From 592d7fed8c4fa2ba5f9a3a02e2a5caf2eca531b4 Mon Sep 17 00:00:00 2001
From: Dan Kennedy <danielk1977@gmail.com>
Date: Wed, 29 Nov 2023 16:22:39 +0000
Subject: [PATCH] Fix signed integer overflow in fts5.

---
 ext/fts5/fts5_index.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ext/fts5/fts5_index.c b/ext/fts5/fts5_index.c
index 993069f490..4b7c8d3335 100644
--- a/ext/fts5/fts5_index.c
+++ b/ext/fts5/fts5_index.c
@@ -4276,7 +4276,7 @@ static void fts5WriteDlidxAppend(
     }
 
     if( pDlidx->bPrevValid ){
-      iVal = iRowid - pDlidx->iPrev;
+      iVal = (u64)iRowid - (u64)pDlidx->iPrev;
     }else{
       i64 iPgno = (i==0 ? pWriter->writer.pgno : pDlidx[-1].pgno);
       assert( pDlidx->buf.n==0 );
-- 
2.11.4.GIT