1 files changed, 4 insertions, 1 deletions
diff --git a/ext/fts5/fts5_index.c b/ext/fts5/fts5_index.c
index 0291704f4..40658a871 100644
--- a/ext/fts5/fts5_index.c
+++ b/ext/fts5/fts5_index.c
@@ -2213,6 +2213,10 @@ static void fts5SegIterReverse(Fts5Index *p, Fts5SegIter *pIter){
     pIter->pLeaf = pLast;
     pIter->iLeafPgno = pgnoLast;
     iOff = fts5LeafFirstRowidOff(pLast);
+    if( iOff>pLast->szLeaf ){
+      p->rc = FTS5_CORRUPT;
+      return;
+    }
     iOff += fts5GetVarint(&pLast->p[iOff], (u64*)&pIter->iRowid);
     pIter->iLeafOffset = iOff;
 
@@ -2221,7 +2225,6 @@ static void fts5SegIterReverse(Fts5Index *p, Fts5SegIter *pIter){
     }else{
       pIter->iEndofDoclist = fts5LeafFirstTermOff(pLast);
     }
-
   }
 
   fts5SegIterReverseInitPage(p, pIter);