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Merge pull request #25641 from vrabaud:lsh

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Prevent signed integer overflow in LshTable
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Alexander Smorkalov 2024-05-27 15:55:07 +03:00 committed by GitHub
commit c5976f7865
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1 changed files with 1 additions and 1 deletions
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modules/flann/include/opencv2/flann/lsh_table.h
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@ -424,7 +424,7 @@ inline size_t LshTable<unsigned char>::getKey(const unsigned char* feature) cons
size_t mask_block = mask_[i / sizeof(size_t)];
while (mask_block) {
// Get the lowest set bit in the mask block
size_t lowest_bit = mask_block & (-(ptrdiff_t)mask_block);
size_t lowest_bit = mask_block & ~(mask_block - 1);
// Add it to the current subsignature if necessary
subsignature += (feature_block & lowest_bit) ? bit_index : 0;
// Reset the bit in the mask block