memory 複数の Key Tag Option を持つDNSクエリを受信するとメモリリーク Release Notes for BIND-9.11.5-P4 named leaked memory when processing a request with multiple Key Tag EDNS options present. Key Tag Optionの説明は後で 4
"trust-anchor-telementry" to record trust-anchor-telementry in incoming requests. Both _ta-XXXX./NULL and EDNS KEY-TAG options are logged. [RT #46124] Key Tag Optionをパースするprocess_keytagに問題 (https://gitlab.isc.org/isc-projects/bind9/blob/v9_11_5_P1/bin/named/client.c#L2110) 11