--- x/kernel/trace/ring_buffer.c
+++ y/kernel/trace/ring_buffer.c
@@ -6909,7 +6909,6 @@ error:
 	buffer->subbuf_size = old_size;
 
 	atomic_dec(&buffer->record_disabled);
-	mutex_unlock(&buffer->mutex);
 
 	for_each_buffer_cpu(buffer, cpu) {
 		cpu_buffer = buffer->buffers[cpu];
@@ -6922,6 +6921,7 @@ error:
 			free_buffer_page(bpage);
 		}
 	}
+	mutex_unlock(&buffer->mutex);
 
 	return err;
 }