Do not use header_prev in expire_lru_headers
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.
Closes #4595 (closed)
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.
Closes #4595 (closed)