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avformat/3dostr: Check sample_rate

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Fixes: signed integer overflow: -1268324762623155200 * 8 cannot be represented in type 'long'
Fixes: 30123/clusterfuzz-testcase-minimized-ffmpeg_dem_THREEDOSTR_fuzzer-6710765123928064

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-02-08 14:29:02 +01:00
parent d7cb8c51f0
commit 7e5034f97e
1 changed files with 1 additions and 1 deletions
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2
libavformat/3dostr.c
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@ -103,7 +103,7 @@ static int threedostr_read_header(AVFormatContext *s)
st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
st->codecpar->sample_rate = avio_rb32(s->pb);
st->codecpar->channels = avio_rb32(s->pb);
if (st->codecpar->channels <= 0)
if (st->codecpar->channels <= 0 || st->codecpar->sample_rate <= 0)
return AVERROR_INVALIDDATA;
codec = avio_rl32(s->pb);
avio_skip(s->pb, 4);