added SO link about rand for clarification
@@ -1027,7 +1027,9 @@ static inline u32 rand_below(afl_state_t *afl, u32 limit) {
}
- /* Modulo is biased - we don't want our fuzzing to be biased so let's do it right. */
+ /* Modulo is biased - we don't want our fuzzing to be biased so let's do it right, see
+ https://stackoverflow.com/questions/10984974/why-do-people-say-there-is-modulo-bias-when-using-a-random-number-generator
+ */
u64 unbiased_rnd;
do {
unbiased_rnd = rand_next(afl);
