This bug was fixed in the package systemd - 248.3-1ubuntu2 --------------- systemd (248.3-1ubuntu2) impish; urgency=medium
[ Kai-Heng Feng ] * d/p/hwdb-Add-ProBook-to-use-micmute-hotkey.patch: - Add ProBook to use micmute hotkey (LP: #1930910) https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=30b96fac92d911cb725f7220a9539085a24fe5f7 [ Jeremy Szu ] * d/p/lp1932352-hwdb-Add-mic-mute-key-mapping-for-HP-Elite-Dragonfly.patch: - Fix micmute hotkeys on HP Elite Dragonfly (LP: #1932352) https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=ac93cfcca200644b743deab94f655ccd74ff90a6 [ Dan Streetman ] * d/p/debian/UBUNTU-resolved-Mitigate-DVE-2018-0001-by-retrying-NXDOMAIN-with.patch: Remove no-longer-needed patch for DVE-2018-0001 (LP: #1785383) https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=943b2dd5884e67c67d6336c24352b02e17809df0 * d/p/lp1931578/0001-network-default-RequiredForOnline-false-if-Activacti.patch, d/p/lp1931578/0002-networkctl-add-field-Required-For-Online.patch, d/p/lp1931578/0003-test-add-test-to-verify-RequiredForOnline-setting-wi.patch: Adjust default for RequiredForOnline when using ActivationPolicy (LP: #1931578) https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=d0b8629ec14396f1a5d5f7c132c9b687065136b0 * d/p/lp1894622-Add-systemd-resolve-backwards-compatibility-section-.patch: Add man page symlink and deprecation notice for systemd-resolve (LP: #1894622) https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=f719185253f989d6708c894150c0878cabee6589 * d/p/lp1858210/0001-time-simplify-get_timezones.patch, d/p/lp1858210/0002-time-split-get_timezone-into-main-function-and-zone1.patch, d/p/lp1858210/0003-time-get-timezones-from-tzdata.zi.patch: Parse tzdata.zi so timedatectl list-timezones also lists aliases (LP: #1858210) https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=8e5b0a7c7c4e1e29b5e81511a1145633d9b75be5 -- Dan Streetman <ddstr...@canonical.com> Tue, 06 Jul 2021 13:37:59 -0400 ** Changed in: systemd (Ubuntu Impish) Status: Fix Committed => Fix Released -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1785383 Title: missing EDNS0 record confuses systemd-resolved Status in systemd: Fix Released Status in dnsmasq package in Ubuntu: Fix Released Status in systemd package in Ubuntu: Fix Released Status in dnsmasq source package in Bionic: Triaged Status in systemd source package in Bionic: Fix Released Status in dnsmasq source package in Focal: Fix Released Status in systemd source package in Focal: Fix Released Status in dnsmasq source package in Groovy: Fix Released Status in systemd source package in Groovy: Fix Released Status in dnsmasq source package in Hirsute: Fix Released Status in systemd source package in Hirsute: Fix Released Status in dnsmasq source package in Impish: Fix Released Status in systemd source package in Impish: Fix Released Bug description: [Impact] dnsmasq 2.79 and below omits EDNS0 OPT records when returning an empty answer for a domain it is authoritative for. systemd-resolved seems to get confused by this in certain circumstances; when using the stub resolver and requesting an address for which there are no AAAA records, there can sometimes be a five second hang in resolution. [Fix] This is fixed by upstream commit http://thekelleys.org.uk/gitweb/?p=dnsmasq.git;a=commit;h=1682d15a744880b0398af75eadf68fe66128af78 Not sure if it is worth cherry picking? I imagine the most likely trigger will be dnsmasq on routers which are not likely to be running Ubuntu, but maybe just in case. I also think there are some logic issues in systemd-resolved, upstream bug filed: https://github.com/systemd/systemd/issues/9785 [Test Case] Simple-ish test case for bionic: --- IFACE=dummy0 SUBNET=10.0.0 ip link add $IFACE type dummy ifconfig $IFACE ${SUBNET}.1/24 dnsmasq -h -R -d -C /dev/null -2 $IFACE -z -i $IFACE -I lo --host-record=test.test,${SUBNET}.1 --server=/test/ & dig -t a test.test @10.0.0.1 | grep EDNS # should return "; EDNS ..." dig -t aaaa test.test @10.0.0.1 | grep EDNS # again, should return "; EDNS ..." but doesn't --- To reproduce the systemd-resolved side of the problem --- # as above, but # now configure systemd-resolved to look at only 10.0.0.1, then systemd-resolve --reset-server-features # should exhibit five second delay then connect, assuming sshd is running :) ssh test.test --- More detailed test case for focal and later: install dnsmasq on a bionic system and start it, listening to an interface that is externally reachable, e.g. for a normal libvirt vm with interface name 'ens3': IFACE=ens3 dnsmasq -h -R -d -C /dev/null -2 $IFACE -z -i $IFACE -I lo --host-record=test.test,1.2.3.4 --server=/test/ note that the '1.2.3.4' address doesn't matter, any addr is ok. then setup a test system that can reach the dnsmasq system, and configure networkd to use the dnsmasq server, e.g. using config like: [Match] Name=ens3 [Network] DHCP=yes DNS=DNSMASQ_IP_ADDRESS Domains=test [DHCPv4] UseDNS=no UseDomains=no replace 'DNSMASQ_IP_ADDRESS' with the addr of the bionic system where dnsmasq is running, and replace 'ens3' with whatever the test system interface name is. Then restart systemd-networkd, and test: systemd-resolve --reset-server-features systemd-resolve --flush-caches host test.test The lookup using 'host' should complete immediately;. [Discussion] ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: dnsmasq-base 2.79-1 ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18 Uname: Linux 4.15.0-23-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.2 Architecture: amd64 Date: Sat Aug 4 11:33:56 2018 InstallationDate: Installed on 2018-05-31 (64 days ago) InstallationMedia: Xubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash SourcePackage: dnsmasq UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/systemd/+bug/1785383/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp