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Diffstat (limited to 'security/selinux/ss/policydb.c')
-rw-r--r--security/selinux/ss/policydb.c107
1 files changed, 80 insertions, 27 deletions
diff --git a/security/selinux/ss/policydb.c b/security/selinux/ss/policydb.c
index 785c33cf4864..0a758323a9cf 100644
--- a/security/selinux/ss/policydb.c
+++ b/security/selinux/ss/policydb.c
@@ -91,6 +91,11 @@ static struct policydb_compat_info policydb_compat[] = {
.sym_num = SYM_NUM,
.ocon_num = OCON_NUM,
},
+ {
+ .version = POLICYDB_VERSION_AVTAB,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
};
static struct policydb_compat_info *policydb_lookup_compat(int version)
@@ -584,6 +589,9 @@ void policydb_destroy(struct policydb *p)
struct ocontext *c, *ctmp;
struct genfs *g, *gtmp;
int i;
+ struct role_allow *ra, *lra = NULL;
+ struct role_trans *tr, *ltr = NULL;
+ struct range_trans *rt, *lrt = NULL;
for (i = 0; i < SYM_NUM; i++) {
hashtab_map(p->symtab[i].table, destroy_f[i], NULL);
@@ -624,6 +632,28 @@ void policydb_destroy(struct policydb *p)
cond_policydb_destroy(p);
+ for (tr = p->role_tr; tr; tr = tr->next) {
+ if (ltr) kfree(ltr);
+ ltr = tr;
+ }
+ if (ltr) kfree(ltr);
+
+ for (ra = p->role_allow; ra; ra = ra -> next) {
+ if (lra) kfree(lra);
+ lra = ra;
+ }
+ if (lra) kfree(lra);
+
+ for (rt = p->range_tr; rt; rt = rt -> next) {
+ if (lrt) kfree(lrt);
+ lrt = rt;
+ }
+ if (lrt) kfree(lrt);
+
+ for (i = 0; i < p->p_types.nprim; i++)
+ ebitmap_destroy(&p->type_attr_map[i]);
+ kfree(p->type_attr_map);
+
return;
}
@@ -714,7 +744,8 @@ int policydb_context_isvalid(struct policydb *p, struct context *c)
*/
static int mls_read_range_helper(struct mls_range *r, void *fp)
{
- u32 buf[2], items;
+ __le32 buf[2];
+ u32 items;
int rc;
rc = next_entry(buf, fp, sizeof(u32));
@@ -775,7 +806,7 @@ static int context_read_and_validate(struct context *c,
struct policydb *p,
void *fp)
{
- u32 buf[3];
+ __le32 buf[3];
int rc;
rc = next_entry(buf, fp, sizeof buf);
@@ -815,7 +846,8 @@ static int perm_read(struct policydb *p, struct hashtab *h, void *fp)
char *key = NULL;
struct perm_datum *perdatum;
int rc;
- u32 buf[2], len;
+ __le32 buf[2];
+ u32 len;
perdatum = kmalloc(sizeof(*perdatum), GFP_KERNEL);
if (!perdatum) {
@@ -855,7 +887,8 @@ static int common_read(struct policydb *p, struct hashtab *h, void *fp)
{
char *key = NULL;
struct common_datum *comdatum;
- u32 buf[4], len, nel;
+ __le32 buf[4];
+ u32 len, nel;
int i, rc;
comdatum = kmalloc(sizeof(*comdatum), GFP_KERNEL);
@@ -909,7 +942,8 @@ static int read_cons_helper(struct constraint_node **nodep, int ncons,
{
struct constraint_node *c, *lc;
struct constraint_expr *e, *le;
- u32 buf[3], nexpr;
+ __le32 buf[3];
+ u32 nexpr;
int rc, i, j, depth;
lc = NULL;
@@ -993,7 +1027,8 @@ static int class_read(struct policydb *p, struct hashtab *h, void *fp)
{
char *key = NULL;
struct class_datum *cladatum;
- u32 buf[6], len, len2, ncons, nel;
+ __le32 buf[6];
+ u32 len, len2, ncons, nel;
int i, rc;
cladatum = kmalloc(sizeof(*cladatum), GFP_KERNEL);
@@ -1087,7 +1122,8 @@ static int role_read(struct policydb *p, struct hashtab *h, void *fp)
char *key = NULL;
struct role_datum *role;
int rc;
- u32 buf[2], len;
+ __le32 buf[2];
+ u32 len;
role = kmalloc(sizeof(*role), GFP_KERNEL);
if (!role) {
@@ -1147,7 +1183,8 @@ static int type_read(struct policydb *p, struct hashtab *h, void *fp)
char *key = NULL;
struct type_datum *typdatum;
int rc;
- u32 buf[3], len;
+ __le32 buf[3];
+ u32 len;
typdatum = kmalloc(sizeof(*typdatum),GFP_KERNEL);
if (!typdatum) {
@@ -1191,7 +1228,7 @@ bad:
*/
static int mls_read_level(struct mls_level *lp, void *fp)
{
- u32 buf[1];
+ __le32 buf[1];
int rc;
memset(lp, 0, sizeof(*lp));
@@ -1219,7 +1256,8 @@ static int user_read(struct policydb *p, struct hashtab *h, void *fp)
char *key = NULL;
struct user_datum *usrdatum;
int rc;
- u32 buf[2], len;
+ __le32 buf[2];
+ u32 len;
usrdatum = kmalloc(sizeof(*usrdatum), GFP_KERNEL);
if (!usrdatum) {
@@ -1273,7 +1311,8 @@ static int sens_read(struct policydb *p, struct hashtab *h, void *fp)
char *key = NULL;
struct level_datum *levdatum;
int rc;
- u32 buf[2], len;
+ __le32 buf[2];
+ u32 len;
levdatum = kmalloc(sizeof(*levdatum), GFP_ATOMIC);
if (!levdatum) {
@@ -1324,7 +1363,8 @@ static int cat_read(struct policydb *p, struct hashtab *h, void *fp)
char *key = NULL;
struct cat_datum *catdatum;
int rc;
- u32 buf[3], len;
+ __le32 buf[3];
+ u32 len;
catdatum = kmalloc(sizeof(*catdatum), GFP_ATOMIC);
if (!catdatum) {
@@ -1387,7 +1427,8 @@ int policydb_read(struct policydb *p, void *fp)
struct ocontext *l, *c, *newc;
struct genfs *genfs_p, *genfs, *newgenfs;
int i, j, rc;
- u32 buf[8], len, len2, config, nprim, nel, nel2;
+ __le32 buf[8];
+ u32 len, len2, config, nprim, nel, nel2;
char *policydb_str;
struct policydb_compat_info *info;
struct range_trans *rt, *lrt;
@@ -1403,17 +1444,14 @@ int policydb_read(struct policydb *p, void *fp)
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",
@@ -1448,19 +1486,17 @@ int policydb_read(struct policydb *p, void *fp)
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]);
- p->policyvers = buf[0];
+ 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] & POLICYDB_CONFIG_MLS)) {
+ 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");
@@ -1489,9 +1525,11 @@ int policydb_read(struct policydb *p, void *fp)
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;
}
@@ -1511,7 +1549,7 @@ int policydb_read(struct policydb *p, void *fp)
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;
@@ -1825,6 +1863,21 @@ int policydb_read(struct policydb *p, void *fp)
}
}
+ 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:
return rc;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.