dc5c09917e
Use sd_json_variant_is_blank_array() instead of is_blank_object() for p.addresses and p.names, which are declared as JSON arrays. The wrong predicate never triggered, allowing empty arrays to bypass the guards: for p.names this caused a size_t underflow leading to an out-of-bounds heap write; for p.addresses it returned success with no addresses. Add explicit n_addresses == 0 guards after the family-filter loops so entries with unsupported families also return NOTFOUND rather than crashing on a NULL dereference. In gethostbyname3_r (family-specific entry point), return NO_DATA for all zero-address results — both blank array and all-filtered — since both mean "name resolved, no record of the requested family". Keep HOST_NOT_FOUND in gethostbyname4_r (both-families) where a blank or all-unsupported result genuinely means the name was not found. Signed-off-by: dongshengyuan <dongshengyuan@uniontech.com> Co-developed-by: Claude Opus 4.8 <noreply@anthropic.com>
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