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-rw-r--r--security/selinux/ss/avtab.h23
-rw-r--r--security/selinux/ss/conditional.c4
-rw-r--r--security/selinux/ss/conditional.h1
-rw-r--r--security/selinux/ss/constraint.h1
-rw-r--r--security/selinux/ss/context.h20
-rw-r--r--security/selinux/ss/ebitmap.c22
-rw-r--r--security/selinux/ss/ebitmap.h11
-rw-r--r--security/selinux/ss/hashtab.c3
-rw-r--r--security/selinux/ss/mls.c55
-rw-r--r--security/selinux/ss/mls.h5
-rw-r--r--security/selinux/ss/mls_types.h2
-rw-r--r--security/selinux/ss/policydb.c445
-rw-r--r--security/selinux/ss/policydb.h47
-rw-r--r--security/selinux/ss/services.c273
14 files changed, 727 insertions, 185 deletions
diff --git a/security/selinux/ss/avtab.h b/security/selinux/ss/avtab.h
index dff0c75345c..63ce2f9e441 100644
--- a/security/selinux/ss/avtab.h
+++ b/security/selinux/ss/avtab.h
@@ -14,7 +14,7 @@
*
* Copyright (C) 2003 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
+ * it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2.
*
* Updated: Yuichi Nakamura <ynakam@hitachisoft.jp>
@@ -27,16 +27,16 @@ struct avtab_key {
u16 source_type; /* source type */
u16 target_type; /* target type */
u16 target_class; /* target object class */
-#define AVTAB_ALLOWED 1
-#define AVTAB_AUDITALLOW 2
-#define AVTAB_AUDITDENY 4
-#define AVTAB_AV (AVTAB_ALLOWED | AVTAB_AUDITALLOW | AVTAB_AUDITDENY)
-#define AVTAB_TRANSITION 16
-#define AVTAB_MEMBER 32
-#define AVTAB_CHANGE 64
-#define AVTAB_TYPE (AVTAB_TRANSITION | AVTAB_MEMBER | AVTAB_CHANGE)
-#define AVTAB_ENABLED_OLD 0x80000000 /* reserved for used in cond_avtab */
-#define AVTAB_ENABLED 0x8000 /* reserved for used in cond_avtab */
+#define AVTAB_ALLOWED 0x0001
+#define AVTAB_AUDITALLOW 0x0002
+#define AVTAB_AUDITDENY 0x0004
+#define AVTAB_AV (AVTAB_ALLOWED | AVTAB_AUDITALLOW | AVTAB_AUDITDENY)
+#define AVTAB_TRANSITION 0x0010
+#define AVTAB_MEMBER 0x0020
+#define AVTAB_CHANGE 0x0040
+#define AVTAB_TYPE (AVTAB_TRANSITION | AVTAB_MEMBER | AVTAB_CHANGE)
+#define AVTAB_ENABLED_OLD 0x80000000 /* reserved for used in cond_avtab */
+#define AVTAB_ENABLED 0x8000 /* reserved for used in cond_avtab */
u16 specified; /* what field is specified */
};
@@ -86,7 +86,6 @@ void avtab_cache_destroy(void);
#define MAX_AVTAB_HASH_BITS 11
#define MAX_AVTAB_HASH_BUCKETS (1 << MAX_AVTAB_HASH_BITS)
-#define MAX_AVTAB_HASH_MASK (MAX_AVTAB_HASH_BUCKETS-1)
#endif /* _SS_AVTAB_H_ */
diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index a53373207fb..377d148e715 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -175,7 +175,7 @@ void cond_policydb_destroy(struct policydb *p)
int cond_init_bool_indexes(struct policydb *p)
{
kfree(p->bool_val_to_struct);
- p->bool_val_to_struct = (struct cond_bool_datum **)
+ p->bool_val_to_struct =
kmalloc(p->p_bools.nprim * sizeof(struct cond_bool_datum *), GFP_KERNEL);
if (!p->bool_val_to_struct)
return -ENOMEM;
@@ -555,7 +555,7 @@ static int cond_write_av_list(struct policydb *p,
return 0;
}
-int cond_write_node(struct policydb *p, struct cond_node *node,
+static int cond_write_node(struct policydb *p, struct cond_node *node,
struct policy_file *fp)
{
struct cond_expr *cur_expr;
diff --git a/security/selinux/ss/conditional.h b/security/selinux/ss/conditional.h
index 3f209c63529..4d1f8746650 100644
--- a/security/selinux/ss/conditional.h
+++ b/security/selinux/ss/conditional.h
@@ -13,6 +13,7 @@
#include "avtab.h"
#include "symtab.h"
#include "policydb.h"
+#include "../include/conditional.h"
#define COND_EXPR_MAXDEPTH 10
diff --git a/security/selinux/ss/constraint.h b/security/selinux/ss/constraint.h
index 149dda731fd..96fd947c494 100644
--- a/security/selinux/ss/constraint.h
+++ b/security/selinux/ss/constraint.h
@@ -48,6 +48,7 @@ struct constraint_expr {
u32 op; /* operator */
struct ebitmap names; /* names */
+ struct type_set *type_names;
struct constraint_expr *next; /* next expression */
};
diff --git a/security/selinux/ss/context.h b/security/selinux/ss/context.h
index 45e8fb0515f..212e3479a0d 100644
--- a/security/selinux/ss/context.h
+++ b/security/selinux/ss/context.h
@@ -74,6 +74,26 @@ out:
return rc;
}
+/*
+ * Sets both levels in the MLS range of 'dst' to the high level of 'src'.
+ */
+static inline int mls_context_cpy_high(struct context *dst, struct context *src)
+{
+ int rc;
+
+ dst->range.level[0].sens = src->range.level[1].sens;
+ rc = ebitmap_cpy(&dst->range.level[0].cat, &src->range.level[1].cat);
+ if (rc)
+ goto out;
+
+ dst->range.level[1].sens = src->range.level[1].sens;
+ rc = ebitmap_cpy(&dst->range.level[1].cat, &src->range.level[1].cat);
+ if (rc)
+ ebitmap_destroy(&dst->range.level[0].cat);
+out:
+ return rc;
+}
+
static inline int mls_context_cmp(struct context *c1, struct context *c2)
{
return ((c1->range.level[0].sens == c2->range.level[0].sens) &&
diff --git a/security/selinux/ss/ebitmap.c b/security/selinux/ss/ebitmap.c
index d42951fcbe8..820313a04d4 100644
--- a/security/selinux/ss/ebitmap.c
+++ b/security/selinux/ss/ebitmap.c
@@ -4,7 +4,7 @@
* Author : Stephen Smalley, <sds@epoch.ncsc.mil>
*/
/*
- * Updated: Hewlett-Packard <paul.moore@hp.com>
+ * Updated: Hewlett-Packard <paul@paul-moore.com>
*
* Added support to import/export the NetLabel category bitmap
*
@@ -213,7 +213,12 @@ netlbl_import_failure:
}
#endif /* CONFIG_NETLABEL */
-int ebitmap_contains(struct ebitmap *e1, struct ebitmap *e2)
+/*
+ * Check to see if all the bits set in e2 are also set in e1. Optionally,
+ * if last_e2bit is non-zero, the highest set bit in e2 cannot exceed
+ * last_e2bit.
+ */
+int ebitmap_contains(struct ebitmap *e1, struct ebitmap *e2, u32 last_e2bit)
{
struct ebitmap_node *n1, *n2;
int i;
@@ -223,14 +228,25 @@ int ebitmap_contains(struct ebitmap *e1, struct ebitmap *e2)
n1 = e1->node;
n2 = e2->node;
+
while (n1 && n2 && (n1->startbit <= n2->startbit)) {
if (n1->startbit < n2->startbit) {
n1 = n1->next;
continue;
}
- for (i = 0; i < EBITMAP_UNIT_NUMS; i++) {
+ for (i = EBITMAP_UNIT_NUMS - 1; (i >= 0) && !n2->maps[i]; )
+ i--; /* Skip trailing NULL map entries */
+ if (last_e2bit && (i >= 0)) {
+ u32 lastsetbit = n2->startbit + i * EBITMAP_UNIT_SIZE +
+ __fls(n2->maps[i]);
+ if (lastsetbit > last_e2bit)
+ return 0;
+ }
+
+ while (i >= 0) {
if ((n1->maps[i] & n2->maps[i]) != n2->maps[i])
return 0;
+ i--;
}
n1 = n1->next;
diff --git a/security/selinux/ss/ebitmap.h b/security/selinux/ss/ebitmap.h
index 1f4e93c2ae8..712c8a7b8e8 100644
--- a/security/selinux/ss/ebitmap.h
+++ b/security/selinux/ss/ebitmap.h
@@ -16,7 +16,13 @@
#include <net/netlabel.h>
-#define EBITMAP_UNIT_NUMS ((32 - sizeof(void *) - sizeof(u32)) \
+#ifdef CONFIG_64BIT
+#define EBITMAP_NODE_SIZE 64
+#else
+#define EBITMAP_NODE_SIZE 32
+#endif
+
+#define EBITMAP_UNIT_NUMS ((EBITMAP_NODE_SIZE-sizeof(void *)-sizeof(u32))\
/ sizeof(unsigned long))
#define EBITMAP_UNIT_SIZE BITS_PER_LONG
#define EBITMAP_SIZE (EBITMAP_UNIT_NUMS * EBITMAP_UNIT_SIZE)
@@ -36,7 +42,6 @@ struct ebitmap {
};
#define ebitmap_length(e) ((e)->highbit)
-#define ebitmap_startbit(e) ((e)->node ? (e)->node->startbit : 0)
static inline unsigned int ebitmap_start_positive(struct ebitmap *e,
struct ebitmap_node **n)
@@ -118,7 +123,7 @@ static inline void ebitmap_node_clr_bit(struct ebitmap_node *n,
int ebitmap_cmp(struct ebitmap *e1, struct ebitmap *e2);
int ebitmap_cpy(struct ebitmap *dst, struct ebitmap *src);
-int ebitmap_contains(struct ebitmap *e1, struct ebitmap *e2);
+int ebitmap_contains(struct ebitmap *e1, struct ebitmap *e2, u32 last_e2bit);
int ebitmap_get_bit(struct ebitmap *e, unsigned long bit);
int ebitmap_set_bit(struct ebitmap *e, unsigned long bit, int value);
void ebitmap_destroy(struct ebitmap *e);
diff --git a/security/selinux/ss/hashtab.c b/security/selinux/ss/hashtab.c
index 933e735bb18..2cc49614984 100644
--- a/security/selinux/ss/hashtab.c
+++ b/security/selinux/ss/hashtab.c
@@ -6,6 +6,7 @@
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/errno.h>
+#include <linux/sched.h>
#include "hashtab.h"
struct hashtab *hashtab_create(u32 (*hash_value)(struct hashtab *h, const void *key),
@@ -40,6 +41,8 @@ int hashtab_insert(struct hashtab *h, void *key, void *datum)
u32 hvalue;
struct hashtab_node *prev, *cur, *newnode;
+ cond_resched();
+
if (!h || h->nel == HASHTAB_MAX_NODES)
return -EINVAL;
diff --git a/security/selinux/ss/mls.c b/security/selinux/ss/mls.c
index 1ef8e4e8988..d307b37ddc2 100644
--- a/security/selinux/ss/mls.c
+++ b/security/selinux/ss/mls.c
@@ -11,7 +11,7 @@
* Copyright (C) 2004-2006 Trusted Computer Solutions, Inc.
*/
/*
- * Updated: Hewlett-Packard <paul.moore@hp.com>
+ * Updated: Hewlett-Packard <paul@paul-moore.com>
*
* Added support to import/export the MLS label from NetLabel
*
@@ -160,8 +160,6 @@ void mls_sid_to_context(struct context *context,
int mls_level_isvalid(struct policydb *p, struct mls_level *l)
{
struct level_datum *levdatum;
- struct ebitmap_node *node;
- int i;
if (!l->sens || l->sens > p->p_levels.nprim)
return 0;
@@ -170,19 +168,13 @@ int mls_level_isvalid(struct policydb *p, struct mls_level *l)
if (!levdatum)
return 0;
- ebitmap_for_each_positive_bit(&l->cat, node, i) {
- if (i > p->p_cats.nprim)
- return 0;
- if (!ebitmap_get_bit(&levdatum->level->cat, i)) {
- /*
- * Category may not be associated with
- * sensitivity.
- */
- return 0;
- }
- }
-
- return 1;
+ /*
+ * Return 1 iff all the bits set in l->cat are also be set in
+ * levdatum->level->cat and no bit in l->cat is larger than
+ * p->p_cats.nprim.
+ */
+ return ebitmap_contains(&levdatum->level->cat, &l->cat,
+ p->p_cats.nprim);
}
int mls_range_isvalid(struct policydb *p, struct mls_range *r)
@@ -500,6 +492,8 @@ int mls_convert_context(struct policydb *oldp,
rc = ebitmap_set_bit(&bitmap, catdatum->value - 1, 1);
if (rc)
return rc;
+
+ cond_resched();
}
ebitmap_destroy(&c->range.level[l].cat);
c->range.level[l].cat = bitmap;
@@ -512,10 +506,13 @@ int mls_compute_sid(struct context *scontext,
struct context *tcontext,
u16 tclass,
u32 specified,
- struct context *newcontext)
+ struct context *newcontext,
+ bool sock)
{
struct range_trans rtr;
struct mls_range *r;
+ struct class_datum *cladatum;
+ int default_range = 0;
if (!policydb.mls_enabled)
return 0;
@@ -529,9 +526,31 @@ int mls_compute_sid(struct context *scontext,
r = hashtab_search(policydb.range_tr, &rtr);
if (r)
return mls_range_set(newcontext, r);
+
+ if (tclass && tclass <= policydb.p_classes.nprim) {
+ cladatum = policydb.class_val_to_struct[tclass - 1];
+ if (cladatum)
+ default_range = cladatum->default_range;
+ }
+
+ switch (default_range) {
+ case DEFAULT_SOURCE_LOW:
+ return mls_context_cpy_low(newcontext, scontext);
+ case DEFAULT_SOURCE_HIGH:
+ return mls_context_cpy_high(newcontext, scontext);
+ case DEFAULT_SOURCE_LOW_HIGH:
+ return mls_context_cpy(newcontext, scontext);
+ case DEFAULT_TARGET_LOW:
+ return mls_context_cpy_low(newcontext, tcontext);
+ case DEFAULT_TARGET_HIGH:
+ return mls_context_cpy_high(newcontext, tcontext);
+ case DEFAULT_TARGET_LOW_HIGH:
+ return mls_context_cpy(newcontext, tcontext);
+ }
+
/* Fallthrough */
case AVTAB_CHANGE:
- if (tclass == policydb.process_class)
+ if ((tclass == policydb.process_class) || (sock == true))
/* Use the process MLS attributes. */
return mls_context_cpy(newcontext, scontext);
else
diff --git a/security/selinux/ss/mls.h b/security/selinux/ss/mls.h
index cd9152632e5..e4369e3e636 100644
--- a/security/selinux/ss/mls.h
+++ b/security/selinux/ss/mls.h
@@ -11,7 +11,7 @@
* Copyright (C) 2004-2006 Trusted Computer Solutions, Inc.
*/
/*
- * Updated: Hewlett-Packard <paul.moore@hp.com>
+ * Updated: Hewlett-Packard <paul@paul-moore.com>
*
* Added support to import/export the MLS label from NetLabel
*
@@ -49,7 +49,8 @@ int mls_compute_sid(struct context *scontext,
struct context *tcontext,
u16 tclass,
u32 specified,
- struct context *newcontext);
+ struct context *newcontext,
+ bool sock);
int mls_setup_user_range(struct context *fromcon, struct user_datum *user,
struct context *usercon);
diff --git a/security/selinux/ss/mls_types.h b/security/selinux/ss/mls_types.h
index 03bed52a805..e9364877413 100644
--- a/security/selinux/ss/mls_types.h
+++ b/security/selinux/ss/mls_types.h
@@ -35,7 +35,7 @@ static inline int mls_level_eq(struct mls_level *l1, struct mls_level *l2)
static inline int mls_level_dom(struct mls_level *l1, struct mls_level *l2)
{
return ((l1->sens >= l2->sens) &&
- ebitmap_contains(&l1->cat, &l2->cat));
+ ebitmap_contains(&l1->cat, &l2->cat, 0));
}
#define mls_level_incomp(l1, l2) \
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 57363562f0f..9c5cdc2caae 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -13,7 +13,7 @@
*
* Added conditional policy language extensions
*
- * Updated: Hewlett-Packard <paul.moore@hp.com>
+ * Updated: Hewlett-Packard <paul@paul-moore.com>
*
* Added support for the policy capability bitmap
*
@@ -123,6 +123,31 @@ static struct policydb_compat_info policydb_compat[] = {
.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)
@@ -174,6 +199,43 @@ out:
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;
@@ -226,15 +288,22 @@ static int policydb_init(struct policydb *p)
if (rc)
goto out;
+ p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp, (1 << 10));
+ if (!p->filename_trans)
+ goto out;
+
p->range_tr = hashtab_create(rangetr_hash, rangetr_cmp, 256);
if (!p->range_tr)
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;
@@ -412,32 +481,26 @@ static int (*index_f[SYM_NUM]) (void *key, void *datum, void *datap) =
};
#ifdef DEBUG_HASHES
-static void symtab_hash_eval(struct symtab *s)
+static void hash_eval(struct hashtab *h, const char *hash_name)
{
- int i;
-
- for (i = 0; i < SYM_NUM; i++) {
- struct hashtab *h = s[i].table;
- struct hashtab_info info;
+ 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", symtab_name[i], h->nel,
- info.slots_used, h->size, info.max_chain_len);
- }
+ 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 rangetr_hash_eval(struct hashtab *h)
+static void symtab_hash_eval(struct symtab *s)
{
- struct hashtab_info info;
+ int i;
- hashtab_stat(h, &info);
- printk(KERN_DEBUG "SELinux: rangetr: %d entries and %d/%d buckets used, "
- "longest chain length %d\n", h->nel,
- info.slots_used, h->size, info.max_chain_len);
+ for (i = 0; i < SYM_NUM; i++)
+ hash_eval(s[i].table, symtab_name[i]);
}
+
#else
-static inline void rangetr_hash_eval(struct hashtab *h)
+static inline void hash_eval(struct hashtab *h, char *hash_name)
{
}
#endif
@@ -497,7 +560,7 @@ static int policydb_index(struct policydb *p)
goto out;
rc = flex_array_prealloc(p->type_val_to_struct_array, 0,
- p->p_types.nprim - 1, GFP_KERNEL | __GFP_ZERO);
+ p->p_types.nprim, GFP_KERNEL | __GFP_ZERO);
if (rc)
goto out;
@@ -514,7 +577,7 @@ static int policydb_index(struct policydb *p)
goto out;
rc = flex_array_prealloc(p->sym_val_to_name[i],
- 0, p->symtab[i].nprim - 1,
+ 0, p->symtab[i].nprim,
GFP_KERNEL | __GFP_ZERO);
if (rc)
goto out;
@@ -555,6 +618,19 @@ static int common_destroy(void *key, void *datum, void *p)
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;
@@ -570,10 +646,9 @@ static int cls_destroy(void *key, void *datum, void *p)
while (constraint) {
e = constraint->expr;
while (e) {
- ebitmap_destroy(&e->names);
etmp = e;
e = e->next;
- kfree(etmp);
+ constraint_expr_destroy(etmp);
}
ctemp = constraint;
constraint = constraint->next;
@@ -584,16 +659,14 @@ static int cls_destroy(void *key, void *datum, void *p)
while (constraint) {
e = constraint->expr;
while (e) {
- ebitmap_destroy(&e->names);
etmp = e;
e = e->next;
- kfree(etmp);
+ constraint_expr_destroy(etmp);
}
ctemp = constraint;
constraint = constraint->next;
kfree(ctemp);
}
-
kfree(cladatum->comkey);
}
kfree(datum);
@@ -670,6 +743,16 @@ static int (*destroy_f[SYM_NUM]) (void *key, void *datum, void *datap) =
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;
@@ -767,6 +850,9 @@ void policydb_destroy(struct policydb *p)
}
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);
@@ -781,6 +867,8 @@ void policydb_destroy(struct policydb *p)
}
flex_array_free(p->type_attr_map_array);
}
+
+ ebitmap_destroy(&p->filename_trans_ttypes);
ebitmap_destroy(&p->policycaps);
ebitmap_destroy(&p->permissive_map);
@@ -1083,8 +1171,34 @@ bad:
return rc;
}
-static int read_cons_helper(struct constraint_node **nodep, int ncons,
- int allowxtarget, void *fp)
+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;
@@ -1152,6 +1266,18 @@ static int read_cons_helper(struct constraint_node **nodep, int ncons,
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;
@@ -1228,7 +1354,7 @@ static int class_read(struct policydb *p, struct hashtab *h, void *fp)
goto bad;
}
- rc = read_cons_helper(&cladatum->constraints, ncons, 0, fp);
+ rc = read_cons_helper(p, &cladatum->constraints, ncons, 0, fp);
if (rc)
goto bad;
@@ -1238,11 +1364,29 @@ static int class_read(struct policydb *p, struct hashtab *h, void *fp)
if (rc)
goto bad;
ncons = le32_to_cpu(buf[0]);
- rc = read_cons_helper(&cladatum->validatetrans, ncons, 1, fp);
+ 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;
@@ -1680,8 +1824,6 @@ static int policydb_bounds_sanity_check(struct policydb *p)
return 0;
}
-extern int ss_initialized;
-
u16 string_to_security_class(struct policydb *p, const char *name)
{
struct class_datum *cladatum;
@@ -1780,7 +1922,7 @@ static int range_read(struct policydb *p, void *fp)
rt = NULL;
r = NULL;
}
- rangetr_hash_eval(p->range_tr);
+ hash_eval(p->range_tr, "rangetr");
rc = 0;
out:
kfree(rt);
@@ -1788,6 +1930,95 @@ out:
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]);
+
+ rc = -ENOMEM;
+ name = kmalloc(len + 1, GFP_KERNEL);
+ if (!name)
+ goto out;
+
+ ft->name = name;
+
+ /* path component string */
+ rc = next_entry(name, fp, len);
+ if (rc)
+ goto out;
+ name[len] = 0;
+
+ 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;
@@ -2003,7 +2234,10 @@ static int ocontext_read(struct policydb *p, struct policydb_compat_info *info,
rc = -EINVAL;
c->v.behavior = le32_to_cpu(buf[0]);
- if (c->v.behavior > SECURITY_FS_USE_NONE)
+ /* 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;
rc = -ENOMEM;
@@ -2185,6 +2419,11 @@ int policydb_read(struct policydb *p, void *fp)
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;
@@ -2217,8 +2456,17 @@ int policydb_read(struct policydb *p, void *fp)
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;
@@ -2251,13 +2499,12 @@ int policydb_read(struct policydb *p, void *fp)
lra = ra;
}
- rc = policydb_index(p);
+ rc = filename_trans_read(p, fp);
if (rc)
goto bad;
- rc = -EINVAL;
- p->process_class = string_to_security_class(p, "process");
- if (!p->process_class)
+ rc = policydb_index(p);
+ if (rc)
goto bad;
rc = -EINVAL;
@@ -2286,7 +2533,7 @@ int policydb_read(struct policydb *p, void *fp)
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 - 1,
+ rc = flex_array_prealloc(p->type_attr_map_array, 0, p->p_types.nprim,
GFP_KERNEL | __GFP_ZERO);
if (rc)
goto bad;
@@ -2432,8 +2679,9 @@ static int cat_write(void *vkey, void *datum, void *ptr)
return 0;
}
-static int role_trans_write(struct role_trans *r, void *fp)
+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;
@@ -2453,6 +2701,12 @@ static int role_trans_write(struct role_trans *r, void *fp)
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;
@@ -2565,6 +2819,24 @@ static int common_write(void *vkey, void *datum, void *ptr)
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)
{
@@ -2596,6 +2868,12 @@ static int write_cons_helper(struct policydb *p, struct constraint_node *node,
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;
@@ -2674,6 +2952,23 @@ static int class_write(void *vkey, void *datum, void *ptr)
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;
}
@@ -2960,7 +3255,7 @@ static int genfs_write(struct policydb *p, void *fp)
return 0;
}
-static int range_count(void *key, void *data, void *ptr)
+static int hashtab_cnt(void *key, void *data, void *ptr)
{
int *cnt = ptr;
*cnt = *cnt + 1;
@@ -2998,9 +3293,8 @@ static int range_write_helper(void *key, void *data, void *ptr)
static int range_write(struct policydb *p, void *fp)
{
- size_t nel;
__le32 buf[1];
- int rc;
+ int rc, nel;
struct policy_data pd;
pd.p = p;
@@ -3008,7 +3302,7 @@ static int range_write(struct policydb *p, void *fp)
/* count the number of entries in the hashtab */
nel = 0;
- rc = hashtab_map(p->range_tr, range_count, &nel);
+ rc = hashtab_map(p->range_tr, hashtab_cnt, &nel);
if (rc)
return rc;
@@ -3025,6 +3319,63 @@ static int range_write(struct policydb *p, void *fp)
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
@@ -3127,7 +3478,7 @@ int policydb_write(struct policydb *p, void *fp)
if (rc)
return rc;
- rc = role_trans_write(p->role_tr, fp);
+ rc = role_trans_write(p, fp);
if (rc)
return rc;
@@ -3135,6 +3486,10 @@ int policydb_write(struct policydb *p, void *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;
diff --git a/security/selinux/ss/policydb.h b/security/selinux/ss/policydb.h
index 4e3ab9d0b31..725d5945a97 100644
--- a/security/selinux/ss/policydb.h
+++ b/security/selinux/ss/policydb.h
@@ -60,6 +60,20 @@ struct class_datum {
struct symtab permissions; /* class-specific permission symbol table */
struct constraint_node *constraints; /* constraints on class permissions */
struct constraint_node *validatetrans; /* special transition rules */
+/* Options how a new object user, role, and type should be decided */
+#define DEFAULT_SOURCE 1
+#define DEFAULT_TARGET 2
+ char default_user;
+ char default_role;
+ char default_type;
+/* Options how a new object range should be decided */
+#define DEFAULT_SOURCE_LOW 1
+#define DEFAULT_SOURCE_HIGH 2
+#define DEFAULT_SOURCE_LOW_HIGH 3
+#define DEFAULT_TARGET_LOW 4
+#define DEFAULT_TARGET_HIGH 5
+#define DEFAULT_TARGET_LOW_HIGH 6
+ char default_range;
};
/* Role attributes */
@@ -72,11 +86,23 @@ struct role_datum {
struct role_trans {
u32 role; /* current role */
- u32 type; /* program executable type */
+ u32 type; /* program executable type, or new object type */
+ u32 tclass; /* process class, or new object class */
u32 new_role; /* new role */
struct role_trans *next;
};
+struct filename_trans {
+ u32 stype; /* current process */
+ u32 ttype; /* parent dir context */
+ u16 tclass; /* class of new object */
+ const char *name; /* last path component */
+};
+
+struct filename_trans_datum {
+ u32 otype; /* expected of new object */
+};
+
struct role_allow {
u32 role; /* current role */
u32 new_role; /* new role */
@@ -128,6 +154,17 @@ struct cond_bool_datum {
struct cond_node;
/*
+ * type set preserves data needed to determine constraint info from
+ * policy source. This is not used by the kernel policy but allows
+ * utilities such as audit2allow to determine constraint denials.
+ */
+struct type_set {
+ struct ebitmap types;
+ struct ebitmap negset;
+ u32 flags;
+};
+
+/*
* The configuration data includes security contexts for
* initial SIDs, unlabeled file systems, TCP and UDP port numbers,
* network interfaces, and nodes. This structure stores the
@@ -217,6 +254,12 @@ struct policydb {
/* role transitions */
struct role_trans *role_tr;
+ /* file transitions with the last path component */
+ /* quickly exclude lookups when parent ttype has no rules */
+ struct ebitmap filename_trans_ttypes;
+ /* actual set of filename_trans rules */
+ struct hashtab *filename_trans;
+
/* bools indexed by (value - 1) */
struct cond_bool_datum **bool_val_to_struct;
/* type enforcement conditional access vectors and transitions */
@@ -302,7 +345,7 @@ static inline int next_entry(void *buf, struct policy_file *fp, size_t bytes)
return 0;
}
-static inline int put_entry(void *buf, size_t bytes, int num, struct policy_file *fp)
+static inline int put_entry(const void *buf, size_t bytes, int num, struct policy_file *fp)
{
size_t len = bytes * num;
diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index a03cfaf0ee0..4bca49414a4 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -13,7 +13,7 @@
*
* Added conditional policy language extensions
*
- * Updated: Hewlett-Packard <paul.moore@hp.com>
+ * Updated: Hewlett-Packard <paul@paul-moore.com>
*
* Added support for NetLabel
* Added support for the policy capability bitmap
@@ -70,10 +70,9 @@
#include "ebitmap.h"
#include "audit.h"
-extern void selnl_notify_policyload(u32 seqno);
-
int selinux_policycap_netpeer;
int selinux_policycap_openperm;
+int selinux_policycap_alwaysnetwork;
static DEFINE_RWLOCK(policy_rwlock);
@@ -201,6 +200,21 @@ static u16 unmap_class(u16 tclass)
return tclass;
}
+/*
+ * Get kernel value for class from its policy value
+ */
+static u16 map_class(u16 pol_value)
+{
+ u16 i;
+
+ for (i = 1; i < current_mapping_size; i++) {
+ if (current_mapping[i].value == pol_value)
+ return i;
+ }
+
+ return SECCLASS_NULL;
+}
+
static void map_decision(u16 tclass, struct av_decision *avd,
int allow_unknown)
{
@@ -1005,9 +1019,11 @@ static int context_struct_to_string(struct context *context, char **scontext, u3
if (context->len) {
*scontext_len = context->len;
- *scontext = kstrdup(context->str, GFP_ATOMIC);
- if (!(*scontext))
- return -ENOMEM;
+ if (scontext) {
+ *scontext = kstrdup(context->str, GFP_ATOMIC);
+ if (!(*scontext))
+ return -ENOMEM;
+ }
return 0;
}
@@ -1216,6 +1232,10 @@ static int security_context_to_sid_core(const char *scontext, u32 scontext_len,
struct context context;
int rc = 0;
+ /* An empty security context is never valid. */
+ if (!scontext_len)
+ return -EINVAL;
+
if (!ss_initialized) {
int i;
@@ -1269,16 +1289,18 @@ out:
* @scontext: security context
* @scontext_len: length in bytes
* @sid: security identifier, SID
+ * @gfp: context for the allocation
*
* Obtains a SID associated with the security context that
* has the string representation specified by @scontext.
* Returns -%EINVAL if the context is invalid, -%ENOMEM if insufficient
* memory is available, or 0 on success.
*/
-int security_context_to_sid(const char *scontext, u32 scontext_len, u32 *sid)
+int security_context_to_sid(const char *scontext, u32 scontext_len, u32 *sid,
+ gfp_t gfp)
{
return security_context_to_sid_core(scontext, scontext_len,
- sid, SECSID_NULL, GFP_KERNEL, 0);
+ sid, SECSID_NULL, gfp, 0);
}
/**
@@ -1343,13 +1365,40 @@ out:
return -EACCES;
}
+static void filename_compute_type(struct policydb *p, struct context *newcontext,
+ u32 stype, u32 ttype, u16 tclass,
+ const char *objname)
+{
+ struct filename_trans ft;
+ struct filename_trans_datum *otype;
+
+ /*
+ * Most filename trans rules are going to live in specific directories
+ * like /dev or /var/run. This bitmap will quickly skip rule searches
+ * if the ttype does not contain any rules.
+ */
+ if (!ebitmap_get_bit(&p->filename_trans_ttypes, ttype))
+ return;
+
+ ft.stype = stype;
+ ft.ttype = ttype;
+ ft.tclass = tclass;
+ ft.name = objname;
+
+ otype = hashtab_search(p->filename_trans, &ft);
+ if (otype)
+ newcontext->type = otype->otype;
+}
+
static int security_compute_sid(u32 ssid,
u32 tsid,
u16 orig_tclass,
u32 specified,
+ const char *objname,
u32 *out_sid,
bool kern)
{
+ struct class_datum *cladatum = NULL;
struct context *scontext = NULL, *tcontext = NULL, newcontext;
struct role_trans *roletr = NULL;
struct avtab_key avkey;
@@ -1357,6 +1406,7 @@ static int security_compute_sid(u32 ssid,
struct avtab_node *node;
u16 tclass;
int rc = 0;
+ bool sock;
if (!ss_initialized) {
switch (orig_tclass) {
@@ -1374,10 +1424,13 @@ static int security_compute_sid(u32 ssid,
read_lock(&policy_rwlock);
- if (kern)
+ if (kern) {
tclass = unmap_class(orig_tclass);
- else
+ sock = security_is_socket_class(orig_tclass);
+ } else {
tclass = orig_tclass;
+ sock = security_is_socket_class(map_class(tclass));
+ }
scontext = sidtab_search(&sidtab, ssid);
if (!scontext) {
@@ -1394,12 +1447,20 @@ static int security_compute_sid(u32 ssid,
goto out_unlock;
}
+ if (tclass && tclass <= policydb.p_classes.nprim)
+ cladatum = policydb.class_val_to_struct[tclass - 1];
+
/* Set the user identity. */
switch (specified) {
case AVTAB_TRANSITION:
case AVTAB_CHANGE:
- /* Use the process user identity. */
- newcontext.user = scontext->user;
+ if (cladatum && cladatum->default_user == DEFAULT_TARGET) {
+ newcontext.user = tcontext->user;
+ } else {
+ /* notice this gets both DEFAULT_SOURCE and unset */
+ /* Use the process user identity. */
+ newcontext.user = scontext->user;
+ }
break;
case AVTAB_MEMBER:
/* Use the related object owner. */
@@ -1407,16 +1468,31 @@ static int security_compute_sid(u32 ssid,
break;
}
- /* Set the role and type to default values. */
- if (tclass == policydb.process_class) {
- /* Use the current role and type of process. */
+ /* Set the role to default values. */
+ if (cladatum && cladatum->default_role == DEFAULT_SOURCE) {
newcontext.role = scontext->role;
- newcontext.type = scontext->type;
+ } else if (cladatum && cladatum->default_role == DEFAULT_TARGET) {
+ newcontext.role = tcontext->role;
} else {
- /* Use the well-defined object role. */
- newcontext.role = OBJECT_R_VAL;
- /* Use the type of the related object. */
+ if ((tclass == policydb.process_class) || (sock == true))
+ newcontext.role = scontext->role;
+ else
+ newcontext.role = OBJECT_R_VAL;
+ }
+
+ /* Set the type to default values. */
+ if (cladatum && cladatum->default_type == DEFAULT_SOURCE) {
+ newcontext.type = scontext->type;
+ } else if (cladatum && cladatum->default_type == DEFAULT_TARGET) {
newcontext.type = tcontext->type;
+ } else {
+ if ((tclass == policydb.process_class) || (sock == true)) {
+ /* Use the type of process. */
+ newcontext.type = scontext->type;
+ } else {
+ /* Use the type of the related object. */
+ newcontext.type = tcontext->type;
+ }
}
/* Look for a type transition/member/change rule. */
@@ -1442,25 +1518,29 @@ static int security_compute_sid(u32 ssid,
newcontext.type = avdatum->data;
}
+ /* if we have a objname this is a file trans check so check those rules */
+ if (objname)
+ filename_compute_type(&policydb, &newcontext, scontext->type,
+ tcontext->type, tclass, objname);
+
/* Check for class-specific changes. */
- if (tclass == policydb.process_class) {
- if (specified & AVTAB_TRANSITION) {
- /* Look for a role transition rule. */
- for (roletr = policydb.role_tr; roletr;
- roletr = roletr->next) {
- if (roletr->role == scontext->role &&
- roletr->type == tcontext->type) {
- /* Use the role transition rule. */
- newcontext.role = roletr->new_role;
- break;
- }
+ if (specified & AVTAB_TRANSITION) {
+ /* Look for a role transition rule. */
+ for (roletr = policydb.role_tr; roletr; roletr = roletr->next) {
+ if ((roletr->role == scontext->role) &&
+ (roletr->type == tcontext->type) &&
+ (roletr->tclass == tclass)) {
+ /* Use the role transition rule. */
+ newcontext.role = roletr->new_role;
+ break;
}
}
}
/* Set the MLS attributes.
This is done last because it may allocate memory. */
- rc = mls_compute_sid(scontext, tcontext, tclass, specified, &newcontext);
+ rc = mls_compute_sid(scontext, tcontext, tclass, specified,
+ &newcontext, sock);
if (rc)
goto out_unlock;
@@ -1495,22 +1575,18 @@ out:
* if insufficient memory is available, or %0 if the new SID was
* computed successfully.
*/
-int security_transition_sid(u32 ssid,
- u32 tsid,
- u16 tclass,
- u32 *out_sid)
+int security_transition_sid(u32 ssid, u32 tsid, u16 tclass,
+ const struct qstr *qstr, u32 *out_sid)
{
return security_compute_sid(ssid, tsid, tclass, AVTAB_TRANSITION,
- out_sid, true);
+ qstr ? qstr->name : NULL, out_sid, true);
}
-int security_transition_sid_user(u32 ssid,
- u32 tsid,
- u16 tclass,
- u32 *out_sid)
+int security_transition_sid_user(u32 ssid, u32 tsid, u16 tclass,
+ const char *objname, u32 *out_sid)
{
return security_compute_sid(ssid, tsid, tclass, AVTAB_TRANSITION,
- out_sid, false);
+ objname, out_sid, false);
}
/**
@@ -1531,8 +1607,8 @@ int security_member_sid(u32 ssid,
u16 tclass,
u32 *out_sid)
{
- return security_compute_sid(ssid, tsid, tclass, AVTAB_MEMBER, out_sid,
- false);
+ return security_compute_sid(ssid, tsid, tclass, AVTAB_MEMBER, NULL,
+ out_sid, false);
}
/**
@@ -1553,8 +1629,8 @@ int security_change_sid(u32 ssid,
u16 tclass,
u32 *out_sid)
{
- return security_compute_sid(ssid, tsid, tclass, AVTAB_CHANGE, out_sid,
- false);
+ return security_compute_sid(ssid, tsid, tclass, AVTAB_CHANGE, NULL,
+ out_sid, false);
}
/* Clone the SID into the new SID table. */
@@ -1743,9 +1819,10 @@ static void security_load_policycaps(void)
POLICYDB_CAPABILITY_NETPEER);
selinux_policycap_openperm = ebitmap_get_bit(&policydb.policycaps,
POLICYDB_CAPABILITY_OPENPERM);
+ selinux_policycap_alwaysnetwork = ebitmap_get_bit(&policydb.policycaps,
+ POLICYDB_CAPABILITY_ALWAYSNETWORK);
}
-extern void selinux_complete_init(void);
static int security_preserve_bools(struct policydb *p);
/**
@@ -1760,7 +1837,7 @@ static int security_preserve_bools(struct policydb *p);
*/
int security_load_policy(void *data, size_t len)
{
- struct policydb oldpolicydb, newpolicydb;
+ struct policydb *oldpolicydb, *newpolicydb;
struct sidtab oldsidtab, newsidtab;
struct selinux_mapping *oldmap, *map = NULL;
struct convert_context_args args;
@@ -1769,12 +1846,19 @@ int security_load_policy(void *data, size_t len)
int rc = 0;
struct policy_file file = { data, len }, *fp = &file;
+ oldpolicydb = kzalloc(2 * sizeof(*oldpolicydb), GFP_KERNEL);
+ if (!oldpolicydb) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ newpolicydb = oldpolicydb + 1;
+
if (!ss_initialized) {
avtab_cache_init();
rc = policydb_read(&policydb, fp);
if (rc) {
avtab_cache_destroy();
- return rc;
+ goto out;
}
policydb.len = len;
@@ -1784,14 +1868,14 @@ int security_load_policy(void *data, size_t len)
if (rc) {
policydb_destroy(&policydb);
avtab_cache_destroy();
- return rc;
+ goto out;
}
rc = policydb_load_isids(&policydb, &sidtab);
if (rc) {
policydb_destroy(&policydb);
avtab_cache_destroy();
- return rc;
+ goto out;
}
security_load_policycaps();
@@ -1803,36 +1887,36 @@ int security_load_policy(void *data, size_t len)
selinux_status_update_policyload(seqno);
selinux_netlbl_cache_invalidate();
selinux_xfrm_notify_policyload();
- return 0;
+ goto out;
}
#if 0
sidtab_hash_eval(&sidtab, "sids");
#endif
- rc = policydb_read(&newpolicydb, fp);
+ rc = policydb_read(newpolicydb, fp);
if (rc)
- return rc;
+ goto out;
- newpolicydb.len = len;
+ newpolicydb->len = len;
/* If switching between different policy types, log MLS status */
- if (policydb.mls_enabled && !newpolicydb.mls_enabled)
+ if (policydb.mls_enabled && !newpolicydb->mls_enabled)
printk(KERN_INFO "SELinux: Disabling MLS support...\n");
- else if (!policydb.mls_enabled && newpolicydb.mls_enabled)
+ else if (!policydb.mls_enabled && newpolicydb->mls_enabled)
printk(KERN_INFO "SELinux: Enabling MLS support...\n");
- rc = policydb_load_isids(&newpolicydb, &newsidtab);
+ rc = policydb_load_isids(newpolicydb, &newsidtab);
if (rc) {
printk(KERN_ERR "SELinux: unable to load the initial SIDs\n");
- policydb_destroy(&newpolicydb);
- return rc;
+ policydb_destroy(newpolicydb);
+ goto out;
}
- rc = selinux_set_mapping(&newpolicydb, secclass_map, &map, &map_size);
+ rc = selinux_set_mapping(newpolicydb, secclass_map, &map, &map_size);
if (rc)
goto err;
- rc = security_preserve_bools(&newpolicydb);
+ rc = security_preserve_bools(newpolicydb);
if (rc) {
printk(KERN_ERR "SELinux: unable to preserve booleans\n");
goto err;
@@ -1850,7 +1934,7 @@ int security_load_policy(void *data, size_t len)
* in the new SID table.
*/
args.oldp = &policydb;
- args.newp = &newpolicydb;
+ args.newp = newpolicydb;
rc = sidtab_map(&newsidtab, convert_context, &args);
if (rc) {
printk(KERN_ERR "SELinux: unable to convert the internal"
@@ -1860,12 +1944,12 @@ int security_load_policy(void *data, size_t len)
}
/* Save the old policydb and SID table to free later. */
- memcpy(&oldpolicydb, &policydb, sizeof policydb);
+ memcpy(oldpolicydb, &policydb, sizeof(policydb));
sidtab_set(&oldsidtab, &sidtab);
/* Install the new policydb and SID table. */
write_lock_irq(&policy_rwlock);
- memcpy(&policydb, &newpolicydb, sizeof policydb);
+ memcpy(&policydb, newpolicydb, sizeof(policydb));
sidtab_set(&sidtab, &newsidtab);
security_load_policycaps();
oldmap = current_mapping;
@@ -1875,7 +1959,7 @@ int security_load_policy(void *data, size_t len)
write_unlock_irq(&policy_rwlock);
/* Free the old policydb and SID table. */
- policydb_destroy(&oldpolicydb);
+ policydb_destroy(oldpolicydb);
sidtab_destroy(&oldsidtab);
kfree(oldmap);
@@ -1885,14 +1969,17 @@ int security_load_policy(void *data, size_t len)
selinux_netlbl_cache_invalidate();
selinux_xfrm_notify_policyload();
- return 0;
+ rc = 0;
+ goto out;
err:
kfree(map);
sidtab_destroy(&newsidtab);
- policydb_destroy(&newpolicydb);
- return rc;
+ policydb_destroy(newpolicydb);
+out:
+ kfree(oldpolicydb);
+ return rc;
}
size_t security_policydb_len(void)
@@ -2172,10 +2259,11 @@ out_unlock:
goto out;
}
for (i = 0, j = 0; i < mynel; i++) {
+ struct av_decision dummy_avd;
rc = avc_has_perm_noaudit(fromsid, mysids[i],
SECCLASS_PROCESS, /* kernel value */
PROCESS__TRANSITION, AVC_STRICT,
- NULL);
+ &dummy_avd);
if (!rc)
mysids2[j++] = mysids[i];
cond_resched();
@@ -2254,17 +2342,14 @@ out:
/**
* security_fs_use - Determine how to handle labeling for a filesystem.
- * @fstype: filesystem type
- * @behavior: labeling behavior
- * @sid: SID for filesystem (superblock)
+ * @sb: superblock in question
*/
-int security_fs_use(
- const char *fstype,
- unsigned int *behavior,
- u32 *sid)
+int security_fs_use(struct super_block *sb)
{
int rc = 0;
struct ocontext *c;
+ struct superblock_security_struct *sbsec = sb->s_security;
+ const char *fstype = sb->s_type->name;
read_lock(&policy_rwlock);
@@ -2276,21 +2361,21 @@ int security_fs_use(
}
if (c) {
- *behavior = c->v.behavior;
+ sbsec->behavior = c->v.behavior;
if (!c->sid[0]) {
rc = sidtab_context_to_sid(&sidtab, &c->context[0],
&c->sid[0]);
if (rc)
goto out;
}
- *sid = c->sid[0];
+ sbsec->sid = c->sid[0];
} else {
- rc = security_genfs_sid(fstype, "/", SECCLASS_DIR, sid);
+ rc = security_genfs_sid(fstype, "/", SECCLASS_DIR, &sbsec->sid);
if (rc) {
- *behavior = SECURITY_FS_USE_NONE;
+ sbsec->behavior = SECURITY_FS_USE_NONE;
rc = 0;
} else {
- *behavior = SECURITY_FS_USE_GENFS;
+ sbsec->behavior = SECURITY_FS_USE_GENFS;
}
}
@@ -2371,7 +2456,7 @@ int security_set_bools(int len, int *values)
sym_name(&policydb, SYM_BOOLS, i),
!!values[i],
policydb.bool_val_to_struct[i]->state,
- audit_get_loginuid(current),
+ from_kuid(&init_user_ns, audit_get_loginuid(current)),
audit_get_sessionid(current));
}
if (values[i])
@@ -2769,7 +2854,7 @@ int selinux_audit_rule_init(u32 field, u32 op, char *rulestr, void **vrule)
case AUDIT_SUBJ_CLR:
case AUDIT_OBJ_LEV_LOW:
case AUDIT_OBJ_LEV_HIGH:
- /* we do not allow a range, indicated by the presense of '-' */
+ /* we do not allow a range, indicated by the presence of '-' */
if (strchr(rulestr, '-'))
return -EINVAL;
break;
@@ -2869,25 +2954,21 @@ int selinux_audit_rule_match(u32 sid, u32 field, u32 op, void *vrule,
struct selinux_audit_rule *rule = vrule;
int match = 0;
- if (!rule) {
- audit_log(actx, GFP_ATOMIC, AUDIT_SELINUX_ERR,
- "selinux_audit_rule_match: missing rule\n");
+ if (unlikely(!rule)) {
+ WARN_ONCE(1, "selinux_audit_rule_match: missing rule\n");
return -ENOENT;
}
read_lock(&policy_rwlock);
if (rule->au_seqno < latest_granting) {
- audit_log(actx, GFP_ATOMIC, AUDIT_SELINUX_ERR,
- "selinux_audit_rule_match: stale rule\n");
match = -ESTALE;
goto out;
}
ctxt = sidtab_search(&sidtab, sid);
- if (!ctxt) {
- audit_log(actx, GFP_ATOMIC, AUDIT_SELINUX_ERR,
- "selinux_audit_rule_match: unrecognized SID %d\n",
+ if (unlikely(!ctxt)) {
+ WARN_ONCE(1, "selinux_audit_rule_match: unrecognized SID %d\n",
sid);
match = -ENOENT;
goto out;
@@ -2975,8 +3056,7 @@ out:
static int (*aurule_callback)(void) = audit_update_lsm_rules;
-static int aurule_avc_callback(u32 event, u32 ssid, u32 tsid,
- u16 class, u32 perms, u32 *retained)
+static int aurule_avc_callback(u32 event)
{
int err = 0;
@@ -2989,8 +3069,7 @@ static int __init aurule_init(void)
{
int err;
- err = avc_add_callback(aurule_avc_callback, AVC_CALLBACK_RESET,
- SECSID_NULL, SECSID_NULL, SECCLASS_NULL, 0);
+ err = avc_add_callback(aurule_avc_callback, AVC_CALLBACK_RESET);
if (err)
panic("avc_add_callback() failed, error %d\n", err);
@@ -3038,7 +3117,7 @@ static void security_netlbl_cache_add(struct netlbl_lsm_secattr *secattr,
* Description:
* Convert the given NetLabel security attributes in @secattr into a
* SELinux SID. If the @secattr field does not contain a full SELinux
- * SID/context then use SECINITSID_NETMSG as the foundation. If possibile the
+ * SID/context then use SECINITSID_NETMSG as the foundation. If possible the
* 'cache' field of @secattr is set and the CACHE flag is set; this is to
* allow the @secattr to be used by NetLabel to cache the secattr to SID
* conversion for future lookups. Returns zero on success, negative values on
@@ -3153,7 +3232,7 @@ out:
* @len: length of data in bytes
*
*/
-int security_read_policy(void **data, ssize_t *len)
+int security_read_policy(void **data, size_t *len)
{
int rc;
struct policy_file fp;
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 07:39:01 +0000