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avformat/mvdec: Sanity check SAMPLE_WIDTH

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Fixes: signed integer overflow: 999999999 * 8 cannot be represented in type 'int'
Fixes: 30048/clusterfuzz-testcase-minimized-ffmpeg_dem_MV_fuzzer-5864289917337600

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-02-02 20:47:10 +01:00
parent 4f3d8cb554
commit ab82c10578
1 changed files with 4 additions and 1 deletions
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5
libavformat/mvdec.c
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@ -159,7 +159,10 @@ static int parse_audio_var(AVFormatContext *avctx, AVStream *st,
st->codecpar->sample_rate = var_read_int(pb, size);
avpriv_set_pts_info(st, 33, 1, st->codecpar->sample_rate);
} else if (!strcmp(name, "SAMPLE_WIDTH")) {
st->codecpar->bits_per_coded_sample = var_read_int(pb, size) * 8;
uint64_t bpc = var_read_int(pb, size) * (uint64_t)8;
if (bpc > 16)
return AVERROR_INVALIDDATA;
st->codecpar->bits_per_coded_sample = bpc;
} else
return AVERROR_INVALIDDATA;