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avformat/vividas: Check sample_rate

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Fixes: Assertion c > 0 failed at libavutil/mathematics.c
Fixes: 27001/clusterfuzz-testcase-minimized-ffmpeg_dem_VIVIDAS_fuzzer-5726041328582656
Fixes: 27453/clusterfuzz-testcase-minimized-ffmpeg_dem_VIVIDAS_fuzzer-5716060384526336

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit b1bced5433)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-11-10 22:36:25 +01:00
parent be6695995d
commit a3763e63a6
1 changed files with 2 additions and 0 deletions
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2
libavformat/vividas.c
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@ -373,6 +373,8 @@ static int track_header(VividasDemuxContext *viv, AVFormatContext *s, uint8_t *
avio_rl16(pb); //codec_subid
st->codecpar->channels = avio_rl16(pb); // channels
st->codecpar->sample_rate = avio_rl32(pb); // sample_rate
if (st->codecpar->sample_rate <= 0)
return AVERROR_INVALIDDATA;
avio_seek(pb, 10, SEEK_CUR); // data_1
q = avio_r8(pb);
avio_seek(pb, q, SEEK_CUR); // data_2