint_node *c, *lc;
- struct constraint_expr *e, *le;
- u32 *buf, len, len2, ncons, nexpr, nel;
- int i, j, depth, rc;
+ __le32 buf[6];
+ u32 len, len2, ncons, nel;
+ int i, rc;
- cladatum = kmalloc(sizeof(*cladatum), GFP_KERNEL);
+ cladatum = kzalloc(sizeof(*cladatum), GFP_KERNEL);
if (!cladatum) {
rc = -ENOMEM;
- goto bad;
+ goto out;
}
- memset(cladatum, 0, sizeof(*cladatum));
- buf = next_entry(fp, sizeof(u32)*6);
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(buf, fp, sizeof(u32)*6);
+ if (rc < 0)
goto bad;
- }
len = le32_to_cpu(buf[0]);
len2 = le32_to_cpu(buf[1]);
ncons = le32_to_cpu(buf[5]);
- buf = next_entry(fp, len);
- if (!buf) {
- rc = -EINVAL;
- goto bad;
- }
key = kmalloc(len + 1,GFP_KERNEL);
if (!key) {
rc = -ENOMEM;
goto bad;
}
- memcpy(key, buf, len);
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
key[len] = 0;
if (len2) {
rc = -ENOMEM;
goto bad;
}
- buf = next_entry(fp, len2);
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(cladatum->comkey, fp, len2);
+ if (rc < 0)
goto bad;
- }
- memcpy(cladatum->comkey, buf, len2);
cladatum->comkey[len2] = 0;
cladatum->comdatum = hashtab_search(p->p_commons.table,
goto bad;
}
- lc = NULL;
- rc = -EINVAL;
- for (i = 0; i < ncons; i++) {
- c = kmalloc(sizeof(*c), GFP_KERNEL);
- if (!c) {
- rc = -ENOMEM;
- goto bad;
- }
- memset(c, 0, sizeof(*c));
-
- if (lc) {
- lc->next = c;
- } else {
- cladatum->constraints = c;
- }
+ rc = read_cons_helper(&cladatum->constraints, ncons, 0, fp);
+ if (rc)
+ goto bad;
- buf = next_entry(fp, sizeof(u32)*2);
- if (!buf)
+ if (p->policyvers >= POLICYDB_VERSION_VALIDATETRANS) {
+ /* grab the validatetrans rules */
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
goto bad;
- c->permissions = le32_to_cpu(buf[0]);
- nexpr = le32_to_cpu(buf[1]);
- le = NULL;
- depth = -1;
- for (j = 0; j < nexpr; j++) {
- e = kmalloc(sizeof(*e), GFP_KERNEL);
- if (!e) {
- rc = -ENOMEM;
- goto bad;
- }
- memset(e, 0, sizeof(*e));
-
- if (le) {
- le->next = e;
- } else {
- c->expr = e;
- }
-
- buf = next_entry(fp, sizeof(u32)*3);
- if (!buf)
- goto bad;
- 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)
- goto bad;
- break;
- case CEXPR_AND:
- case CEXPR_OR:
- if (depth < 1)
- goto bad;
- depth--;
- break;
- case CEXPR_ATTR:
- if (depth == (CEXPR_MAXDEPTH-1))
- goto bad;
- depth++;
- break;
- case CEXPR_NAMES:
- if (depth == (CEXPR_MAXDEPTH-1))
- goto bad;
- depth++;
- if (ebitmap_read(&e->names, fp))
- goto bad;
- break;
- default:
- goto bad;
- }
- le = e;
- }
- if (depth != 0)
+ ncons = le32_to_cpu(buf[0]);
+ rc = read_cons_helper(&cladatum->validatetrans, ncons, 1, fp);
+ if (rc)
goto bad;
- lc = c;
}
- rc = mls_read_class(cladatum, fp);
- if (rc)
- goto bad;
-
rc = hashtab_insert(h, key, cladatum);
if (rc)
goto bad;
+
+ rc = 0;
out:
return rc;
bad:
char *key = NULL;
struct role_datum *role;
int rc;
- u32 *buf, len;
+ __le32 buf[2];
+ u32 len;
- role = kmalloc(sizeof(*role), GFP_KERNEL);
+ role = kzalloc(sizeof(*role), GFP_KERNEL);
if (!role) {
rc = -ENOMEM;
goto out;
}
- memset(role, 0, sizeof(*role));
- buf = next_entry(fp, sizeof(u32)*2);
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
goto bad;
- }
len = le32_to_cpu(buf[0]);
role->value = le32_to_cpu(buf[1]);
- buf = next_entry(fp, len);
- if (!buf) {
- rc = -EINVAL;
- goto bad;
- }
key = kmalloc(len + 1,GFP_KERNEL);
if (!key) {
rc = -ENOMEM;
goto bad;
}
- memcpy(key, buf, len);
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
key[len] = 0;
rc = ebitmap_read(&role->dominates, fp);
char *key = NULL;
struct type_datum *typdatum;
int rc;
- u32 *buf, len;
+ __le32 buf[3];
+ u32 len;
- typdatum = kmalloc(sizeof(*typdatum),GFP_KERNEL);
+ typdatum = kzalloc(sizeof(*typdatum),GFP_KERNEL);
if (!typdatum) {
rc = -ENOMEM;
return rc;
}
- memset(typdatum, 0, sizeof(*typdatum));
- buf = next_entry(fp, sizeof(u32)*3);
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
goto bad;
- }
len = le32_to_cpu(buf[0]);
typdatum->value = le32_to_cpu(buf[1]);
typdatum->primary = le32_to_cpu(buf[2]);
- buf = next_entry(fp, len);
- if (!buf) {
- rc = -EINVAL;
- goto bad;
- }
key = kmalloc(len + 1,GFP_KERNEL);
if (!key) {
rc = -ENOMEM;
goto bad;
}
- memcpy(key, buf, len);
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
key[len] = 0;
rc = hashtab_insert(h, key, typdatum);
goto out;
}
+
+/*
+ * 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 < 0) {
+ printk(KERN_ERR "security: mls: truncated level\n");
+ goto bad;
+ }
+ lp->sens = le32_to_cpu(buf[0]);
+
+ if (ebitmap_read(&lp->cat, fp)) {
+ printk(KERN_ERR "security: mls: error reading level "
+ "categories\n");
+ goto bad;
+ }
+ return 0;
+
+bad:
+ return -EINVAL;
+}
+
static int user_read(struct policydb *p, struct hashtab *h, void *fp)
{
char *key = NULL;
struct user_datum *usrdatum;
int rc;
- u32 *buf, len;
-
+ __le32 buf[2];
+ u32 len;
- usrdatum = kmalloc(sizeof(*usrdatum), GFP_KERNEL);
+ usrdatum = kzalloc(sizeof(*usrdatum), GFP_KERNEL);
if (!usrdatum) {
rc = -ENOMEM;
goto out;
}
- memset(usrdatum, 0, sizeof(*usrdatum));
- buf = next_entry(fp, sizeof(u32)*2);
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
goto bad;
- }
len = le32_to_cpu(buf[0]);
usrdatum->value = le32_to_cpu(buf[1]);
- buf = next_entry(fp, len);
- if (!buf) {
- rc = -EINVAL;
- goto bad;
- }
key = kmalloc(len + 1,GFP_KERNEL);
if (!key) {
rc = -ENOMEM;
goto bad;
}
- memcpy(key, buf, len);
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
key[len] = 0;
rc = ebitmap_read(&usrdatum->roles, fp);
if (rc)
goto bad;
- rc = mls_read_user(usrdatum, 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 out;
}
+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;
+
+ levdatum = kzalloc(sizeof(*levdatum), GFP_ATOMIC);
+ if (!levdatum) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ levdatum->isalias = le32_to_cpu(buf[1]);
+
+ key = kmalloc(len + 1,GFP_ATOMIC);
+ if (!key) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
+ key[len] = 0;
+
+ levdatum->level = kmalloc(sizeof(struct mls_level), GFP_ATOMIC);
+ if (!levdatum->level) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ if (mls_read_level(levdatum->level, fp)) {
+ rc = -EINVAL;
+ goto bad;
+ }
+
+ rc = hashtab_insert(h, key, levdatum);
+ if (rc)
+ goto bad;
+out:
+ return rc;
+bad:
+ sens_destroy(key, levdatum, NULL);
+ goto out;
+}
+
+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;
+
+ catdatum = kzalloc(sizeof(*catdatum), GFP_ATOMIC);
+ if (!catdatum) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ rc = next_entry(buf, fp, sizeof buf);
+ if (rc < 0)
+ goto bad;
+
+ len = le32_to_cpu(buf[0]);
+ catdatum->value = le32_to_cpu(buf[1]);
+ catdatum->isalias = le32_to_cpu(buf[2]);
+
+ key = kmalloc(len + 1,GFP_ATOMIC);
+ if (!key) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ rc = next_entry(key, fp, len);
+ if (rc < 0)
+ goto bad;
+ key[len] = 0;
+
+ rc = hashtab_insert(h, key, catdatum);
+ if (rc)
+ goto bad;
+out:
+ return rc;
+
+bad:
+ cat_destroy(key, catdatum, NULL);
+ goto out;
+}
+
static int (*read_f[SYM_NUM]) (struct policydb *p, struct hashtab *h, void *fp) =
{
common_read,
role_read,
type_read,
user_read,
- mls_read_f
- cond_read_bool
+ cond_read_bool,
+ sens_read,
+ cat_read,
};
-#define mls_config(x) \
- ((x) & POLICYDB_CONFIG_MLS) ? "mls" : "no_mls"
+extern int ss_initialized;
/*
* Read the configuration data from a policy database binary
struct role_trans *tr, *ltr;
struct ocontext *l, *c, *newc;
struct genfs *genfs_p, *genfs, *newgenfs;
- int i, j, rc, r_policyvers = 0;
- u32 *buf, len, len2, config, nprim, nel, nel2;
+ int i, j, rc;
+ __le32 buf[8];
+ u32 len, len2, config, nprim, nel, nel2;
char *policydb_str;
struct policydb_compat_info *info;
+ struct range_trans *rt, *lrt;
config = 0;
- mls_set_config(config);
rc = policydb_init(p);
if (rc)
goto out;
- rc = -EINVAL;
/* Read the magic number and string length. */
- buf = next_entry(fp, sizeof(u32)* 2);
- if (!buf)
+ rc = next_entry(buf, fp, sizeof(u32)* 2);
+ if (rc < 0)
goto bad;
- for (i = 0; i < 2; i++)
- buf[i] = le32_to_cpu(buf[i]);
-
- if (buf[0] != POLICYDB_MAGIC) {
+ if (le32_to_cpu(buf[0]) != POLICYDB_MAGIC) {
printk(KERN_ERR "security: policydb magic number 0x%x does "
"not match expected magic number 0x%x\n",
- buf[0], POLICYDB_MAGIC);
+ le32_to_cpu(buf[0]), POLICYDB_MAGIC);
goto bad;
}
- len = buf[1];
+ len = le32_to_cpu(buf[1]);
if (len != strlen(POLICYDB_STRING)) {
printk(KERN_ERR "security: policydb string length %d does not "
"match expected length %Zu\n",
len, strlen(POLICYDB_STRING));
goto bad;
}
- buf = next_entry(fp, len);
- if (!buf) {
- printk(KERN_ERR "security: truncated policydb string identifier\n");
- goto bad;
- }
policydb_str = kmalloc(len + 1,GFP_KERNEL);
if (!policydb_str) {
printk(KERN_ERR "security: unable to allocate memory for policydb "
rc = -ENOMEM;
goto bad;
}
- memcpy(policydb_str, buf, len);
+ rc = next_entry(policydb_str, fp, len);
+ if (rc < 0) {
+ printk(KERN_ERR "security: truncated policydb string identifier\n");
+ kfree(policydb_str);
+ goto bad;
+ }
policydb_str[len] = 0;
if (strcmp(policydb_str, POLICYDB_STRING)) {
printk(KERN_ERR "security: policydb string %s does not match "
policydb_str = NULL;
/* Read the version, config, and table sizes. */
- buf = next_entry(fp, sizeof(u32)*4);
- if (!buf)
+ rc = next_entry(buf, fp, sizeof(u32)*4);
+ if (rc < 0)
goto bad;
- for (i = 0; i < 4; i++)
- buf[i] = le32_to_cpu(buf[i]);
- r_policyvers = buf[0];
- if (r_policyvers < POLICYDB_VERSION_MIN ||
- r_policyvers > POLICYDB_VERSION_MAX) {
+ p->policyvers = le32_to_cpu(buf[0]);
+ if (p->policyvers < POLICYDB_VERSION_MIN ||
+ p->policyvers > POLICYDB_VERSION_MAX) {
printk(KERN_ERR "security: policydb version %d does not match "
"my version range %d-%d\n",
- buf[0], POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
+ le32_to_cpu(buf[0]), POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
goto bad;
}
- if (buf[1] != config) {
- printk(KERN_ERR "security: policydb configuration (%s) does "
- "not match my configuration (%s)\n",
- mls_config(buf[1]),
- mls_config(config));
- goto bad;
- }
+ if ((le32_to_cpu(buf[1]) & POLICYDB_CONFIG_MLS)) {
+ if (ss_initialized && !selinux_mls_enabled) {
+ printk(KERN_ERR "Cannot switch between non-MLS and MLS "
+ "policies\n");
+ goto bad;
+ }
+ selinux_mls_enabled = 1;
+ config |= POLICYDB_CONFIG_MLS;
+ if (p->policyvers < POLICYDB_VERSION_MLS) {
+ printk(KERN_ERR "security policydb version %d (MLS) "
+ "not backwards compatible\n", p->policyvers);
+ goto bad;
+ }
+ } else {
+ if (ss_initialized && selinux_mls_enabled) {
+ printk(KERN_ERR "Cannot switch between MLS and non-MLS "
+ "policies\n");
+ goto bad;
+ }
+ }
- info = policydb_lookup_compat(r_policyvers);
+ info = policydb_lookup_compat(p->policyvers);
if (!info) {
printk(KERN_ERR "security: unable to find policy compat info "
- "for version %d\n", r_policyvers);
+ "for version %d\n", p->policyvers);
goto bad;
}
- if (buf[2] != info->sym_num || buf[3] != info->ocon_num) {
+ if (le32_to_cpu(buf[2]) != info->sym_num ||
+ le32_to_cpu(buf[3]) != info->ocon_num) {
printk(KERN_ERR "security: policydb table sizes (%d,%d) do "
- "not match mine (%d,%d)\n", buf[2], buf[3],
+ "not match mine (%d,%d)\n", le32_to_cpu(buf[2]),
+ le32_to_cpu(buf[3]),
info->sym_num, info->ocon_num);
goto bad;
}
- rc = mls_read_nlevels(p, fp);
- if (rc)
- goto bad;
-
for (i = 0; i < info->sym_num; i++) {
- buf = next_entry(fp, sizeof(u32)*2);
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(buf, fp, sizeof(u32)*2);
+ if (rc < 0)
goto bad;
- }
nprim = le32_to_cpu(buf[0]);
nel = le32_to_cpu(buf[1]);
for (j = 0; j < nel; j++) {
p->symtab[i].nprim = nprim;
}
- rc = avtab_read(&p->te_avtab, fp, config);
+ rc = avtab_read(&p->te_avtab, fp, p->policyvers);
if (rc)
goto bad;
- if (r_policyvers >= POLICYDB_VERSION_BOOL) {
+ if (p->policyvers >= POLICYDB_VERSION_BOOL) {
rc = cond_read_list(p, fp);
if (rc)
goto bad;
}
- buf = next_entry(fp, sizeof(u32));
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
goto bad;
- }
nel = le32_to_cpu(buf[0]);
ltr = NULL;
for (i = 0; i < nel; i++) {
- tr = kmalloc(sizeof(*tr), GFP_KERNEL);
+ tr = kzalloc(sizeof(*tr), GFP_KERNEL);
if (!tr) {
rc = -ENOMEM;
goto bad;
}
- memset(tr, 0, sizeof(*tr));
if (ltr) {
ltr->next = tr;
} else {
p->role_tr = tr;
}
- buf = next_entry(fp, sizeof(u32)*3);
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(buf, fp, sizeof(u32)*3);
+ if (rc < 0)
goto bad;
- }
tr->role = le32_to_cpu(buf[0]);
tr->type = le32_to_cpu(buf[1]);
tr->new_role = le32_to_cpu(buf[2]);
ltr = tr;
}
- buf = next_entry(fp, sizeof(u32));
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
goto bad;
- }
nel = le32_to_cpu(buf[0]);
lra = NULL;
for (i = 0; i < nel; i++) {
- ra = kmalloc(sizeof(*ra), GFP_KERNEL);
+ ra = kzalloc(sizeof(*ra), GFP_KERNEL);
if (!ra) {
rc = -ENOMEM;
goto bad;
}
- memset(ra, 0, sizeof(*ra));
if (lra) {
lra->next = ra;
} else {
p->role_allow = ra;
}
- buf = next_entry(fp, sizeof(u32)*2);
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(buf, fp, sizeof(u32)*2);
+ if (rc < 0)
goto bad;
- }
ra->role = le32_to_cpu(buf[0]);
ra->new_role = le32_to_cpu(buf[1]);
lra = ra;
goto bad;
for (i = 0; i < info->ocon_num; i++) {
- buf = next_entry(fp, sizeof(u32));
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
goto bad;
- }
nel = le32_to_cpu(buf[0]);
l = NULL;
for (j = 0; j < nel; j++) {
- c = kmalloc(sizeof(*c), GFP_KERNEL);
+ c = kzalloc(sizeof(*c), GFP_KERNEL);
if (!c) {
rc = -ENOMEM;
goto bad;
}
- memset(c, 0, sizeof(*c));
if (l) {
l->next = c;
} else {
rc = -EINVAL;
switch (i) {
case OCON_ISID:
- buf = next_entry(fp, sizeof(u32));
- if (!buf)
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
goto bad;
c->sid[0] = le32_to_cpu(buf[0]);
rc = context_read_and_validate(&c->context[0], p, fp);
break;
case OCON_FS:
case OCON_NETIF:
- buf = next_entry(fp, sizeof(u32));
- if (!buf)
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
goto bad;
len = le32_to_cpu(buf[0]);
- buf = next_entry(fp, len);
- if (!buf)
- goto bad;
c->u.name = kmalloc(len + 1,GFP_KERNEL);
if (!c->u.name) {
rc = -ENOMEM;
goto bad;
}
- memcpy(c->u.name, buf, len);
+ rc = next_entry(c->u.name, fp, len);
+ if (rc < 0)
+ goto bad;
c->u.name[len] = 0;
rc = context_read_and_validate(&c->context[0], p, fp);
if (rc)
goto bad;
break;
case OCON_PORT:
- buf = next_entry(fp, sizeof(u32)*3);
- if (!buf)
+ rc = next_entry(buf, fp, sizeof(u32)*3);
+ if (rc < 0)
goto bad;
c->u.port.protocol = le32_to_cpu(buf[0]);
c->u.port.low_port = le32_to_cpu(buf[1]);
goto bad;
break;
case OCON_NODE:
- buf = next_entry(fp, sizeof(u32)* 2);
- if (!buf)
+ rc = next_entry(buf, fp, sizeof(u32)* 2);
+ if (rc < 0)
goto bad;
c->u.node.addr = le32_to_cpu(buf[0]);
c->u.node.mask = le32_to_cpu(buf[1]);
goto bad;
break;
case OCON_FSUSE:
- buf = next_entry(fp, sizeof(u32)*2);
- if (!buf)
+ rc = next_entry(buf, fp, sizeof(u32)*2);
+ if (rc < 0)
goto bad;
c->v.behavior = le32_to_cpu(buf[0]);
if (c->v.behavior > SECURITY_FS_USE_NONE)
goto bad;
len = le32_to_cpu(buf[1]);
- buf = next_entry(fp, len);
- if (!buf)
- goto bad;
c->u.name = kmalloc(len + 1,GFP_KERNEL);
if (!c->u.name) {
rc = -ENOMEM;
goto bad;
}
- memcpy(c->u.name, buf, len);
+ rc = next_entry(c->u.name, fp, len);
+ if (rc < 0)
+ goto bad;
c->u.name[len] = 0;
rc = context_read_and_validate(&c->context[0], p, fp);
if (rc)
case OCON_NODE6: {
int k;
- buf = next_entry(fp, sizeof(u32) * 8);
- if (!buf)
+ rc = next_entry(buf, fp, sizeof(u32) * 8);
+ if (rc < 0)
goto bad;
for (k = 0; k < 4; k++)
c->u.node6.addr[k] = le32_to_cpu(buf[k]);
}
}
- buf = next_entry(fp, sizeof(u32));
- if (!buf) {
- rc = -EINVAL;
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
goto bad;
- }
nel = le32_to_cpu(buf[0]);
genfs_p = NULL;
rc = -EINVAL;
for (i = 0; i < nel; i++) {
- buf = next_entry(fp, sizeof(u32));
- if (!buf)
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
goto bad;
len = le32_to_cpu(buf[0]);
- buf = next_entry(fp, len);
- if (!buf)
- goto bad;
- newgenfs = kmalloc(sizeof(*newgenfs), GFP_KERNEL);
+ newgenfs = kzalloc(sizeof(*newgenfs), GFP_KERNEL);
if (!newgenfs) {
rc = -ENOMEM;
goto bad;
}
- memset(newgenfs, 0, sizeof(*newgenfs));
newgenfs->fstype = kmalloc(len + 1,GFP_KERNEL);
if (!newgenfs->fstype) {
kfree(newgenfs);
goto bad;
}
- memcpy(newgenfs->fstype, buf, len);
+ rc = next_entry(newgenfs->fstype, fp, len);
+ if (rc < 0) {
+ kfree(newgenfs->fstype);
+ kfree(newgenfs);
+ goto bad;
+ }
newgenfs->fstype[len] = 0;
for (genfs_p = NULL, genfs = p->genfs; genfs;
genfs_p = genfs, genfs = genfs->next) {
genfs_p->next = newgenfs;
else
p->genfs = newgenfs;
- buf = next_entry(fp, sizeof(u32));
- if (!buf)
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
goto bad;
nel2 = le32_to_cpu(buf[0]);
for (j = 0; j < nel2; j++) {
- buf = next_entry(fp, sizeof(u32));
- if (!buf)
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
goto bad;
len = le32_to_cpu(buf[0]);
- buf = next_entry(fp, len);
- if (!buf)
- goto bad;
- newc = kmalloc(sizeof(*newc), GFP_KERNEL);
+ newc = kzalloc(sizeof(*newc), GFP_KERNEL);
if (!newc) {
rc = -ENOMEM;
goto bad;
}
- memset(newc, 0, sizeof(*newc));
newc->u.name = kmalloc(len + 1,GFP_KERNEL);
if (!newc->u.name) {
rc = -ENOMEM;
goto bad_newc;
}
- memcpy(newc->u.name, buf, len);
+ rc = next_entry(newc->u.name, fp, len);
+ if (rc < 0)
+ goto bad_newc;
newc->u.name[len] = 0;
- buf = next_entry(fp, sizeof(u32));
- if (!buf)
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
goto bad_newc;
newc->v.sclass = le32_to_cpu(buf[0]);
if (context_read_and_validate(&newc->context[0], p, fp))
}
}
- rc = mls_read_trusted(p, fp);
- if (rc)
+ if (p->policyvers >= POLICYDB_VERSION_MLS) {
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc < 0)
+ goto bad;
+ nel = le32_to_cpu(buf[0]);
+ lrt = NULL;
+ for (i = 0; i < nel; i++) {
+ rt = kzalloc(sizeof(*rt), GFP_KERNEL);
+ if (!rt) {
+ rc = -ENOMEM;
+ goto bad;
+ }
+ if (lrt)
+ lrt->next = rt;
+ else
+ p->range_tr = rt;
+ rc = next_entry(buf, fp, (sizeof(u32) * 2));
+ if (rc < 0)
+ goto bad;
+ rt->dom = le32_to_cpu(buf[0]);
+ rt->type = le32_to_cpu(buf[1]);
+ rc = mls_read_range_helper(&rt->range, fp);
+ if (rc)
+ goto bad;
+ lrt = rt;
+ }
+ }
+
+ p->type_attr_map = kmalloc(p->p_types.nprim*sizeof(struct ebitmap), GFP_KERNEL);
+ if (!p->type_attr_map)
goto bad;
+
+ for (i = 0; i < p->p_types.nprim; i++) {
+ ebitmap_init(&p->type_attr_map[i]);
+ if (p->policyvers >= POLICYDB_VERSION_AVTAB) {
+ if (ebitmap_read(&p->type_attr_map[i], fp))
+ goto bad;
+ }
+ /* add the type itself as the degenerate case */
+ if (ebitmap_set_bit(&p->type_attr_map[i], i, 1))
+ goto bad;
+ }
+
+ rc = 0;
out:
- policydb_loaded_version = r_policyvers;
return rc;
bad_newc:
ocontext_destroy(newc,OCON_FSUSE);
bad:
+ if (!rc)
+ rc = -EINVAL;
policydb_destroy(p);
goto out;
}
git://git.onelab.eu / linux-2.6.git / blobdiff