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using unbiased rand_below
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@ -1027,7 +1027,12 @@ static inline u32 rand_below(afl_state_t *afl, u32 limit) {
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}
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return rand_next(afl) % limit;
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/* Modulo is biased - we don't want our fuzzing to be biased so let's do it right. */
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u64 unbiased_rnd;
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do {
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unbiased_rnd = rand_next(afl);
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} while (unbiased_rnd >= (UINT64_MAX - (UINT64_MAX % limit)));
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return unbiased_rnd % limit;
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}
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