libsemanage: free resources on failed connect attempt

In case connecting to the semanage database fails, free all already
allocated resources.

Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Acked-by: James Carter <jwcart2@gmail.com>

libsemanage/src/database_activedb.c

@@ -139,6 +139,9 @@ int dbase_activedb_init(semanage_handle_t * handle,
 void dbase_activedb_release(dbase_activedb_t * dbase)
 {
 
+	if (!dbase)
+		return;
+
 	dbase_llist_drop_cache(&dbase->llist);
 	free(dbase);
 }

libsemanage/src/database_file.c

@@ -191,6 +191,9 @@ int dbase_file_init(semanage_handle_t * handle,
 void dbase_file_release(dbase_file_t * dbase)
 {
 
+	if (!dbase)
+		return;
+
 	dbase_llist_drop_cache(&dbase->llist);
 	free(dbase);
 }

libsemanage/src/database_join.c

@@ -271,6 +271,9 @@ int dbase_join_init(semanage_handle_t * handle,
 void dbase_join_release(dbase_join_t * dbase)
 {
 
+	if (!dbase)
+		return;
+
 	dbase_llist_drop_cache(&dbase->llist);
 	free(dbase);
 }

libsemanage/src/database_policydb.c

@@ -44,7 +44,7 @@ struct dbase_policydb {
 static void dbase_policydb_drop_cache(dbase_policydb_t * dbase)
 {
 
-	if (dbase->cache_serial >= 0) {
+	if (dbase && dbase->cache_serial >= 0) {
 		sepol_policydb_free(dbase->policydb);
 		dbase->cache_serial = -1;
 		dbase->modified = 0;

libsemanage/src/direct_api.c

@@ -321,6 +321,7 @@ int semanage_direct_connect(semanage_handle_t * sh)
 
       err:
 	ERR(sh, "could not establish direct connection");
+	(void) semanage_direct_disconnect(sh);
 	return STATUS_ERR;
 }
 

libsemanage/src/handle.c

@@ -361,12 +361,11 @@ int semanage_access_check(semanage_handle_t * sh)
 
 int semanage_disconnect(semanage_handle_t * sh)
 {
-	assert(sh != NULL && sh->funcs != NULL
-	       && sh->funcs->disconnect != NULL);
+	assert(sh != NULL);
 	if (!sh->is_connected) {
 		return 0;
 	}
-	if (sh->funcs->disconnect(sh) < 0) {
+	if (sh->funcs && sh->funcs->disconnect(sh) < 0) {
 		return -1;
 	}
 	sh->is_in_transaction = 0;