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| author | Carl Eugen Hoyos <cehoyos@ag.or.at> | 2011-03-07 23:18:36 +0100 |
|---|---|---|
| committer | Carl Eugen Hoyos <cehoyos@ag.or.at> | 2011-03-07 23:32:26 +0100 |
| commit | ac533ac458b8c75ac68372b34d0ce7c150684585 (patch) | |
| tree | b8637219338d817258f7a8c7f6094b81af7b3bb8 | |
| parent | 2a8175ff9cb7988333b8c3a8a9fec1fa9b60b719 (diff) | |
| download | ffmpeg-ac533ac458b8c75ac68372b34d0ce7c150684585.tar.gz | |
Do not loop endlessly if id3v2 tag size is negative / too large.
Fixes the sample from issue 2649.
| -rw-r--r-- | libavformat/id3v2.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavformat/id3v2.c b/libavformat/id3v2.c index 7635735195..37443a4174 100644 --- a/libavformat/id3v2.c +++ b/libavformat/id3v2.c @@ -138,7 +138,8 @@ static void read_ttag(AVFormatContext *s, AVIOContext *pb, int taglen, const cha static void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t flags) { - int isv34, tlen, unsync; + int isv34, unsync; + unsigned tlen; char tag[5]; int64_t next; int taghdrlen; @@ -191,6 +192,8 @@ static void ff_id3v2_parse(AVFormatContext *s, int len, uint8_t version, uint8_t tag[3] = 0; tlen = avio_rb24(s->pb); } + if (tlen > (1<<28)) + break; len -= taghdrlen + tlen; if (len < 0) |