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avcodec/dpx: Check bits_per_color earlier

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Fixes: shift exponent 251 is too large for 32-bit type 'int'
Fixes: 32147/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DPX_fuzzer-5519111675314176

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-04-11 21:04:12 +02:00
parent 6c65e49990
commit c093eb3031
1 changed files with 3 additions and 0 deletions
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3
libavcodec/dpx.c
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@ -242,6 +242,9 @@ static int decode_frame(AVCodecContext *avctx,
return AVERROR_PATCHWELCOME;
}
if (bits_per_color > 32)
return AVERROR_INVALIDDATA;
buf += 820;
avctx->sample_aspect_ratio.num = read32(&buf, endian);
avctx->sample_aspect_ratio.den = read32(&buf, endian);