From 376f1c73b8335fb09714dc56ce0f1ebc5f9ee8b9 Mon Sep 17 00:00:00 2001
From: Marc Schoolderman <squell@xs4all.nl>
Date: Tue, 19 Oct 2021 22:59:45 +0200
Subject: [PATCH] catch evil tags being hidden by id3v2.4's unsynchronization
 scheme

---
 id3v2.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/id3v2.c b/id3v2.c
index 7702187..5ab5dcd 100644
--- a/id3v2.c
+++ b/id3v2.c
@@ -239,8 +239,10 @@ void *ID3_readf(const char *fname, size_t *tagsize)
     pad  = size;                                /* check semantics of tag */
     size = calcsize(buf, size);
 
-    if( rh.ver == 4 && size > 0 )  /* v2.4: just ignore the global UNSYNC */
+    if( rh.ver == 4 && size > 0 ) {     /* v2.4: ignore the global UNSYNC */
         size = unsync_frames_v2_4(buf, size);
+        size = calcsize(buf, size);
+    }
 
     if(tagsize) *tagsize = size;