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riff: retry reading metadata without padding if it fails with 

Fixes Ticket1821

Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-10-18 04:58:20 +02:00
parent 1350dffdc6
commit d0c27e88d2
1 changed files with 7 additions and 2 deletions
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9
libavformat/riff.c
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@ -771,8 +771,13 @@ int ff_read_riff_info(AVFormatContext *s, int64_t size)
chunk_code = avio_rl32(pb);
chunk_size = avio_rl32(pb);
if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
av_log(s, AV_LOG_ERROR, "too big INFO subchunk\n");
return AVERROR_INVALIDDATA;
avio_seek(pb, -9, SEEK_CUR);
chunk_code = avio_rl32(pb);
chunk_size = avio_rl32(pb);
if (chunk_size > end || end - chunk_size < cur || chunk_size == UINT_MAX) {
av_log(s, AV_LOG_ERROR, "too big INFO subchunk\n");
return AVERROR_INVALIDDATA;
}
}
chunk_size += (chunk_size & 1);