Egor Ignatov
04567a3b5e
manager_get_dns_server() may re-read /etc/resolv.conf and replace m->dns_servers and m->search_domains, but it was passed as an argument to dns_configuration_json_append() together with those lists, and the order of evaluation of the arguments is unspecified. gcc with LTO reads the list heads first, so after a foreign /etc/resolv.conf has changed the freed lists are walked. Typically the serialization then fails with EUCLEAN, which makes the SubscribeDNSConfiguration method of io.systemd.Resolve.Monitor and in turn systemd-networkd-wait-online --dns fail. Call manager_get_dns_server() first and store the result in a local variable.
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