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-rw-r--r--security/selinux/ss/conditional.c6
-rw-r--r--security/selinux/ss/mls.c25
-rw-r--r--security/selinux/ss/policydb.c109
-rw-r--r--security/selinux/ss/policydb.h17
-rw-r--r--security/selinux/ss/services.c38
5 files changed, 127 insertions, 68 deletions
diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index 655fe1c6cc69..c3f845cbcd48 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -193,6 +193,7 @@ int cond_index_bool(void *key, void *datum, void *datap)
{
struct policydb *p;
struct cond_bool_datum *booldatum;
+ struct flex_array *fa;
booldatum = datum;
p = datap;
@@ -200,7 +201,10 @@ int cond_index_bool(void *key, void *datum, void *datap)
if (!booldatum->value || booldatum->value > p->p_bools.nprim)
return -EINVAL;
- p->p_bool_val_to_name[booldatum->value - 1] = key;
+ fa = p->sym_val_to_name[SYM_BOOLS];
+ if (flex_array_put_ptr(fa, booldatum->value - 1, key,
+ GFP_KERNEL | __GFP_ZERO))
+ BUG();
p->bool_val_to_struct[booldatum->value - 1] = booldatum;
return 0;
diff --git a/security/selinux/ss/mls.c b/security/selinux/ss/mls.c
index b4eff7a60c50..1ef8e4e89880 100644
--- a/security/selinux/ss/mls.c
+++ b/security/selinux/ss/mls.c
@@ -45,7 +45,7 @@ int mls_compute_context_len(struct context *context)
len = 1; /* for the beginning ":" */
for (l = 0; l < 2; l++) {
int index_sens = context->range.level[l].sens;
- len += strlen(policydb.p_sens_val_to_name[index_sens - 1]);
+ len += strlen(sym_name(&policydb, SYM_LEVELS, index_sens - 1));
/* categories */
head = -2;
@@ -55,17 +55,17 @@ int mls_compute_context_len(struct context *context)
if (i - prev > 1) {
/* one or more negative bits are skipped */
if (head != prev) {
- nm = policydb.p_cat_val_to_name[prev];
+ nm = sym_name(&policydb, SYM_CATS, prev);
len += strlen(nm) + 1;
}
- nm = policydb.p_cat_val_to_name[i];
+ nm = sym_name(&policydb, SYM_CATS, i);
len += strlen(nm) + 1;
head = i;
}
prev = i;
}
if (prev != head) {
- nm = policydb.p_cat_val_to_name[prev];
+ nm = sym_name(&policydb, SYM_CATS, prev);
len += strlen(nm) + 1;
}
if (l == 0) {
@@ -102,8 +102,8 @@ void mls_sid_to_context(struct context *context,
scontextp++;
for (l = 0; l < 2; l++) {
- strcpy(scontextp,
- policydb.p_sens_val_to_name[context->range.level[l].sens - 1]);
+ strcpy(scontextp, sym_name(&policydb, SYM_LEVELS,
+ context->range.level[l].sens - 1));
scontextp += strlen(scontextp);
/* categories */
@@ -118,7 +118,7 @@ void mls_sid_to_context(struct context *context,
*scontextp++ = '.';
else
*scontextp++ = ',';
- nm = policydb.p_cat_val_to_name[prev];
+ nm = sym_name(&policydb, SYM_CATS, prev);
strcpy(scontextp, nm);
scontextp += strlen(nm);
}
@@ -126,7 +126,7 @@ void mls_sid_to_context(struct context *context,
*scontextp++ = ':';
else
*scontextp++ = ',';
- nm = policydb.p_cat_val_to_name[i];
+ nm = sym_name(&policydb, SYM_CATS, i);
strcpy(scontextp, nm);
scontextp += strlen(nm);
head = i;
@@ -139,7 +139,7 @@ void mls_sid_to_context(struct context *context,
*scontextp++ = '.';
else
*scontextp++ = ',';
- nm = policydb.p_cat_val_to_name[prev];
+ nm = sym_name(&policydb, SYM_CATS, prev);
strcpy(scontextp, nm);
scontextp += strlen(nm);
}
@@ -166,7 +166,7 @@ int mls_level_isvalid(struct policydb *p, struct mls_level *l)
if (!l->sens || l->sens > p->p_levels.nprim)
return 0;
levdatum = hashtab_search(p->p_levels.table,
- p->p_sens_val_to_name[l->sens - 1]);
+ sym_name(p, SYM_LEVELS, l->sens - 1));
if (!levdatum)
return 0;
@@ -482,7 +482,8 @@ int mls_convert_context(struct policydb *oldp,
for (l = 0; l < 2; l++) {
levdatum = hashtab_search(newp->p_levels.table,
- oldp->p_sens_val_to_name[c->range.level[l].sens - 1]);
+ sym_name(oldp, SYM_LEVELS,
+ c->range.level[l].sens - 1));
if (!levdatum)
return -EINVAL;
@@ -493,7 +494,7 @@ int mls_convert_context(struct policydb *oldp,
int rc;
catdatum = hashtab_search(newp->p_cats.table,
- oldp->p_cat_val_to_name[i]);
+ sym_name(oldp, SYM_CATS, i));
if (!catdatum)
return -EINVAL;
rc = ebitmap_set_bit(&bitmap, catdatum->value - 1, 1);
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index af41fdfe1a71..5adca670e5af 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -254,12 +254,17 @@ 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;
- p->p_common_val_to_name[comdatum->value - 1] = key;
+
+ 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;
}
@@ -267,12 +272,16 @@ 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;
- p->p_class_val_to_name[cladatum->value - 1] = key;
+ 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;
}
@@ -281,6 +290,7 @@ 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;
@@ -288,7 +298,11 @@ static int role_index(void *key, void *datum, void *datap)
|| role->value > p->p_roles.nprim
|| role->bounds > p->p_roles.nprim)
return -EINVAL;
- p->p_role_val_to_name[role->value - 1] = key;
+
+ 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;
}
@@ -297,6 +311,7 @@ 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;
@@ -306,10 +321,13 @@ static int type_index(void *key, void *datum, void *datap)
|| typdatum->value > p->p_types.nprim
|| typdatum->bounds > p->p_types.nprim)
return -EINVAL;
- p->p_type_val_to_name[typdatum->value - 1] = key;
- /* this flex array was all preallocated, this cannot fail */
- if (flex_array_put_ptr(p->type_val_to_struct_array,
- typdatum->value - 1, typdatum,
+ 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();
}
@@ -321,6 +339,7 @@ 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;
@@ -328,7 +347,11 @@ static int user_index(void *key, void *datum, void *datap)
|| usrdatum->value > p->p_users.nprim
|| usrdatum->bounds > p->p_users.nprim)
return -EINVAL;
- p->p_user_val_to_name[usrdatum->value - 1] = key;
+
+ 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;
}
@@ -337,6 +360,7 @@ 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;
@@ -345,7 +369,10 @@ static int sens_index(void *key, void *datum, void *datap)
if (!levdatum->level->sens ||
levdatum->level->sens > p->p_levels.nprim)
return -EINVAL;
- p->p_sens_val_to_name[levdatum->level->sens - 1] = key;
+ 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;
@@ -355,6 +382,7 @@ 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;
@@ -362,7 +390,10 @@ static int cat_index(void *key, void *datum, void *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;
+ 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;
@@ -392,9 +423,16 @@ static int policydb_index_classes(struct policydb *p)
int rc;
rc = -ENOMEM;
- p->p_common_val_to_name =
- kmalloc(p->p_commons.nprim * sizeof(char *), GFP_KERNEL);
- if (!p->p_common_val_to_name)
+ p->sym_val_to_name[SYM_COMMONS] = flex_array_alloc(sizeof(char *),
+ p->p_commons.nprim,
+ GFP_KERNEL | __GFP_ZERO);
+ if (!p->sym_val_to_name[SYM_COMMONS])
+ goto out;
+
+ rc = flex_array_prealloc(p->sym_val_to_name[SYM_COMMONS],
+ 0, p->p_commons.nprim - 1,
+ GFP_KERNEL | __GFP_ZERO);
+ if (rc)
goto out;
rc = hashtab_map(p->p_commons.table, common_index, p);
@@ -408,9 +446,16 @@ static int policydb_index_classes(struct policydb *p)
goto out;
rc = -ENOMEM;
- p->p_class_val_to_name =
- kmalloc(p->p_classes.nprim * sizeof(char *), GFP_KERNEL);
- if (!p->p_class_val_to_name)
+ p->sym_val_to_name[SYM_CLASSES] = flex_array_alloc(sizeof(char *),
+ p->p_classes.nprim,
+ GFP_KERNEL | __GFP_ZERO);
+ if (!p->sym_val_to_name[SYM_CLASSES])
+ goto out;
+
+ rc = flex_array_prealloc(p->sym_val_to_name[SYM_CLASSES],
+ 0, p->p_classes.nprim - 1,
+ GFP_KERNEL | __GFP_ZERO);
+ if (rc)
goto out;
rc = hashtab_map(p->p_classes.table, class_index, p);
@@ -507,10 +552,18 @@ static int policydb_index_others(struct policydb *p)
for (i = SYM_ROLES; i < SYM_NUM; i++) {
rc = -ENOMEM;
- p->sym_val_to_name[i] =
- kmalloc(p->symtab[i].nprim * sizeof(char *), GFP_KERNEL);
+ 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 - 1,
+ GFP_KERNEL | __GFP_ZERO);
+ if (rc)
+ goto out;
+
rc = hashtab_map(p->symtab[i].table, index_f[i], p);
if (rc)
goto out;
@@ -703,8 +756,10 @@ void policydb_destroy(struct policydb *p)
hashtab_destroy(p->symtab[i].table);
}
- for (i = 0; i < SYM_NUM; i++)
- kfree(p->sym_val_to_name[i]);
+ 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);
@@ -1566,9 +1621,9 @@ static int user_bounds_sanity_check(void *key, void *datum, void *datap)
printk(KERN_ERR
"SELinux: boundary violated policy: "
"user=%s role=%s bounds=%s\n",
- p->p_user_val_to_name[user->value - 1],
- p->p_role_val_to_name[bit],
- p->p_user_val_to_name[upper->value - 1]);
+ sym_name(p, SYM_USERS, user->value - 1),
+ sym_name(p, SYM_ROLES, bit),
+ sym_name(p, SYM_USERS, upper->value - 1));
return -EINVAL;
}
@@ -1603,9 +1658,9 @@ static int role_bounds_sanity_check(void *key, void *datum, void *datap)
printk(KERN_ERR
"SELinux: boundary violated policy: "
"role=%s type=%s bounds=%s\n",
- p->p_role_val_to_name[role->value - 1],
- p->p_type_val_to_name[bit],
- p->p_role_val_to_name[upper->value - 1]);
+ sym_name(p, SYM_ROLES, role->value - 1),
+ sym_name(p, SYM_TYPES, bit),
+ sym_name(p, SYM_ROLES, upper->value - 1));
return -EINVAL;
}
@@ -1637,7 +1692,7 @@ static int type_bounds_sanity_check(void *key, void *datum, void *datap)
printk(KERN_ERR "SELinux: type %s: "
"bounded by attribute %s",
(char *) key,
- p->p_type_val_to_name[upper->value - 1]);
+ sym_name(p, SYM_TYPES, upper->value - 1));
return -EINVAL;
}
}
diff --git a/security/selinux/ss/policydb.h b/security/selinux/ss/policydb.h
index 9826a92a6b0c..4e3ab9d0b315 100644
--- a/security/selinux/ss/policydb.h
+++ b/security/selinux/ss/policydb.h
@@ -203,15 +203,7 @@ struct policydb {
#define p_cats symtab[SYM_CATS]
/* symbol names indexed by (value - 1) */
- char **sym_val_to_name[SYM_NUM];
-#define p_common_val_to_name sym_val_to_name[SYM_COMMONS]
-#define p_class_val_to_name sym_val_to_name[SYM_CLASSES]
-#define p_role_val_to_name sym_val_to_name[SYM_ROLES]
-#define p_type_val_to_name sym_val_to_name[SYM_TYPES]
-#define p_user_val_to_name sym_val_to_name[SYM_USERS]
-#define p_bool_val_to_name sym_val_to_name[SYM_BOOLS]
-#define p_sens_val_to_name sym_val_to_name[SYM_LEVELS]
-#define p_cat_val_to_name sym_val_to_name[SYM_CATS]
+ struct flex_array *sym_val_to_name[SYM_NUM];
/* class, role, and user attributes indexed by (value - 1) */
struct class_datum **class_val_to_struct;
@@ -321,6 +313,13 @@ static inline int put_entry(void *buf, size_t bytes, int num, struct policy_file
return 0;
}
+static inline char *sym_name(struct policydb *p, unsigned int sym_num, unsigned int element_nr)
+{
+ struct flex_array *fa = p->sym_val_to_name[sym_num];
+
+ return flex_array_get_ptr(fa, element_nr);
+}
+
extern u16 string_to_security_class(struct policydb *p, const char *name);
extern u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name);
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index afcbc19817f7..a03cfaf0ee07 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -464,7 +464,7 @@ static void security_dump_masked_av(struct context *scontext,
if (!permissions)
return;
- tclass_name = policydb.p_class_val_to_name[tclass - 1];
+ tclass_name = sym_name(&policydb, SYM_CLASSES, tclass - 1);
tclass_dat = policydb.class_val_to_struct[tclass - 1];
common_dat = tclass_dat->comdatum;
@@ -716,7 +716,7 @@ static int security_validtrans_handle_fail(struct context *ocontext,
audit_log(current->audit_context, GFP_ATOMIC, AUDIT_SELINUX_ERR,
"security_validate_transition: denied for"
" oldcontext=%s newcontext=%s taskcontext=%s tclass=%s",
- o, n, t, policydb.p_class_val_to_name[tclass-1]);
+ o, n, t, sym_name(&policydb, SYM_CLASSES, tclass-1));
out:
kfree(o);
kfree(n);
@@ -1012,9 +1012,9 @@ static int context_struct_to_string(struct context *context, char **scontext, u3
}
/* Compute the size of the context. */
- *scontext_len += strlen(policydb.p_user_val_to_name[context->user - 1]) + 1;
- *scontext_len += strlen(policydb.p_role_val_to_name[context->role - 1]) + 1;
- *scontext_len += strlen(policydb.p_type_val_to_name[context->type - 1]) + 1;
+ *scontext_len += strlen(sym_name(&policydb, SYM_USERS, context->user - 1)) + 1;
+ *scontext_len += strlen(sym_name(&policydb, SYM_ROLES, context->role - 1)) + 1;
+ *scontext_len += strlen(sym_name(&policydb, SYM_TYPES, context->type - 1)) + 1;
*scontext_len += mls_compute_context_len(context);
if (!scontext)
@@ -1030,12 +1030,12 @@ static int context_struct_to_string(struct context *context, char **scontext, u3
* Copy the user name, role name and type name into the context.
*/
sprintf(scontextp, "%s:%s:%s",
- policydb.p_user_val_to_name[context->user - 1],
- policydb.p_role_val_to_name[context->role - 1],
- policydb.p_type_val_to_name[context->type - 1]);
- scontextp += strlen(policydb.p_user_val_to_name[context->user - 1]) +
- 1 + strlen(policydb.p_role_val_to_name[context->role - 1]) +
- 1 + strlen(policydb.p_type_val_to_name[context->type - 1]);
+ sym_name(&policydb, SYM_USERS, context->user - 1),
+ sym_name(&policydb, SYM_ROLES, context->role - 1),
+ sym_name(&policydb, SYM_TYPES, context->type - 1));
+ scontextp += strlen(sym_name(&policydb, SYM_USERS, context->user - 1)) +
+ 1 + strlen(sym_name(&policydb, SYM_ROLES, context->role - 1)) +
+ 1 + strlen(sym_name(&policydb, SYM_TYPES, context->type - 1));
mls_sid_to_context(context, &scontextp);
@@ -1333,7 +1333,7 @@ static int compute_sid_handle_invalid_context(
" for scontext=%s"
" tcontext=%s"
" tclass=%s",
- n, s, t, policydb.p_class_val_to_name[tclass-1]);
+ n, s, t, sym_name(&policydb, SYM_CLASSES, tclass-1));
out:
kfree(s);
kfree(t);
@@ -1654,7 +1654,7 @@ static int convert_context(u32 key,
/* Convert the user. */
rc = -EINVAL;
usrdatum = hashtab_search(args->newp->p_users.table,
- args->oldp->p_user_val_to_name[c->user - 1]);
+ sym_name(args->oldp, SYM_USERS, c->user - 1));
if (!usrdatum)
goto bad;
c->user = usrdatum->value;
@@ -1662,7 +1662,7 @@ static int convert_context(u32 key,
/* Convert the role. */
rc = -EINVAL;
role = hashtab_search(args->newp->p_roles.table,
- args->oldp->p_role_val_to_name[c->role - 1]);
+ sym_name(args->oldp, SYM_ROLES, c->role - 1));
if (!role)
goto bad;
c->role = role->value;
@@ -1670,7 +1670,7 @@ static int convert_context(u32 key,
/* Convert the type. */
rc = -EINVAL;
typdatum = hashtab_search(args->newp->p_types.table,
- args->oldp->p_type_val_to_name[c->type - 1]);
+ sym_name(args->oldp, SYM_TYPES, c->type - 1));
if (!typdatum)
goto bad;
c->type = typdatum->value;
@@ -2326,14 +2326,14 @@ int security_get_bools(int *len, char ***names, int **values)
size_t name_len;
(*values)[i] = policydb.bool_val_to_struct[i]->state;
- name_len = strlen(policydb.p_bool_val_to_name[i]) + 1;
+ name_len = strlen(sym_name(&policydb, SYM_BOOLS, i)) + 1;
rc = -ENOMEM;
(*names)[i] = kmalloc(sizeof(char) * name_len, GFP_ATOMIC);
if (!(*names)[i])
goto err;
- strncpy((*names)[i], policydb.p_bool_val_to_name[i], name_len);
+ strncpy((*names)[i], sym_name(&policydb, SYM_BOOLS, i), name_len);
(*names)[i][name_len - 1] = 0;
}
rc = 0;
@@ -2368,7 +2368,7 @@ int security_set_bools(int len, int *values)
audit_log(current->audit_context, GFP_ATOMIC,
AUDIT_MAC_CONFIG_CHANGE,
"bool=%s val=%d old_val=%d auid=%u ses=%u",
- policydb.p_bool_val_to_name[i],
+ sym_name(&policydb, SYM_BOOLS, i),
!!values[i],
policydb.bool_val_to_struct[i]->state,
audit_get_loginuid(current),
@@ -3132,7 +3132,7 @@ int security_netlbl_sid_to_secattr(u32 sid, struct netlbl_lsm_secattr *secattr)
goto out;
rc = -ENOMEM;
- secattr->domain = kstrdup(policydb.p_type_val_to_name[ctx->type - 1],
+ secattr->domain = kstrdup(sym_name(&policydb, SYM_TYPES, ctx->type - 1),
GFP_ATOMIC);
if (secattr->domain == NULL)
goto out;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 05:12:14 +0000