diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 3009aaf..ea11f4e 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -964,8 +964,10 @@
 
 	mutex_lock(&trace_types_lock);
 
-	if (!current_trace || current_trace != iter->trace)
+	if (!current_trace || current_trace != iter->trace) {
+		mutex_unlock(&trace_types_lock);
 		return NULL;
+	}
 
 	atomic_inc(&trace_record_cmdline_disabled);