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avcodec/flacdec: reduce limit for golomb so that the max value does not overflow
Fixes: runtime error: left shift of 32 by 26 places cannot be represented in type 'int' Fixes: 628/clusterfuzz-testcase-6187747641393152 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -258,8 +258,9 @@ static int decode_residuals(FLACContext *s, int32_t *decoded, int pred_order)
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for (; i < samples; i++)
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*decoded++ = get_sbits_long(&s->gb, tmp);
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} else {
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int real_limit = tmp ? (INT_MAX >> tmp) + 2 : INT_MAX;
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for (; i < samples; i++) {
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int v = get_sr_golomb_flac(&s->gb, tmp, INT_MAX, 0);
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int v = get_sr_golomb_flac(&s->gb, tmp, real_limit, 0);
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if (v == 0x80000000){
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av_log(s->avctx, AV_LOG_ERROR, "invalid residual\n");
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return AVERROR_INVALIDDATA;
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