diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index b87ab105fa22..8c6b682b83b8 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -2225,7 +2225,8 @@ static void __ftrace_trace_stack(struct ring_buffer *buffer,
 	size *= sizeof(unsigned long);
 
 	event = trace_buffer_lock_reserve(buffer, TRACE_STACK,
-					  sizeof(*entry) + size, flags, pc);
+				    (sizeof(*entry) - sizeof(entry->caller)) + size,
+				    flags, pc);
 	if (!event)
 		goto out;
 	entry = ring_buffer_event_data(event);