dns__cacherbt_expireheader can unlink / free header_prev underneath it. Use ISC_LIST_TAIL after calling dns__cacherbt_expireheader instead to get the next pointer to be processed.
dns__cacherbt_expireheader can unlink / free header_prev underneath it. Use ISC_LIST_TAIL after calling dns__cacherbt_expireheader instead to get the next pointer to be processed.