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Valerie Snyder
fcf8134aab
The repeated-prefix selector ranked candidate windows by occurrences of the original repeated byte. A signature such as ffffff000000 could therefore replace an ff trie head with an all-zero trie head and recreate the low-selectivity behavior this optimization is intended to avoid. Require shifted windows to contain at least two distinct bytes. Add a matcher regression that verifies the transition window is selected and that the complete signature still matches. Validation: - make -j12 check_clamav - CK_RUN_CASE=matchers ./build/unit_tests/check_clamav - git clang-format --diff HEAD -- libclamav/matcher-ac.c unit_tests/check_matchers.c