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riff: fix infinite loop

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Fixes Ticket2241

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-02-05 18:31:27 +01:00
parent 2b20397e1f
commit a8343bfb6a
1 changed files with 7 additions and 1 deletions
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8
libavformat/riff.c
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@ -818,7 +818,13 @@ int ff_read_riff_info(AVFormatContext *s, int64_t size)
chunk_code = avio_rl32(pb);
chunk_size = avio_rl32(pb);
if (url_feof(pb)) {
if (chunk_code || chunk_size) {
av_log(s, AV_LOG_WARNING, "INFO subchunk truncated\n");
return AVERROR_INVALIDDATA;
}
break;
}
if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
avio_seek(pb, -9, SEEK_CUR);
chunk_code = avio_rl32(pb);