Status changed to 'Confirmed' because the bug affects multiple users. ** Changed in: systemd (Ubuntu) Status: New => Confirmed
-- 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/2024009 Title: [PATCH] systemd-resolved can't follow more than 8 CNAMEs Status in systemd package in Ubuntu: Confirmed Bug description: On Ubuntu 20.04 (systemd v245.4-4ubuntu3.21), hostname resolution only follows 8 CNAME redirections maximum. So when using a service like Azure Virtual Desktop that has between 9 and 12 redirections, name resolution fails. $ host client.wvd.microsoft.com Host client.wvd.microsoft.com not found: 2(SERVFAIL) $ resolvectl query client.wvd.microsoft.com client.wvd.microsoft.com: resolve call failed: CNAME loop detected, or CNAME resolving disabled on 'waws-prod-zrh-ff7172dd.sip.p.azurewebsites.windows.net' On the other hand it's working fine on Ubuntu 20.04 because CNAME loop limit has been raised from 8 to 16. $ host client.wvd.microsoft.com client.wvd.microsoft.com is an alias for client.privatelink-global.wvd.microsoft.com. client.privatelink-global.wvd.microsoft.com is an alias for client.privatelink.wvd.microsoft.com. client.privatelink.wvd.microsoft.com is an alias for rdweb.wvd.microsoft.com. rdweb.wvd.microsoft.com is an alias for rdweb.privatelink-global.wvd.microsoft.com. rdweb.privatelink-global.wvd.microsoft.com is an alias for rdweb.privatelink.wvd.microsoft.com. rdweb.privatelink.wvd.microsoft.com is an alias for rdweb-prod-geo.trafficmanager.net. rdweb-prod-geo.trafficmanager.net is an alias for mrs-chnor1c101-rdweb-prod.wvd-ase-chnor1c101-prod.p.azurewebsites.net. mrs-chnor1c101-rdweb-prod.wvd-ase-chnor1c101-prod.p.azurewebsites.net is an alias for waws-prod-zrh-63daa049.sip.p.azurewebsites.windows.net. waws-prod-zrh-63daa049.sip.p.azurewebsites.windows.net is an alias for waws-prod-zrh-63daa049.cloudapp.net. waws-prod-zrh-63daa049.cloudapp.net has address 51.107.69.35 Here's a quick fix that raises the max CNAME limit from 8 to 16 like it is in Ubuntu 22.04, it fixes the problem for me. Best regards, Vincent. --- systemd-245.4.ORIG/src/resolve/resolved-dns-query.c 2023-06-15 16:58:25.454156663 +0200 +++ systemd-245.4/src/resolve/resolved-dns-query.c 2023-06-01 14:30:09.000000000 +0200 @@ -10,7 +10,7 @@ #include "resolved-etc-hosts.h" #include "string-util.h" -#define CNAME_MAX 8 +#define CNAME_MAX 16 #define QUERIES_MAX 2048 #define AUXILIARY_QUERIES_MAX 64 ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: systemd 249.11-0ubuntu3.9 [modified: usr/lib/sysctl.d/50-default.conf] ProcVersionSignature: Ubuntu 5.19.0-42.43~22.04.1-generic 5.19.17 Uname: Linux 5.19.0-42-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu82.5 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Thu Jun 15 16:53:19 2023 InstallationDate: Installed on 2022-11-22 (205 days ago) InstallationMedia: Error: [Errno 13] Permission denied: '/var/log/installer/media-info' MachineType: Dell Inc. Latitude 5591 ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.19.0-42-generic root=/dev/mapper/AmadeUbuntu22-root ro apparmor=1 security=apparmor audit=1 acpi_rev_override load_nvme=YES nouveau.modeset=0 dis_ucode_ldr quiet splash RebootRequiredPkgs: Error: path contained symlinks. SourcePackage: systemd UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/21/2022 dmi.bios.release: 1.25 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.25.0 dmi.board.name: 0DVVG1 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.25.0:bd11/21/2022:br1.25:svnDellInc.:pnLatitude5591:pvr:rvnDellInc.:rn0DVVG1:rvrA00:cvnDellInc.:ct10:cvr:sku0819: dmi.product.family: Latitude dmi.product.name: Latitude 5591 dmi.product.sku: 0819 dmi.sys.vendor: Dell Inc. modified.conffile..etc.cron.daily.apport: [deleted] mtime.conffile..etc.systemd.journald.conf: 2022-11-22T13:40:37.558934 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/2024009/+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