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Diffstat (limited to 'security/selinux/ss/avtab.c')
-rw-r--r--security/selinux/ss/avtab.c91
1 files changed, 76 insertions, 15 deletions
diff --git a/security/selinux/ss/avtab.c b/security/selinux/ss/avtab.c
index a3dd9fa..2e4ff00 100644
--- a/security/selinux/ss/avtab.c
+++ b/security/selinux/ss/avtab.c
@@ -24,6 +24,7 @@
#include "policydb.h"
static struct kmem_cache *avtab_node_cachep;
+static struct kmem_cache *avtab_operation_cachep;
static inline int avtab_hash(struct avtab_key *keyp, u16 mask)
{
@@ -37,11 +38,24 @@ avtab_insert_node(struct avtab *h, int hvalue,
struct avtab_key *key, struct avtab_datum *datum)
{
struct avtab_node *newnode;
+ struct avtab_operation *ops;
newnode = kmem_cache_zalloc(avtab_node_cachep, GFP_KERNEL);
if (newnode == NULL)
return NULL;
newnode->key = *key;
- newnode->datum = *datum;
+
+ if (key->specified & AVTAB_OP) {
+ ops = kmem_cache_zalloc(avtab_operation_cachep, GFP_KERNEL);
+ if (ops == NULL) {
+ kmem_cache_free(avtab_node_cachep, newnode);
+ return NULL;
+ }
+ *ops = *(datum->u.ops);
+ newnode->datum.u.ops = ops;
+ } else {
+ newnode->datum.u.data = datum->u.data;
+ }
+
if (prev) {
newnode->next = prev->next;
prev->next = newnode;
@@ -70,8 +84,11 @@ static int avtab_insert(struct avtab *h, struct avtab_key *key, struct avtab_dat
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class == cur->key.target_class &&
- (specified & cur->key.specified))
+ (specified & cur->key.specified)) {
+ if (specified & AVTAB_OPNUM)
+ break;
return -EEXIST;
+ }
if (key->source_type < cur->key.source_type)
break;
if (key->source_type == cur->key.source_type &&
@@ -232,6 +249,9 @@ void avtab_destroy(struct avtab *h)
while (cur) {
temp = cur;
cur = cur->next;
+ if (temp->key.specified & AVTAB_OP)
+ kmem_cache_free(avtab_operation_cachep,
+ temp->datum.u.ops);
kmem_cache_free(avtab_node_cachep, temp);
}
h->htable[i] = NULL;
@@ -320,7 +340,13 @@ static uint16_t spec_order[] = {
AVTAB_AUDITALLOW,
AVTAB_TRANSITION,
AVTAB_CHANGE,
- AVTAB_MEMBER
+ AVTAB_MEMBER,
+ AVTAB_OPNUM_ALLOWED,
+ AVTAB_OPNUM_AUDITALLOW,
+ AVTAB_OPNUM_DONTAUDIT,
+ AVTAB_OPTYPE_ALLOWED,
+ AVTAB_OPTYPE_AUDITALLOW,
+ AVTAB_OPTYPE_DONTAUDIT
};
int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
@@ -330,10 +356,11 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
{
__le16 buf16[4];
u16 enabled;
- __le32 buf32[7];
u32 items, items2, val, vers = pol->policyvers;
struct avtab_key key;
struct avtab_datum datum;
+ struct avtab_operation ops;
+ __le32 buf32[ARRAY_SIZE(ops.op.perms)];
int i, rc;
unsigned set;
@@ -390,11 +417,15 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
printk(KERN_ERR "SELinux: avtab: entry has both access vectors and types\n");
return -EINVAL;
}
+ if (val & AVTAB_OP) {
+ printk(KERN_ERR "SELinux: avtab: entry has operations\n");
+ return -EINVAL;
+ }
for (i = 0; i < ARRAY_SIZE(spec_order); i++) {
if (val & spec_order[i]) {
key.specified = spec_order[i] | enabled;
- datum.data = le32_to_cpu(buf32[items++]);
+ datum.u.data = le32_to_cpu(buf32[items++]);
rc = insertf(a, &key, &datum, p);
if (rc)
return rc;
@@ -413,7 +444,6 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
printk(KERN_ERR "SELinux: avtab: truncated entry\n");
return rc;
}
-
items = 0;
key.source_type = le16_to_cpu(buf16[items++]);
key.target_type = le16_to_cpu(buf16[items++]);
@@ -437,14 +467,32 @@ int avtab_read_item(struct avtab *a, void *fp, struct policydb *pol,
return -EINVAL;
}
- rc = next_entry(buf32, fp, sizeof(u32));
- if (rc) {
- printk(KERN_ERR "SELinux: avtab: truncated entry\n");
- return rc;
+ if ((vers < POLICYDB_VERSION_IOCTL_OPERATIONS)
+ || !(key.specified & AVTAB_OP)) {
+ rc = next_entry(buf32, fp, sizeof(u32));
+ if (rc) {
+ printk(KERN_ERR "SELinux: avtab: truncated entry\n");
+ return rc;
+ }
+ datum.u.data = le32_to_cpu(*buf32);
+ } else {
+ memset(&ops, 0, sizeof(struct avtab_operation));
+ rc = next_entry(&ops.type, fp, sizeof(u8));
+ if (rc) {
+ printk(KERN_ERR "SELinux: avtab: truncated entry\n");
+ return rc;
+ }
+ rc = next_entry(buf32, fp, sizeof(u32)*ARRAY_SIZE(ops.op.perms));
+ if (rc) {
+ printk(KERN_ERR "SELinux: avtab: truncated entry\n");
+ return rc;
+ }
+ for (i = 0; i < ARRAY_SIZE(ops.op.perms); i++)
+ ops.op.perms[i] = le32_to_cpu(buf32[i]);
+ datum.u.ops = &ops;
}
- datum.data = le32_to_cpu(*buf32);
if ((key.specified & AVTAB_TYPE) &&
- !policydb_type_isvalid(pol, datum.data)) {
+ !policydb_type_isvalid(pol, datum.u.data)) {
printk(KERN_ERR "SELinux: avtab: invalid type\n");
return -EINVAL;
}
@@ -504,8 +552,9 @@ bad:
int avtab_write_item(struct policydb *p, struct avtab_node *cur, void *fp)
{
__le16 buf16[4];
- __le32 buf32[1];
+ __le32 buf32[ARRAY_SIZE(cur->datum.u.ops->op.perms)];
int rc;
+ unsigned int i;
buf16[0] = cpu_to_le16(cur->key.source_type);
buf16[1] = cpu_to_le16(cur->key.target_type);
@@ -514,8 +563,16 @@ int avtab_write_item(struct policydb *p, struct avtab_node *cur, void *fp)
rc = put_entry(buf16, sizeof(u16), 4, fp);
if (rc)
return rc;
- buf32[0] = cpu_to_le32(cur->datum.data);
- rc = put_entry(buf32, sizeof(u32), 1, fp);
+
+ if (cur->key.specified & AVTAB_OP) {
+ for (i = 0; i < ARRAY_SIZE(cur->datum.u.ops->op.perms); i++)
+ buf32[i] = cpu_to_le32(cur->datum.u.ops->op.perms[i]);
+ rc = put_entry(buf32, sizeof(u32),
+ ARRAY_SIZE(cur->datum.u.ops->op.perms), fp);
+ } else {
+ buf32[0] = cpu_to_le32(cur->datum.u.data);
+ rc = put_entry(buf32, sizeof(u32), 1, fp);
+ }
if (rc)
return rc;
return 0;
@@ -548,9 +605,13 @@ void avtab_cache_init(void)
avtab_node_cachep = kmem_cache_create("avtab_node",
sizeof(struct avtab_node),
0, SLAB_PANIC, NULL);
+ avtab_operation_cachep = kmem_cache_create("avtab_operation",
+ sizeof(struct avtab_operation),
+ 0, SLAB_PANIC, NULL);
}
void avtab_cache_destroy(void)
{
kmem_cache_destroy(avtab_node_cachep);
+ kmem_cache_destroy(avtab_operation_cachep);
}
generated by cgit v1.1 at 2024-04-27 07:29:52 +0000