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avcodec/takdec: Check remaining space for first predictors

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Fixes: Timeout
Fixes: 403673829/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TAK_fuzzer-5498240154009600

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 8e6db875af)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer 2025-05-11 23:09:07 +02:00
parent bcf1a19e06
commit be2fff27a0
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libavcodec/takdec.c
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@ -432,6 +432,9 @@ static int decode_subframe(TAKDecContext *s, int32_t *decoded,
return AVERROR_INVALIDDATA;
}
if (get_bits_left(gb) < 2*10 + 2*size)
return AVERROR_INVALIDDATA;
s->predictors[0] = get_sbits(gb, 10);
s->predictors[1] = get_sbits(gb, 10);
s->predictors[2] = get_sbits(gb, size) * (1 << (10 - size));