Backports and Testing done, coordinated with mdeslaur to not conflict with Security updates staged in https://launchpad.net/~ubuntu-security- proposed/+archive/ubuntu/ppa/+packages.
Plan is to push the SRU asap (which also i favorable looking at all the crash reports) and the Security Team will continue on top of that (there were some extra CVEs that need to be included anyway). Adding patch and SRU template now... ** Tags removed: third-party-packages -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ntp in Ubuntu. https://bugs.launchpad.net/bugs/1567540 Title: ntpd crashed with SIGABRT (was: ntp crashes everytime the network goes up or down.) Status in NTP: Fix Released Status in ntp package in Ubuntu: Fix Released Status in ntp source package in Xenial: Fix Committed Bug description: [Impact] * In NTP 4.2.8p4 there are several races that can cause a crash on startup or on a bit later but still on startup by DNS querying a peer. * The crash obviously affects users, especially as it seems - due to its racy nature - not appear on most, but severely hamstring some other users. * The details are a bit blurred, but overall there were four fixes upstream that address just this "kind of issue" that seemed to surface post 4.2.8p4. [Test Case] * Start NTP (service) * Expectation: work * Failure: Crash * Constraints: this is a race, it seems to appear at <0.1% chance to all systems I have (or lower - as I just can say it didn't trigger in 1000 tests). But that matches other reports. OTOH for some systems it seems to trigger >50% which also matches the high amount of crash reports (close to 20k now) as referred in comment 43 [Regression Potential] * Eventually the change is rather invasive as it changes the locking scheme of parts of the code - so there surely is some regression potential. * Fortunately not all, but most of this change is upstream and tested quite heavily a few months already. * I tested as good as I could and could neither in code nor in test find an obvious weakness, and looking at all the crash reports it is about time. [Other Info] * While all study of bugs, upstream changes and tests suggest we haven't broken anything, still I have to admit that "on my own" I can't confirm that it fixed the bug. So we are really dependent on the reporters here that seem to have the kind of hardware where it "crashes reliably". -------- ntp crashes every time the network goes up or down while the system is running and also crashes after booting up without network. --- ApportVersion: 2.20.1-0ubuntu1 Architecture: amd64 CurrentDesktop: XFCE DistroRelease: Ubuntu 16.04 InstallationDate: Installed on 2016-03-12 (26 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160224) NtpStatus: ntpq: read: Connection refused Package: ntp 1:4.2.8p4+dfsg-3ubuntu4 PackageArchitecture: amd64 ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-17-generic root=UUID=306314bc-efcb-4c2d-b0e9-e05ec92ed0f0 ro ProcVersionSignature: Ubuntu 4.4.0-17.33-generic 4.4.6 Tags: xenial Uname: Linux 4.4.0-17-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True --- ApportVersion: 2.20.1-0ubuntu1 Architecture: amd64 CurrentDesktop: XFCE DistroRelease: Ubuntu 16.04 InstallationDate: Installed on 2016-03-12 (31 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160224) NtpStatus: ntpq: read: Connection refused Package: ntp 1:4.2.8p4+dfsg-3ubuntu5 PackageArchitecture: amd64 ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-18-generic root=UUID=306314bc-efcb-4c2d-b0e9-e05ec92ed0f0 ro ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6 Tags: xenial Uname: Linux 4.4.0-18-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True --- ApportVersion: 2.20.1-0ubuntu1 Architecture: amd64 CurrentDesktop: XFCE DistroRelease: Ubuntu 16.04 InstallationDate: Installed on 2016-04-13 (0 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160412) NtpStatus: ntpq: read: Connection refused Package: ntp 1:4.2.8p4+dfsg-3ubuntu5 PackageArchitecture: amd64 ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-18-generic root=UUID=13f57794-2e19-4a56-836a-94185bba5ec5 ro quiet splash ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6 Tags: xenial Uname: Linux 4.4.0-18-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True --- ApportVersion: 2.20.1-0ubuntu1 Architecture: amd64 CurrentDesktop: XFCE DistroRelease: Ubuntu 16.04 InstallationDate: Installed on 2016-04-13 (0 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160412) NtpStatus: ntpq: read: Connection refused Package: ntp 1:4.2.8p4+dfsg-3ubuntu5 PackageArchitecture: amd64 ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-18-generic root=UUID=13f57794-2e19-4a56-836a-94185bba5ec5 ro quiet splash ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6 Tags: xenial Uname: Linux 4.4.0-18-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True --- ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 CurrentDesktop: XFCE DistroRelease: Ubuntu 16.04 InstallationDate: Installed on 2016-04-14 (3 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160412) NtpStatus: ntpq: read: Connection refused Package: ntp 1:4.2.8p4+dfsg-3ubuntu5 PackageArchitecture: amd64 ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-20-generic root=UUID=b9c0528f-e81f-4b08-9b31-032f14f72ccd ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.4.0-20.36-generic 4.4.6 Tags: xenial Uname: Linux 4.4.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True --- ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 CurrentDesktop: XFCE DistroRelease: Ubuntu 16.04 InstallationDate: Installed on 2016-04-14 (3 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160412) NtpStatus: ntpq: read: Connection refused Package: ntp 1:4.2.8p4+dfsg-3ubuntu5 PackageArchitecture: amd64 ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-20-generic root=UUID=b9c0528f-e81f-4b08-9b31-032f14f72ccd ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.4.0-20.36-generic 4.4.6 Tags: xenial Uname: Linux 4.4.0-20-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True --- ApportVersion: 2.20.1-0ubuntu2.1 Architecture: amd64 CurrentDesktop: XFCE DistroRelease: Ubuntu 16.04 InstallationDate: Installed on 2016-04-14 (63 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160412) NtpStatus: ntpq: read: Connection refused Package: ntp 1:4.2.8p4+dfsg-3ubuntu5 PackageArchitecture: amd64 ProcCmdline: BOOT_IMAGE=/boot/vmlinuz-4.4.0-25-generic root=UUID=3aea4570-4011-4247-9636-68317385324d ro ProcVersionSignature: Ubuntu 4.4.0-25.44-generic 4.4.13 Tags: xenial third-party-packages Uname: Linux 4.4.0-25-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dialout dip lpadmin mail netdev plugdev sambashare sudo _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ntp/+bug/1567540/+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
