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HyperLogLog: enlarge reghisto variable for safety.

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antirez 2019-03-15 17:10:16 +01:00
parent a47cd50a0d
commit 3765dfdcf7
1 changed files with 6 additions and 1 deletions
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7
src/hyperloglog.c
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@ -1017,7 +1017,12 @@ uint64_t hllCount(struct hllhdr *hdr, int *invalid) {
double m = HLL_REGISTERS; double m = HLL_REGISTERS;
double E; double E;
int j; int j;
int reghisto[HLL_Q+2] = {0}; /* Note that reghisto could be just HLL_Q+1, becuase this is the
* maximum frequency of the "000...1" sequence the hash function is
* able to return. However it is slow to check for sanity of the
* input: instead we history array at a safe size: overflows will
* just write data to wrong, but correctly allocated, places. */
int reghisto[64] = {0};
/* Compute register histogram */ /* Compute register histogram */
if (hdr->encoding == HLL_DENSE) { if (hdr->encoding == HLL_DENSE) {