aboutsummaryrefslogtreecommitdiff
path: root/security/tomoyo/memory.c
diff options
context:
space:
mode:
Diffstat (limited to 'security/tomoyo/memory.c')
-rw-r--r--security/tomoyo/memory.c33
1 files changed, 8 insertions, 25 deletions
diff --git a/security/tomoyo/memory.c b/security/tomoyo/memory.c
index 277b9ade440..0e995716cc2 100644
--- a/security/tomoyo/memory.c
+++ b/security/tomoyo/memory.c
@@ -27,8 +27,6 @@ void tomoyo_warn_oom(const char *function)
panic("MAC Initialization failed.\n");
}
-/* Lock for protecting tomoyo_memory_used. */
-static DEFINE_SPINLOCK(tomoyo_policy_memory_lock);
/* Memoy currently used by policy/audit log/query. */
unsigned int tomoyo_memory_used[TOMOYO_MAX_MEMORY_STAT];
/* Memory quota for "policy"/"audit log"/"query". */
@@ -42,22 +40,19 @@ unsigned int tomoyo_memory_quota[TOMOYO_MAX_MEMORY_STAT];
* Returns true on success, false otherwise.
*
* Returns true if @ptr is not NULL and quota not exceeded, false otherwise.
+ *
+ * Caller holds tomoyo_policy_lock mutex.
*/
bool tomoyo_memory_ok(void *ptr)
{
if (ptr) {
const size_t s = ksize(ptr);
- bool result;
- spin_lock(&tomoyo_policy_memory_lock);
tomoyo_memory_used[TOMOYO_MEMORY_POLICY] += s;
- result = !tomoyo_memory_quota[TOMOYO_MEMORY_POLICY] ||
- tomoyo_memory_used[TOMOYO_MEMORY_POLICY] <=
- tomoyo_memory_quota[TOMOYO_MEMORY_POLICY];
- if (!result)
- tomoyo_memory_used[TOMOYO_MEMORY_POLICY] -= s;
- spin_unlock(&tomoyo_policy_memory_lock);
- if (result)
+ if (!tomoyo_memory_quota[TOMOYO_MEMORY_POLICY] ||
+ tomoyo_memory_used[TOMOYO_MEMORY_POLICY] <=
+ tomoyo_memory_quota[TOMOYO_MEMORY_POLICY])
return true;
+ tomoyo_memory_used[TOMOYO_MEMORY_POLICY] -= s;
}
tomoyo_warn_oom(__func__);
return false;
@@ -71,6 +66,8 @@ bool tomoyo_memory_ok(void *ptr)
*
* Returns pointer to allocated memory on success, NULL otherwise.
* @data is zero-cleared on success.
+ *
+ * Caller holds tomoyo_policy_lock mutex.
*/
void *tomoyo_commit_ok(void *data, const unsigned int size)
{
@@ -85,20 +82,6 @@ void *tomoyo_commit_ok(void *data, const unsigned int size)
}
/**
- * tomoyo_memory_free - Free memory for elements.
- *
- * @ptr: Pointer to allocated memory.
- */
-void tomoyo_memory_free(void *ptr)
-{
- size_t s = ksize(ptr);
- spin_lock(&tomoyo_policy_memory_lock);
- tomoyo_memory_used[TOMOYO_MEMORY_POLICY] -= s;
- spin_unlock(&tomoyo_policy_memory_lock);
- kfree(ptr);
-}
-
-/**
* tomoyo_get_group - Allocate memory for "struct tomoyo_path_group"/"struct tomoyo_number_group".
*
* @param: Pointer to "struct tomoyo_acl_param".