From 787f8fad00c66fc225662f7defb90e79c112ed40 Mon Sep 17 00:00:00 2001
From: Anton Khirnov <wyskas@gmail.com>
Date: Wed, 23 Sep 2009 18:04:40 +0000
Subject: [PATCH] id3v2: check for enough space to write full UTF-8 characters.
 patch by Anton Khirnov, wyskas gmail com

Originally committed as revision 20004 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavformat/id3v2.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libavformat/id3v2.c b/libavformat/id3v2.c
index 0cf2cb1a07..8070a4a34d 100644
--- a/libavformat/id3v2.c
+++ b/libavformat/id3v2.c
@@ -92,9 +92,9 @@ static void read_ttag(AVFormatContext *s, int taglen, const char *key)
 
     case 0:  /* ISO-8859-1 (0 - 255 maps directly into unicode) */
         q = dst;
-        while (taglen--) {
+        while (taglen-- && q - dst < dstlen - 7) {
             uint8_t tmp;
-            PUT_UTF8(get_byte(s->pb), tmp, if (q - dst < dstlen - 1) *q++ = tmp;)
+            PUT_UTF8(get_byte(s->pb), tmp, *q++ = tmp;)
         }
         *q = '\0';
         break;
-- 
2.11.0