1 files changed, 7 insertions, 1 deletions

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 30d57dd01a85..d42b882dfe4b 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -117,7 +117,13 @@ rb_event_length(struct ring_buffer_event *event)
  */
 unsigned ring_buffer_event_length(struct ring_buffer_event *event)
 {
-        return rb_event_length(event);
+        unsigned length = rb_event_length(event);
+        if (event->type != RINGBUF_TYPE_DATA)
+                return length;
+        length -= RB_EVNT_HDR_SIZE;
+        if (length > RB_MAX_SMALL_DATA + sizeof(event->array[0]))
+                length -= sizeof(event->array[0]);
+        return length;
 }
 EXPORT_SYMBOL_GPL(ring_buffer_event_length);