test_kmod: fix small memory leak on filesystem tests

The break was in the wrong place so file system tests don't work as
intended, leaking memory at each test switch.

[[email protected]: massaged commit subject, noted memory leak issue without the fix]
Link: http://lkml.kernel.org/r/[email protected]
Fixes: 39258f448d71 ("kmod: add test driver to stress test the module loader")
Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: Luis R. Rodriguez <[email protected]>
Reported-by: David Binderman <[email protected]>
Cc: Colin Ian King <[email protected]>
Cc: Dmitry Torokhov <[email protected]>
Cc: Eric W. Biederman <[email protected]>
Cc: Jessica Yu <[email protected]>
Cc: Josh Poimboeuf <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Michal Marek <[email protected]>
Cc: Miroslav Benes <[email protected]>
Cc: Petr Mladek <[email protected]>
Cc: Rusty Russell <[email protected]>
Cc: Shuah Khan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

lib/test_kmod.c

@@ -746,11 +746,11 @@ static int trigger_config_run_type(struct kmod_test_device *test_dev,
 						      strlen(test_str));
 		break;
 	case TEST_KMOD_FS_TYPE:
-		break;
 		kfree_const(config->test_fs);
 		config->test_driver = NULL;
 		copied = config_copy_test_fs(config, test_str,
 					     strlen(test_str));
+		break;
 	default:
 		mutex_unlock(&test_dev->config_mutex);
 		return -EINVAL;