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avcodec/sonic: Use unsigned for predictor_k to avoid undefined behavior

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Fixes: signed integer overflow: -1094995529 * 24 cannot be represented in type 'int'
Fixes: 44436/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SONIC_fuzzer-4874459459223552

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 28008bf95e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-02-08 00:43:56 +01:00
parent a8a8fda5cf
commit 12e26cffcf
1 changed files with 1 additions and 1 deletions
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libavcodec/sonic.c
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@ -1018,7 +1018,7 @@ static int sonic_decode_frame(AVCodecContext *avctx,
// dequantize
for (i = 0; i < s->num_taps; i++)
s->predictor_k[i] *= s->tap_quant[i];
s->predictor_k[i] *= (unsigned) s->tap_quant[i];
if (s->lossless)
quant = 1;