defrag: fix off by one

Ticket: 7067

This off by one could lead to an empty fragment being inserted
in the rb tree, which led to integer underflow

diff --git a/src/defrag.c b/src/defrag.c
index eda41b76ccc110eac2aed7d5e64e9aa8b6baaaf2..e870c99068b5a8534b282a839d3b8a13c01c1777 100644 (file)
--- a/src/defrag.c
+++ b/src/defrag.c
@@ -856,7 +856,7 @@ DefragInsertFrag(ThreadVars *tv, DecodeThreadVars *dtv, DefragTracker *tracker,
         }
     }
 
-    if (ltrim > data_len) {
+    if (ltrim >= data_len) {
         /* Full packet has been trimmed due to the overlap policy. Overlap
          * already set. */
         goto done;