From ac8714dd64b1aff7cf4a44113d5b694882df48c1 Mon Sep 17 00:00:00 2001
From: William Wilgus <wilgus.william@gmail.com>
Date: Fri, 28 Feb 2025 00:27:10 -0500
Subject: [PATCH] [BugFix] vorbis.c metadata invalid index when album art b64
 is NULL

Change-Id: I9d08c2e2c903c00d0b2fd25e0dceea28113874a2
---
 lib/rbcodec/metadata/vorbis.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/lib/rbcodec/metadata/vorbis.c b/lib/rbcodec/metadata/vorbis.c
index db2215b594..31235dbae3 100644
--- a/lib/rbcodec/metadata/vorbis.c
+++ b/lib/rbcodec/metadata/vorbis.c
@@ -327,7 +327,14 @@ size_t base64_decode(const char *in, size_t in_len, unsigned char *out)
             break;
         }
 
-        val = (val << 6) | b64_codes[in[i] - B64_START_CHAR];
+        int index = in[i] - B64_START_CHAR;
+        if (index < 0 || index >= (int)ARRAYLEN(b64_codes))
+        {
+            out[len] = '\0';
+            break;
+        }
+
+        val = (val << 6) | b64_codes[index];
 
         if ((++i & 3) == 0)
         {