1 files changed, 123 insertions, 69 deletions

diff --git a/security/selinux/ss/avtab.c b/security/selinux/ss/avtab.c
index f238c034c44e..2e71af67b5d8 100644
--- a/security/selinux/ss/avtab.c
+++ b/security/selinux/ss/avtab.c
@@ -58,6 +58,7 @@ static int avtab_insert(struct avtab *h, struct avtab_key *key, struct avtab_dat
 {
         int hvalue;
         struct avtab_node *prev, *cur, *newnode;
+        u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
 
         if (!h)
                 return -EINVAL;
@@ -69,7 +70,7 @@ 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 &&
-                    (datum->specified & cur->datum.specified))
+                    (specified & cur->key.specified))
                         return -EEXIST;
                 if (key->source_type < cur->key.source_type)
                         break;
@@ -98,6 +99,7 @@ avtab_insert_nonunique(struct avtab * h, struct avtab_key * key, struct avtab_da
 {
         int hvalue;
         struct avtab_node *prev, *cur, *newnode;
+        u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
 
         if (!h)
                 return NULL;
@@ -108,7 +110,7 @@ avtab_insert_nonunique(struct avtab * h, struct avtab_key * key, struct avtab_da
                 if (key->source_type == cur->key.source_type &&
                     key->target_type == cur->key.target_type &&
                     key->target_class == cur->key.target_class &&
-                    (datum->specified & cur->datum.specified))
+                    (specified & cur->key.specified))
                         break;
                 if (key->source_type < cur->key.source_type)
                         break;
@@ -125,10 +127,11 @@ avtab_insert_nonunique(struct avtab * h, struct avtab_key * key, struct avtab_da
         return newnode;
 }
 
-struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *key, int specified)
+struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *key)
 {
         int hvalue;
         struct avtab_node *cur;
+        u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
 
         if (!h)
                 return NULL;
@@ -138,7 +141,7 @@ struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *key, int spe
                 if (key->source_type == cur->key.source_type &&
                     key->target_type == cur->key.target_type &&
                     key->target_class == cur->key.target_class &&
-                    (specified & cur->datum.specified))
+                    (specified & cur->key.specified))
                         return &cur->datum;
 
                 if (key->source_type < cur->key.source_type)
@@ -159,10 +162,11 @@ struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *key, int spe
  * conjunction with avtab_search_next_node()
  */
 struct avtab_node*
-avtab_search_node(struct avtab *h, struct avtab_key *key, int specified)
+avtab_search_node(struct avtab *h, struct avtab_key *key)
 {
         int hvalue;
         struct avtab_node *cur;
+        u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
 
         if (!h)
                 return NULL;
@@ -172,7 +176,7 @@ avtab_search_node(struct avtab *h, struct avtab_key *key, int specified)
                 if (key->source_type == cur->key.source_type &&
                     key->target_type == cur->key.target_type &&
                     key->target_class == cur->key.target_class &&
-                    (specified & cur->datum.specified))
+                    (specified & cur->key.specified))
                         return cur;
 
                 if (key->source_type < cur->key.source_type)
@@ -196,11 +200,12 @@ avtab_search_node_next(struct avtab_node *node, int specified)
         if (!node)
                 return NULL;
 
+        specified &= ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
         for (cur = node->next; cur; cur = cur->next) {
                 if (node->key.source_type == cur->key.source_type &&
                     node->key.target_type == cur->key.target_type &&
                     node->key.target_class == cur->key.target_class &&
-                    (specified & cur->datum.specified))
+                    (specified & cur->key.specified))
                         return cur;
 
                 if (node->key.source_type < cur->key.source_type)
@@ -278,75 +283,126 @@ void avtab_hash_eval(struct avtab *h, char *tag)
                max_chain_len);
 }
 
-int avtab_read_item(void *fp, struct avtab_datum *avdatum, struct avtab_key *avkey)
+static uint16_t spec_order[] = {
+        AVTAB_ALLOWED,
+        AVTAB_AUDITDENY,
+        AVTAB_AUDITALLOW,
+        AVTAB_TRANSITION,
+        AVTAB_CHANGE,
+        AVTAB_MEMBER
+};
+
+int avtab_read_item(void *fp, u32 vers, struct avtab *a,
+                    int (*insertf)(struct avtab *a, struct avtab_key *k,
+                                   struct avtab_datum *d, void *p),
+                    void *p)
 {
-        u32 buf[7];
-        u32 items, items2;
-        int rc;
+        u16 buf16[4], enabled;
+        u32 buf32[7], items, items2, val;
+        struct avtab_key key;
+        struct avtab_datum datum;
+        int i, rc;
+
+        memset(&key, 0, sizeof(struct avtab_key));
+        memset(&datum, 0, sizeof(struct avtab_datum));
+
+        if (vers < POLICYDB_VERSION_AVTAB) {
+                rc = next_entry(buf32, fp, sizeof(u32));
+                if (rc < 0) {
+                        printk(KERN_ERR "security: avtab: truncated entry\n");
+                        return -1;
+                }
+                items2 = le32_to_cpu(buf32[0]);
+                if (items2 > ARRAY_SIZE(buf32)) {
+                        printk(KERN_ERR "security: avtab: entry overflow\n");
+                        return -1;
 
-        memset(avkey, 0, sizeof(struct avtab_key));
-        memset(avdatum, 0, sizeof(struct avtab_datum));
+                }
+                rc = next_entry(buf32, fp, sizeof(u32)*items2);
+                if (rc < 0) {
+                        printk(KERN_ERR "security: avtab: truncated entry\n");
+                        return -1;
+                }
+                items = 0;
 
-        rc = next_entry(buf, fp, sizeof(u32));
-        if (rc < 0) {
-                printk(KERN_ERR "security: avtab: truncated entry\n");
-                goto bad;
-        }
-        items2 = le32_to_cpu(buf[0]);
-        if (items2 > ARRAY_SIZE(buf)) {
-                printk(KERN_ERR "security: avtab: entry overflow\n");
-                goto bad;
+                val = le32_to_cpu(buf32[items++]);
+                key.source_type = (u16)val;
+                if (key.source_type != val) {
+                        printk("security: avtab: truncated source type\n");
+                        return -1;
+                }
+                val = le32_to_cpu(buf32[items++]);
+                key.target_type = (u16)val;
+                if (key.target_type != val) {
+                        printk("security: avtab: truncated target type\n");
+                        return -1;
+                }
+                val = le32_to_cpu(buf32[items++]);
+                key.target_class = (u16)val;
+                if (key.target_class != val) {
+                        printk("security: avtab: truncated target class\n");
+                        return -1;
+                }
+
+                val = le32_to_cpu(buf32[items++]);
+                enabled = (val & AVTAB_ENABLED_OLD) ? AVTAB_ENABLED : 0;
+
+                if (!(val & (AVTAB_AV | AVTAB_TYPE))) {
+                        printk("security: avtab: null entry\n");
+                        return -1;
+                }
+                if ((val & AVTAB_AV) &&
+                    (val & AVTAB_TYPE)) {
+                        printk("security: avtab: entry has both access vectors and types\n");
+                        return -1;
+                }
+
+                for (i = 0; i < sizeof(spec_order)/sizeof(u16); i++) {
+                        if (val & spec_order[i]) {
+                                key.specified = spec_order[i] | enabled;
+                                datum.data = le32_to_cpu(buf32[items++]);
+                                rc = insertf(a, &key, &datum, p);
+                                if (rc) return rc;
+                        }
+                }
+
+                if (items != items2) {
+                        printk("security: avtab: entry only had %d items, expected %d\n", items2, items);
+                        return -1;
+                }
+                return 0;
         }
-        rc = next_entry(buf, fp, sizeof(u32)*items2);
+
+        rc = next_entry(buf16, fp, sizeof(u16)*4);
         if (rc < 0) {
-                printk(KERN_ERR "security: avtab: truncated entry\n");
-                goto bad;
+                printk("security: avtab: truncated entry\n");
+                return -1;
         }
+
         items = 0;
-        avkey->source_type = le32_to_cpu(buf[items++]);
-        avkey->target_type = le32_to_cpu(buf[items++]);
-        avkey->target_class = le32_to_cpu(buf[items++]);
-        avdatum->specified = le32_to_cpu(buf[items++]);
-        if (!(avdatum->specified & (AVTAB_AV | AVTAB_TYPE))) {
-                printk(KERN_ERR "security: avtab: null entry\n");
-                goto bad;
-        }
-        if ((avdatum->specified & AVTAB_AV) &&
-            (avdatum->specified & AVTAB_TYPE)) {
-                printk(KERN_ERR "security: avtab: entry has both access vectors and types\n");
-                goto bad;
-        }
-        if (avdatum->specified & AVTAB_AV) {
-                if (avdatum->specified & AVTAB_ALLOWED)
-                        avtab_allowed(avdatum) = le32_to_cpu(buf[items++]);
-                if (avdatum->specified & AVTAB_AUDITDENY)
-                        avtab_auditdeny(avdatum) = le32_to_cpu(buf[items++]);
-                if (avdatum->specified & AVTAB_AUDITALLOW)
-                        avtab_auditallow(avdatum) = le32_to_cpu(buf[items++]);
-        } else {
-                if (avdatum->specified & AVTAB_TRANSITION)
-                        avtab_transition(avdatum) = le32_to_cpu(buf[items++]);
-                if (avdatum->specified & AVTAB_CHANGE)
-                        avtab_change(avdatum) = le32_to_cpu(buf[items++]);
-                if (avdatum->specified & AVTAB_MEMBER)
-                        avtab_member(avdatum) = le32_to_cpu(buf[items++]);
-        }
-        if (items != items2) {
-                printk(KERN_ERR "security: avtab: entry only had %d items, expected %d\n",
-                       items2, items);
-                goto bad;
+        key.source_type = le16_to_cpu(buf16[items++]);
+        key.target_type = le16_to_cpu(buf16[items++]);
+        key.target_class = le16_to_cpu(buf16[items++]);
+        key.specified = le16_to_cpu(buf16[items++]);
+
+        rc = next_entry(buf32, fp, sizeof(u32));
+        if (rc < 0) {
+                printk("security: avtab: truncated entry\n");
+                return -1;
         }
+        datum.data = le32_to_cpu(*buf32);
+        return insertf(a, &key, &datum, p);
+}
 
-        return 0;
-bad:
-        return -1;
+static int avtab_insertf(struct avtab *a, struct avtab_key *k,
+                         struct avtab_datum *d, void *p)
+{
+        return avtab_insert(a, k, d);
 }
 
-int avtab_read(struct avtab *a, void *fp, u32 config)
+int avtab_read(struct avtab *a, void *fp, u32 vers)
 {
         int rc;
-        struct avtab_key avkey;
-        struct avtab_datum avdatum;
         u32 buf[1];
         u32 nel, i;
 
@@ -363,16 +419,14 @@ int avtab_read(struct avtab *a, void *fp, u32 config)
                 goto bad;
         }
         for (i = 0; i < nel; i++) {
-                if (avtab_read_item(fp, &avdatum, &avkey)) {
-                        rc = -EINVAL;
-                        goto bad;
-                }
-                rc = avtab_insert(a, &avkey, &avdatum);
+                rc = avtab_read_item(fp,vers, a, avtab_insertf, NULL);
                 if (rc) {
                         if (rc == -ENOMEM)
                                 printk(KERN_ERR "security: avtab: out of memory\n");
-                        if (rc == -EEXIST)
+                        else if (rc == -EEXIST)
                                 printk(KERN_ERR "security: avtab: duplicate entry\n");
+                        else
+                                rc = -EINVAL;
                         goto bad;
                 }
         }