https://gitlab.xiph.org/xiph/vorbis/-/commit/bb4047de4c05712bf1fd49b9584c360b8e4e0adf

From bb4047de4c05712bf1fd49b9584c360b8e4e0adf Mon Sep 17 00:00:00 2001
From: Tristan Matthews <tmatth@videolan.org>
Date: Fri, 14 Jun 2024 11:39:26 -0400
Subject: [PATCH] sharedbook: cast to unsigned to avoid undefined shift

Fixes #2351
---
 lib/sharedbook.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/sharedbook.c b/lib/sharedbook.c
index 444f42b5..7a98b479 100644
--- a/lib/sharedbook.c
+++ b/lib/sharedbook.c
@@ -422,7 +422,7 @@ int vorbis_book_init_decode(codebook *c,const static_codebook *s){
         long lo=0,hi=0;
 
         for(i=0;i<tabn;i++){
-          ogg_uint32_t word=i<<(32-c->dec_firsttablen);
+          ogg_uint32_t word=((ogg_uint32_t)i<<(32-c->dec_firsttablen));
           if(c->dec_firsttable[bitreverse(word)]==0){
             while((lo+1)<n && c->codelist[lo+1]<=word)lo++;
             while(    hi<n && word>=(c->codelist[hi]&mask))hi++;
-- 
GitLab
