This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1813244 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1813244 Title: systemd logrotate cause kernel trace "BUG: unable to handle kernel paging request at 6db23a14" on Cosmic i386 Status in linux package in Ubuntu: Incomplete Bug description: This issue was found after leaving a SUT to run overnight (was testing the ubuntu_cts_kernel test 13 hours ago before this happens). Can't tell if this is a regression, as I haven't find a way to reproduce it. But I do see similar reports on the Internet [1] After checking the systemd service timers, it looks like this is caused by the logrotate.service: $ sudo systemctl list-timers --all NEXT LEFT LAST PASSED UNIT ACTIVATES Fri 2019-01-25 06:18:58 UTC 1h 40min left Thu 2019-01-24 06:34:15 UTC 22h ago apt-daily-upgrade.timer apt-daily-upgrade.service Fri 2019-01-25 09:15:54 UTC 4h 37min left Fri 2019-01-25 03:43:24 UTC 55min ago apt-daily.timer apt-daily.service Fri 2019-01-25 17:02:47 UTC 12h left Fri 2019-01-25 04:20:17 UTC 18min ago motd-news.timer motd-news.service Sat 2019-01-26 00:00:00 UTC 19h left Fri 2019-01-25 00:00:37 UTC 4h 38min ago logrotate.timer logrotate.service Sat 2019-01-26 04:02:38 UTC 23h left Fri 2019-01-25 04:02:38 UTC 36min ago systemd-tmpfiles-clean.timer systemd-tmpfiles-clean.serv Mon 2019-01-28 00:00:00 UTC 2 days left Wed 2019-01-23 10:44:18 UTC 1 day 17h ago fstrim.timer fstrim.service n/a n/a n/a n/a snapd.snap-repair.timer snapd.snap-repair.service 7 timers listed. After this happens, you won't be able to reboot it with the command. $ sudo reboot sudo: unable to resolve host onza: Resource temporarily unavailable Killed Here is the error message, please refer to the attachment for a complete syslog: Jan 25 00:00:37 onza systemd[1]: Starting Rotate log files... Jan 25 00:00:37 onza kernel: [45282.956634] BUG: unable to handle kernel paging request at 6db23a14 Jan 25 00:00:37 onza kernel: [45282.962902] *pdpt = 0000000033fa1001 *pde = 0000000000000000 Jan 25 00:00:37 onza kernel: [45282.968650] Oops: 0000 [#1] SMP Jan 25 00:00:37 onza kernel: [45282.971796] CPU: 0 PID: 407 Comm: systemd-journal Not tainted 4.18.0-14-generic #15-Ubuntu Jan 25 00:00:37 onza kernel: [45282.980330] Hardware name: Dell Inc. PowerEdge R310/05XKKK, BIOS 1.11.0 09/18/2012 Jan 25 00:00:37 onza kernel: [45282.988127] EIP: __kmalloc+0xc9/0x240 Jan 25 00:00:37 onza kernel: [45282.991785] Code: 4d e0 8d 4a 01 31 c6 8b 45 f0 89 75 dc 31 f3 8b 37 64 0f c7 0e 0f 94 c0 84 c0 74 b9 8b 75 e4 8b 45 dc 39 45 e0 74 0e 03 5f 14 <33> 1b 33 9f b4 00 00 00 0f 18 03 f7 45 ec 00 80 00 00 0f 85 3f 01 Jan 25 00:00:37 onza kernel: [45283.011254] EAX: 9e20b374 EBX: 6db23a14 ECX: 0000350d EDX: 0000350c Jan 25 00:00:37 onza kernel: [45283.017769] ESI: eac03a00 EDI: eac03a00 EBP: f461fd9c ESP: f461fd74 Jan 25 00:00:37 onza kernel: [45283.024304] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010206 Jan 25 00:00:37 onza kernel: [45283.031245] CR0: 80050033 CR2: 6db23a14 CR3: 29d304a0 CR4: 000006f0 Jan 25 00:00:37 onza kernel: [45283.037770] Call Trace: Jan 25 00:00:37 onza kernel: [45283.040395] ? ext4_htree_store_dirent+0x2e/0x120 Jan 25 00:00:37 onza kernel: [45283.045255] ext4_htree_store_dirent+0x2e/0x120 Jan 25 00:00:37 onza kernel: [45283.049951] htree_dirblock_to_tree+0xd2/0x230 Jan 25 00:00:37 onza kernel: [45283.054562] ext4_htree_fill_tree+0x7f/0x2c0 Jan 25 00:00:37 onza kernel: [45283.058991] ? kmem_cache_alloc_trace+0x167/0x1e0 Jan 25 00:00:37 onza kernel: [45283.063849] ? ext4_readdir+0x9d4/0xb10 Jan 25 00:00:37 onza kernel: [45283.067854] ext4_readdir+0x6aa/0xb10 Jan 25 00:00:37 onza kernel: [45283.071687] ? _copy_to_user+0x21/0x30 Jan 25 00:00:37 onza kernel: [45283.075597] ? do_statfs64+0x34/0x60 Jan 25 00:00:37 onza kernel: [45283.079334] ? security_file_permission+0x7c/0xb0 Jan 25 00:00:37 onza kernel: [45283.084306] iterate_dir+0x15c/0x1a0 Jan 25 00:00:37 onza kernel: [45283.087883] ksys_getdents64+0x6f/0x110 Jan 25 00:00:37 onza kernel: [45283.091853] ? iterate_dir+0x1a0/0x1a0 Jan 25 00:00:37 onza kernel: [45283.095771] sys_getdents64+0x16/0x20 Jan 25 00:00:37 onza kernel: [45283.099595] do_fast_syscall_32+0x7f/0x1e0 Jan 25 00:00:37 onza kernel: [45283.103858] entry_SYSENTER_32+0x4e/0x7c Jan 25 00:00:37 onza kernel: [45283.107938] EIP: 0xb7ef4d41 Jan 25 00:00:37 onza kernel: [45283.110898] Code: f6 ff ff 55 89 e5 8b 55 08 8b 80 5c cd ff ff 85 d2 74 02 89 02 5d c3 8b 04 24 c3 8b 1c 24 c3 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76 Jan 25 00:00:37 onza kernel: [45283.130298] EAX: ffffffda EBX: 00000021 ECX: 02219dec EDX: 00008000 Jan 25 00:00:37 onza kernel: [45283.136824] ESI: ffffffb4 EDI: 00000000 EBP: 02219dd0 ESP: bff8f5e8 Jan 25 00:00:37 onza kernel: [45283.143245] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000296 Jan 25 00:00:37 onza kernel: [45283.150299] Modules linked in: iptable_nat ip_gre gre ip_tunnel dummy iptable_filter xt_recent bpfilter openvswitch nsh nf_conntrack_ipv6 nf_nat_ipv6 nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_defrag_ipv6 nf_conncount nf_nat nf_conntrack intel_powerclamp coretemp ipmi_ssif kvm_intel kvm dcdbas ipmi_si joydev irqbypass intel_cstate input_leds ipmi_devintf i7core_edac ipmi_msghandler acpi_power_meter mac_hid sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear mgag200 i2c_algo_bit ttm hid_generic drm_kms_helper gpio_ich syscopyarea sysfillrect sysimgblt mpt3sas fb_sys_fops drm Jan 25 00:00:37 onza kernel: [45283.222723] usbhid raid_class pata_acpi lpc_ich hid scsi_transport_sas bnx2 wmi Jan 25 00:00:37 onza kernel: [45283.230378] CR2: 000000006db23a14 Jan 25 00:00:37 onza kernel: [45283.233894] ---[ end trace a12425d45f6ac772 ]--- [1] https://forum.manjaro.org/t/systemd-timer-crashing-my-system-at-midnight/19609 [2] ProblemType: Bug DistroRelease: Ubuntu 18.10 Package: linux-image-4.18.0-14-generic 4.18.0-14.15 ProcVersionSignature: User Name 4.18.0-14.15-generic 4.18.20 Uname: Linux 4.18.0-14-generic i686 AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Jan 25 03:48 seq crw-rw---- 1 root audio 116, 33 Jan 25 03:48 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.10-0ubuntu13.1 Architecture: i386 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CurrentDmesg: Date: Fri Jan 25 04:18:08 2019 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' MachineType: Dell Inc. PowerEdge R310 PciMultimedia: ProcFB: 0 mgadrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-14-generic root=UUID=6aaa11f6-d386-4c0c-b4b8-38e6c408980a ro console=ttyS0,115200n8 RelatedPackageVersions: linux-restricted-modules-4.18.0-14-generic N/A linux-backports-modules-4.18.0-14-generic N/A linux-firmware 1.175.1 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/18/2012 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.11.0 dmi.board.name: 05XKKK dmi.board.vendor: Dell Inc. dmi.board.version: A05 dmi.chassis.type: 23 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.11.0:bd09/18/2012:svnDellInc.:pnPowerEdgeR310:pvr:rvnDellInc.:rn05XKKK:rvrA05:cvnDellInc.:ct23:cvr: dmi.product.name: PowerEdge R310 dmi.sys.vendor: Dell Inc. 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