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avformat/genh: Check sample rate

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Fixes: signed integer overflow: -2515507630940093440 * 4 cannot be represented in type 'long'
Fixes: 46318/clusterfuzz-testcase-minimized-ffmpeg_dem_GENH_fuzzer-5009637474172928

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 2022-04-11 22:00:52 +02:00
parent 6007d5688c
commit a3d790f197
1 changed files with 3 additions and 0 deletions
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3
libavformat/genh.c
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@ -67,6 +67,9 @@ static int genh_read_header(AVFormatContext *s)
return AVERROR_INVALIDDATA; return AVERROR_INVALIDDATA;
st->codecpar->block_align = align * st->codecpar->ch_layout.nb_channels; st->codecpar->block_align = align * st->codecpar->ch_layout.nb_channels;
st->codecpar->sample_rate = avio_rl32(s->pb); st->codecpar->sample_rate = avio_rl32(s->pb);
if (st->codecpar->sample_rate < 0)
return AVERROR_INVALIDDATA;
avio_skip(s->pb, 4); avio_skip(s->pb, 4);
st->duration = avio_rl32(s->pb); st->duration = avio_rl32(s->pb);