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path: root/security/selinux/ss/conditional.c
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Diffstat (limited to 'security/selinux/ss/conditional.c')
-rw-r--r--security/selinux/ss/conditional.c65
1 files changed, 40 insertions, 25 deletions
diff --git a/security/selinux/ss/conditional.c b/security/selinux/ss/conditional.c
index 4a4e35cac22b..c91e150c3087 100644
--- a/security/selinux/ss/conditional.c
+++ b/security/selinux/ss/conditional.c
@@ -117,10 +117,14 @@ int evaluate_cond_node(struct policydb *p, struct cond_node *node)
int cond_policydb_init(struct policydb *p)
{
+ int rc;
+
p->bool_val_to_struct = NULL;
p->cond_list = NULL;
- if (avtab_init(&p->te_cond_avtab))
- return -1;
+
+ rc = avtab_init(&p->te_cond_avtab);
+ if (rc)
+ return rc;
return 0;
}
@@ -219,34 +223,37 @@ int cond_read_bool(struct policydb *p, struct hashtab *h, void *fp)
booldatum = kzalloc(sizeof(struct cond_bool_datum), GFP_KERNEL);
if (!booldatum)
- return -1;
+ return -ENOMEM;
rc = next_entry(buf, fp, sizeof buf);
- if (rc < 0)
+ if (rc)
goto err;
booldatum->value = le32_to_cpu(buf[0]);
booldatum->state = le32_to_cpu(buf[1]);
+ rc = -EINVAL;
if (!bool_isvalid(booldatum))
goto err;
len = le32_to_cpu(buf[2]);
+ rc = -ENOMEM;
key = kmalloc(len + 1, GFP_KERNEL);
if (!key)
goto err;
rc = next_entry(key, fp, len);
- if (rc < 0)
+ if (rc)
goto err;
key[len] = '\0';
- if (hashtab_insert(h, key, booldatum))
+ rc = hashtab_insert(h, key, booldatum);
+ if (rc)
goto err;
return 0;
err:
cond_destroy_bool(key, booldatum, NULL);
- return -1;
+ return rc;
}
struct cond_insertf_data {
@@ -263,7 +270,7 @@ static int cond_insertf(struct avtab *a, struct avtab_key *k, struct avtab_datum
struct cond_av_list *other = data->other, *list, *cur;
struct avtab_node *node_ptr;
u8 found;
-
+ int rc = -EINVAL;
/*
* For type rules we have to make certain there aren't any
@@ -313,12 +320,15 @@ static int cond_insertf(struct avtab *a, struct avtab_key *k, struct avtab_datum
node_ptr = avtab_insert_nonunique(&p->te_cond_avtab, k, d);
if (!node_ptr) {
printk(KERN_ERR "SELinux: could not insert rule.\n");
+ rc = -ENOMEM;
goto err;
}
list = kzalloc(sizeof(struct cond_av_list), GFP_KERNEL);
- if (!list)
+ if (!list) {
+ rc = -ENOMEM;
goto err;
+ }
list->node = node_ptr;
if (!data->head)
@@ -331,7 +341,7 @@ static int cond_insertf(struct avtab *a, struct avtab_key *k, struct avtab_datum
err:
cond_av_list_destroy(data->head);
data->head = NULL;
- return -1;
+ return rc;
}
static int cond_read_av_list(struct policydb *p, void *fp, struct cond_av_list **ret_list, struct cond_av_list *other)
@@ -345,8 +355,8 @@ static int cond_read_av_list(struct policydb *p, void *fp, struct cond_av_list *
len = 0;
rc = next_entry(buf, fp, sizeof(u32));
- if (rc < 0)
- return -1;
+ if (rc)
+ return rc;
len = le32_to_cpu(buf[0]);
if (len == 0)
@@ -361,7 +371,6 @@ static int cond_read_av_list(struct policydb *p, void *fp, struct cond_av_list *
&data);
if (rc)
return rc;
-
}
*ret_list = data.head;
@@ -390,24 +399,25 @@ static int cond_read_node(struct policydb *p, struct cond_node *node, void *fp)
struct cond_expr *expr = NULL, *last = NULL;
rc = next_entry(buf, fp, sizeof(u32));
- if (rc < 0)
- return -1;
+ if (rc)
+ return rc;
node->cur_state = le32_to_cpu(buf[0]);
len = 0;
rc = next_entry(buf, fp, sizeof(u32));
- if (rc < 0)
- return -1;
+ if (rc)
+ return rc;
/* expr */
len = le32_to_cpu(buf[0]);
for (i = 0; i < len; i++) {
rc = next_entry(buf, fp, sizeof(u32) * 2);
- if (rc < 0)
+ if (rc)
goto err;
+ rc = -ENOMEM;
expr = kzalloc(sizeof(struct cond_expr), GFP_KERNEL);
if (!expr)
goto err;
@@ -416,6 +426,7 @@ static int cond_read_node(struct policydb *p, struct cond_node *node, void *fp)
expr->bool = le32_to_cpu(buf[1]);
if (!expr_isvalid(p, expr)) {
+ rc = -EINVAL;
kfree(expr);
goto err;
}
@@ -427,14 +438,16 @@ static int cond_read_node(struct policydb *p, struct cond_node *node, void *fp)
last = expr;
}
- if (cond_read_av_list(p, fp, &node->true_list, NULL) != 0)
+ rc = cond_read_av_list(p, fp, &node->true_list, NULL);
+ if (rc)
goto err;
- if (cond_read_av_list(p, fp, &node->false_list, node->true_list) != 0)
+ rc = cond_read_av_list(p, fp, &node->false_list, node->true_list);
+ if (rc)
goto err;
return 0;
err:
cond_node_destroy(node);
- return -1;
+ return rc;
}
int cond_read_list(struct policydb *p, void *fp)
@@ -445,8 +458,8 @@ int cond_read_list(struct policydb *p, void *fp)
int rc;
rc = next_entry(buf, fp, sizeof buf);
- if (rc < 0)
- return -1;
+ if (rc)
+ return rc;
len = le32_to_cpu(buf[0]);
@@ -455,11 +468,13 @@ int cond_read_list(struct policydb *p, void *fp)
goto err;
for (i = 0; i < len; i++) {
+ rc = -ENOMEM;
node = kzalloc(sizeof(struct cond_node), GFP_KERNEL);
if (!node)
goto err;
- if (cond_read_node(p, node, fp) != 0)
+ rc = cond_read_node(p, node, fp);
+ if (rc)
goto err;
if (i == 0)
@@ -472,7 +487,7 @@ int cond_read_list(struct policydb *p, void *fp)
err:
cond_list_destroy(p->cond_list);
p->cond_list = NULL;
- return -1;
+ return rc;
}
/* Determine whether additional permissions are granted by the conditional