** Tags removed: verification-needed verification-needed-noble verification-needed-oracular verification-needed-plucky ** Tags added: verification-done verification-done-noble verification-done-oracular verification-done-plucky
-- You received this bug notification because you are a member of Debcrafters packages, which is subscribed to dbus-broker in Ubuntu. https://bugs.launchpad.net/bugs/2110040 Title: dbus-broker: fix compatibility with newer kernel's error code for SO_PEERPIDFD error case Status in dbus-broker package in Ubuntu: Fix Released Status in dbus-broker source package in Noble: Fix Committed Status in dbus-broker source package in Oracular: Fix Committed Status in dbus-broker source package in Plucky: Fix Committed Status in dbus-broker source package in Questing: Fix Released Bug description: [Original Description/Impact] dbus-broker in noble, oracular and plucky only checks for EINVAL when calling the SO_PEERPIDFD getsockopt to check if a process already exited. The kernel in 6.16 is changing the return value from EINVAL to ESRCH so that the particular case can be distinguished from generic errors: https://lore.kernel.org/all/20250411-work-pidfs- [email protected]/ The upstream main branch of dbus-broker has a fix for this: https://github.com/bus1/dbus- broker/commit/4b1d9da51dc2703b7596243cb555a689bb27b4c1 Without this fix, running a new kernel with the old dbus-broker won't be able to detect this failure mode anymore, and dbus-broker will stop working in case that happens, as it has been reported at: https://lore.kernel.org/all/20250415223454.GA1852104@ax162/ Backporting this back to noble/oracular/plucky will ensure that users running with a new kernel (e.g.: HWE, local backport) won't face this issue. [Test Plan] Build and install the patched dbus-broker in a container and check that it doesn't break: Noble: root@localhost:/tmp# apt install ./dbus-broker_35-2ubuntu0.1_amd64.deb Reading package lists... Done Building dependency tree... Done Reading state information... Done Note, selecting 'dbus-broker' instead of './dbus-broker_35-2ubuntu0.1_amd64.deb' The following NEW packages will be installed: dbus-broker 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/169 kB of archives. After this operation, 430 kB of additional disk space will be used. Get:1 /tmp/dbus-broker_35-2ubuntu0.1_amd64.deb dbus-broker amd64 35-2ubuntu0.1 [169 kB] Selecting previously unselected package dbus-broker. (Reading database ... 27500 files and directories currently installed.) Preparing to unpack .../dbus-broker_35-2ubuntu0.1_amd64.deb ... Unpacking dbus-broker (35-2ubuntu0.1) ... Setting up dbus-broker (35-2ubuntu0.1) ... Replacing the running dbus-daemon with dbus-broker requires a reboot: please reboot the system when convenient. Created symlink /etc/systemd/user/dbus.service → /usr/lib/systemd/user/dbus-broker.service. Created symlink /etc/systemd/system/dbus.service → /usr/lib/systemd/system/dbus-broker.service. Processing triggers for man-db (2.12.0-4build2) ... Processing triggers for systemd (255.4-1ubuntu8) ... root@localhost:/tmp# systemctl daemon-reload root@localhost:/tmp# systemctl restart dbus-broker root@localhost:/tmp# systemctl status dbus-broker ● dbus-broker.service - D-Bus System Message Bus Loaded: loaded (/usr/lib/systemd/system/dbus-broker.service; enabled; preset: enabled) Active: active (running) since Tue 2025-05-06 15:00:08 BST; 3s ago TriggeredBy: ● dbus.socket Docs: man:dbus-broker-launch(1) Main PID: 2458 (dbus-broker-lau) Tasks: 2 (limit: 66786) Memory: 1.3M (peak: 2.1M) CPU: 10ms CGroup: /system.slice/dbus-broker.service ├─2458 /usr/bin/dbus-broker-launch --scope system --audit └─2459 dbus-broker --log 4 --controller 9 --machine-id b70250626e354e8481fe3ed01e2a769f --max-bytes 5368> May 06 15:00:08 localhost systemd[1]: Starting dbus-broker.service - D-Bus System Message Bus... May 06 15:00:08 localhost dbus-broker-launch[2458]: Kernel is missing AppArmor DBus support. May 06 15:00:08 localhost systemd[1]: Started dbus-broker.service - D-Bus System Message Bus. May 06 15:00:08 localhost dbus-broker-launch[2458]: Ready root@localhost:/tmp# cat /etc/os-release PRETTY_NAME="Ubuntu 24.04 LTS" NAME="Ubuntu" VERSION_ID="24.04" VERSION="24.04 LTS (Noble Numbat)" VERSION_CODENAME=noble ID=ubuntu ID_LIKE=debian HOME_URL="https://www.ubuntu.com/"; SUPPORT_URL="https://help.ubuntu.com/"; BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"; PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"; UBUNTU_CODENAME=noble LOGO=ubuntu-logo Plucky: root@localhost:/tmp# apt install ./dbus-broker_36-1ubuntu0.1_amd64.deb Note, selecting 'dbus-broker' instead of './dbus-broker_36-1ubuntu0.1_amd64.deb' The following packages were automatically installed and are no longer required: icu-devtools libpython3.12t64 libxenmisc4.19 linux-tools-6.12.0-15 libicu-dev libunwind8 linux-tools-6.11.0-8 linux-tools-6.12.0-15-generic libicu76 libxenmisc4.17t64 linux-tools-6.11.0-8-generic Use 'apt autoremove' to remove them. Installing: dbus-broker Summary: Upgrading: 0, Installing: 1, Removing: 0, Not Upgrading: 0 Download size: 0 B / 186 kB Space needed: 475 kB / 14.5 GB available Get:1 /tmp/dbus-broker_36-1ubuntu0.1_amd64.deb dbus-broker amd64 36-1ubuntu0.1 [186 kB] Selecting previously unselected package dbus-broker. (Reading database ... 35589 files and directories currently installed.) Preparing to unpack .../dbus-broker_36-1ubuntu0.1_amd64.deb ... Unpacking dbus-broker (36-1ubuntu0.1) ... Setting up dbus-broker (36-1ubuntu0.1) ... Replacing the running dbus-daemon with dbus-broker requires a reboot: please reboot the system when convenient. Created symlink '/etc/systemd/user/dbus.service' → '/usr/lib/systemd/user/dbus-broker.service'. Created symlink '/etc/systemd/system/dbus.service' → '/usr/lib/systemd/system/dbus-broker.service'. Processing triggers for man-db (2.13.0-1) ... Processing triggers for systemd (257.4-1ubuntu3) ... root@localhost:/tmp# systemctl daemon-reload root@localhost:/tmp# systemctl restart dbus-broker root@localhost:/tmp# systemctl status dbus-broker ● dbus-broker.service - D-Bus System Message Bus Loaded: loaded (/usr/lib/systemd/system/dbus-broker.service; enabled; preset: enabled) Active: active (running) since Tue 2025-05-06 15:02:31 BST; 2s ago Invocation: f56d62e8fbef494bb7648f951f327d53 TriggeredBy: ● dbus.socket Docs: man:dbus-broker-launch(1) Main PID: 2449 (dbus-broker-lau) Tasks: 2 (limit: 66786) Memory: 1.3M (peak: 1.9M) CPU: 14ms CGroup: /system.slice/dbus-broker.service ├─2449 /usr/bin/dbus-broker-launch --scope system --audit └─2450 dbus-broker --log 4 --controller 9 --machine-id c88acd22b631411c9e1d2467add01ca4 --max-bytes 5368> May 06 15:02:31 localhost systemd[1]: Starting dbus-broker.service - D-Bus System Message Bus... May 06 15:02:31 localhost dbus-broker-launch[2449]: Kernel is missing AppArmor DBus support. May 06 15:02:31 localhost systemd[1]: Started dbus-broker.service - D-Bus System Message Bus. May 06 15:02:31 localhost dbus-broker-launch[2449]: Ready root@localhost:/tmp# cat /etc/os-release PRETTY_NAME="Ubuntu 25.04" NAME="Ubuntu" VERSION_ID="25.04" VERSION="25.04 (Plucky Puffin)" VERSION_CODENAME=plucky ID=ubuntu ID_LIKE=debian HOME_URL="https://www.ubuntu.com/"; SUPPORT_URL="https://help.ubuntu.com/"; BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"; PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"; UBUNTU_CODENAME=plucky LOGO=ubuntu-logo Oracular: root@localhost:/tmp# apt install ./dbus-broker_36-1ubuntu0.1_amd64.deb Note, selecting 'dbus-broker' instead of './dbus-broker_36-1ubuntu0.1_amd64.deb' Installing: dbus-broker Summary: Upgrading: 0, Installing: 1, Removing: 0, Not Upgrading: 0 Download size: 0 B / 164 kB Space needed: 422 kB / 14.5 GB available Get:1 /tmp/dbus-broker_36-1ubuntu0.1_amd64.deb dbus-broker amd64 36-1ubuntu0.1 [164 kB] Selecting previously unselected package dbus-broker. (Reading database ... 26354 files and directories currently installed.) Preparing to unpack .../dbus-broker_36-1ubuntu0.1_amd64.deb ... Unpacking dbus-broker (36-1ubuntu0.1) ... Setting up dbus-broker (36-1ubuntu0.1) ... Replacing the running dbus-daemon with dbus-broker requires a reboot: please reboot the system when convenient. Created symlink '/etc/systemd/user/dbus.service' → '/usr/lib/systemd/user/dbus-broker.service'. Created symlink '/etc/systemd/system/dbus.service' → '/usr/lib/systemd/system/dbus-broker.service'. Processing triggers for man-db (2.12.1-3) ... Processing triggers for systemd (256.5-2ubuntu3) ... root@localhost:/tmp# systemctl daemon-reload root@localhost:/tmp# systemctl restart dbus-broker root@localhost:/tmp# systemctl status dbus-broker ● dbus-broker.service - D-Bus System Message Bus Loaded: loaded (/usr/lib/systemd/system/dbus-broker.service; enabled; preset: enabled) Active: active (running) since Tue 2025-05-06 15:05:32 BST; 2s ago Invocation: 438703731d2a488bb4db9031f50906fd TriggeredBy: ● dbus.socket Docs: man:dbus-broker-launch(1) Main PID: 3099 (dbus-broker-lau) Tasks: 2 (limit: 66786) Memory: 1.2M (peak: 1.9M) CPU: 15ms CGroup: /system.slice/dbus-broker.service ├─3099 /usr/bin/dbus-broker-launch --scope system --audit └─3100 dbus-broker --log 4 --controller 9 --machine-id 6d2f232cba464e4d9af4ba93985aa438 --max-bytes 5368> May 06 15:05:32 localhost systemd[1]: Starting dbus-broker.service - D-Bus System Message Bus... May 06 15:05:32 localhost dbus-broker-launch[3099]: Kernel is missing AppArmor DBus support. May 06 15:05:32 localhost systemd[1]: Started dbus-broker.service - D-Bus System Message Bus. May 06 15:05:32 localhost dbus-broker-launch[3099]: Ready root@localhost:/tmp# cat /etc/os-release PRETTY_NAME="Ubuntu 24.10" NAME="Ubuntu" VERSION_ID="24.10" VERSION="24.10 (Oracular Oriole)" VERSION_CODENAME=oracular ID=ubuntu ID_LIKE=debian HOME_URL="https://www.ubuntu.com/"; SUPPORT_URL="https://help.ubuntu.com/"; BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"; PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"; UBUNTU_CODENAME=oracular LOGO=ubuntu-logo [Where problems could occur] The updated logic adds a new expected error code from the SO_PEERPIDFD getsockopt invocation. An issue here would affect the ability of dbus- broker to get pidfds from clients, which would cause systemd and other clients to fall back to pid-based tracking of requests. 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