I managed to catch this issue with IPMI console: [ 673.975988] BUG: Unable to handle kernel instruction fetch [ 673.976017] Faulting instruction address: 0x7fe000087fe00008 [ 673.976025] Oops: Kernel access of bad area, sig: 11 [#1] [ 673.976032] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA PowerNV [ 673.976040] Modules linked in: binfmt_misc dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua leds_powernv ipmi_powernv ipmi_devintf ipmi_msghandler ibmpowernv uio_pdrv_genirq vmx_crypto uio powernv_rng powernv_op_panel sch_fq_codel ip_tables x_tables autofs4 ses enclosure scsi_transport_sas btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear crct10dif_vpmsum crc32c_vpmsum tg3 ipr [last unloaded: notifier_error_inject] [ 673.976101] CPU: 0 PID: 76667 Comm: reuseport_bpf_c Not tainted 5.3.0-42-generic #34-Ubuntu [ 673.976109] NIP: 7fe000087fe00008 LR: c000000000ca9d10 CTR: 7fe000087fe00008 [ 673.976117] REGS: c000000ffffcf580 TRAP: 0480 Not tainted (5.3.0-42-generic) [ 673.976124] MSR: 9000000000009033 <SF,HV,EE,ME,IR,DR,RI,LE> CR: 24002488 XER: 20000000 [ 673.976135] CFAR: c000000000ca9d0c IRQMASK: 0 [ 673.976135] GPR00: c000000000e4094c c000000ffffcf810 c0000000019c9000 c000000a2208b6e0 [ 673.976135] GPR04: c008000007c70038 c000000a2208b6e0 0000000000000028 000000012e2e5506 [ 673.976135] GPR08: 00000000a2be9417 0000000000000000 0000000000000000 0000000000000000 [ 673.976135] GPR12: 7fe000087fe00008 c000000001d60000 0000000000000003 0000000000000101 [ 673.976135] GPR16: c000000003fe00e8 00000000000022b8 0000000000002788 c0000000018fb600 [ 673.976135] GPR20: 000000000000000a 0000000000000000 00000000000022b8 0000000000000001 [ 673.976135] GPR24: 0000000000000000 0000000000000028 00000000000000a0 c000000003fe00e8 [ 673.976135] GPR28: c008000007c70000 00000000147b1819 c000000a2208b6e0 c000001e2d8b0000 [ 673.976195] NIP [7fe000087fe00008] 0x7fe000087fe00008 [ 673.976206] LR [c000000000ca9d10] reuseport_select_sock+0x100/0x400 [ 673.976212] Call Trace: [ 673.976216] [c000000ffffcf810] [c000000fe9daf0f0] 0xc000000fe9daf0f0 (unreliable) [ 673.976226] [c000000ffffcf8b0] [c000000000e4094c] inet6_lhash2_lookup+0x1ec/0x220 [ 673.976234] [c000000ffffcf930] [c000000000e40c80] inet6_lookup_listener+0x300/0x3f0 [ 673.976244] [c000000ffffcf9d0] [c000000000e1ec38] tcp_v6_rcv+0x7d8/0xe10 [ 673.976252] [c000000ffffcfb00] [c000000000dd7e70] ip6_protocol_deliver_rcu+0x110/0x6e0 [ 673.976261] [c000000ffffcfb80] [c000000000dd846c] ip6_input_finish+0x2c/0x40 [ 673.976269] [c000000ffffcfba0] [c000000000dd8560] ip6_input+0xe0/0xf0 [ 673.976276] [c000000ffffcfc10] [c000000000dd7008] ip6_rcv_finish+0xa8/0xe0 [ 673.976283] [c000000ffffcfc40] [c000000000dd7b90] ipv6_rcv+0x100/0x110 [ 673.976291] [c000000ffffcfcc0] [c000000000c6d040] __netif_receive_skb_one_core+0x70/0xb0 [ 673.976299] [c000000ffffcfd00] [c000000000c6ee70] process_backlog+0xd0/0x230 [ 673.976307] [c000000ffffcfd70] [c000000000c6db88] net_rx_action+0x1e8/0x510 [ 673.976315] [c000000ffffcfe90] [c000000000e9c8a0] __do_softirq+0x160/0x3f4 [ 673.976324] [c000000ffffcff90] [c000000000030be8] call_do_softirq+0x14/0x24 [ 673.976332] [c000000004a4f6b0] [c00000000001c2e8] do_softirq_own_stack+0x38/0x50 [ 673.976341] [c000000004a4f6d0] [c0000000001315a0] do_softirq.part.0+0x80/0xb0 [ 673.976349] [c000000004a4f700] [c000000000131698] __local_bh_enable_ip+0xc8/0xf0 [ 673.976357] [c000000004a4f720] [c000000000dd19b8] ip6_finish_output2+0x298/0x790 [ 673.976365] [c000000004a4f7c0] [c000000000dd6124] ip6_output+0x84/0x1c0 [ 673.976372] [c000000004a4f840] [c000000000dd222c] ip6_xmit+0x37c/0x7b0 [ 673.976379] [c000000004a4f960] [c000000000e272e4] inet6_csk_xmit+0xb4/0x120 [ 673.976387] [c000000004a4fa00] [c000000000d4231c] __tcp_transmit_skb+0x55c/0xd80 [ 673.976396] [c000000004a4fab0] [c000000000d43a18] tcp_connect+0x918/0xab0 [ 673.976403] [c000000004a4fb70] [c000000000e1c25c] tcp_v6_connect+0x5ac/0x740 [ 673.976411] [c000000004a4fc50] [c000000000d7271c] __inet_stream_connect+0x12c/0x4b0 [ 673.976419] [c000000004a4fcf0] [c000000000d72afc] inet_stream_connect+0x5c/0x90 [ 673.976428] [c000000004a4fd30] [c000000000c37a0c] __sys_connect+0x11c/0x160 [ 673.976435] [c000000004a4fe00] [c000000000c37a78] sys_connect+0x28/0x40 [ 673.976443] [c000000004a4fe20] [c00000000000b388] system_call+0x5c/0x70 [ 673.976449] Instruction dump: [ 673.976454] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX [ 673.976462] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX [ 673.976472] ---[ end trace 0961698a90363364 ]--- [ 673.976948] [ 674.977035] Kernel panic - not syncing: Aiee, killing interrupt handler! [ 674.978187] Rebooting in 10 seconds..
-- 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/1867155 Title: P8 node modoc will reboot automatically when running the sru_misc test suite Status in ubuntu-kernel-tests: Triaged Status in linux package in Ubuntu: Confirmed Bug description: Tested with 5 attempts, 4 hangs around the following test in ubuntu_kernel_selftests net sub-category: # selftests: net: reuseport_bpf_cpu First attempt: 23:21:32 DEBUG| [stdout] ok 2 selftests: net: reuseport_bpf_cpu 23:21:32 DEBUG| [stdout] # selftests: net: reuseport_bpf_numa 23:21:32 DEBUG| [stdout] # ---- IPv4 UDP ---- (hang here) Second attempt: 10:17:35 DEBUG| [stdout] ok 1 selftests: net: reuseport_bpf 10:17:35 DEBUG| [stdout] # selftests: net: reuseport_bpf_cpu 10:17:35 DEBUG| [stdout] # ---- IPv4 UDP ---- 10:17:35 DEBUG| [stdout] # send cpu 0, receive socket 0 (line skipped) 10:17:35 DEBUG| [stdout] # send cpu 159, receive socket 159 10:17:35 DEBUG| [stdout] # ---- IPv6 TCP ---- (hang here) Third attempt failed because of test timeout: 12:46:16 DEBUG| [stdout] # [FAIL] 12:46:16 DEBUG| [stdout] # -------------------- 12:46:16 DEBUG| [stdout] # running psock_tpacket test 12:46:16 DEBUG| [stdout] # -------------------- 13:14:13 INFO | Timer expired (1800 sec.), nuking pid 161853 Fourth attempt: 07:41:51 DEBUG| [stdout] # selftests: net: reuseport_bpf_cpu 07:41:51 DEBUG| [stdout] # ---- IPv4 UDP ---- 07:41:51 DEBUG| [stdout] # send cpu 0, receive socket 0 (lines skipped) 07:41:51 DEBUG| [stdout] # send cpu 159, receive socket 159 07:41:51 DEBUG| [stdout] # ---- IPv6 UDP ---- 07:41:51 DEBUG| [stdout] # send cpu 0, receive socket 0 07:41:51 DEBUG| [stdout] # send cpu 1, receive socket 1 (lines skipped) 07:41:51 DEBUG| [stdout] # send cpu 157, receive socket 157 07:41:51 DEBUG| [stdout] # send cpu 159, receive socket 159 07:41:51 DEBUG| [stdout] # ---- IPv4 TCP ---- (test hang here) Fifth attempt: 04:29:17 DEBUG| [stdout] ok 1 selftests: net: reuseport_bpf 04:29:17 DEBUG| [stdout] # selftests: net: reuseport_bpf_cpu 04:29:17 DEBUG| [stdout] # ---- IPv4 UDP ---- 04:29:17 DEBUG| [stdout] # send cpu 0, receive socket 0 (lines skipped) 04:29:17 DEBUG| [stdout] # send cpu 159, receive socket 159 04:29:17 DEBUG| [stdout] # ---- IPv6 UDP ---- 04:29:17 DEBUG| [stdout] # send cpu 0, receive socket 0 (lines skipped) 04:29:17 DEBUG| [stdout] # send cpu 159, receive socket 159 04:29:17 DEBUG| [stdout] # ---- IPv4 TCP ---- 04:29:17 DEBUG| [stdout] # send cpu 0, receive socket 0 (lines skipped) 04:29:17 DEBUG| [stdout] # send cpu 15, receive socket 15 (test hang here) I tried to run tests in this sru-misc suite in the following order: 'hwclock', 'ubuntu_bpf', 'ubuntu_bpf_jit', 'ubuntu_kernel_selftests', 'ubuntu_lxc', 'ubuntu_seccomp', 'ubuntu_unionmount_ovlfs', 'ubuntu_cts_kernel', 'ubuntu_kvm_unit_tests', One by one on this node, but I can't reproduce this issue. I tried to watch dmesg when this happens, but there is no information there, the system will be reboot automatically silently. This is what you can see from syslog after reboot: Mar 12 04:27:39 modoc kernel: [ 536.668305] Injecting error (-12) to MEM_GOING_OFFLINE Mar 12 04:27:39 modoc kernel: [ 536.684547] Injecting error (-12) to MEM_GOING_OFFLINE Mar 12 04:27:39 modoc kernel: [ 536.700907] Injecting error (-12) to MEM_GOING_OFFLINE Mar 12 04:27:39 modoc kernel: [ 536.717246] Injecting error (-12) to MEM_GOING_OFFLINE Mar 12 04:27:39 modoc kernel: [ 536.719288] page:c00c000000c4f000 refcount:1 mapcount:0 mapping:c000000f8cfe0fd1 index:0x7611c3e Mar 12 04:27:39 modoc kernel: [ 536.719289] anon Mar 12 04:27:39 modoc kernel: [ 536.719291] flags: 0x3ffff800080024(uptodate|active|swapbacked) Mar 12 04:27:39 modoc kernel: [ 536.719294] raw: 003ffff800080024 5deadbeef0000100 5deadbeef0000122 c000000f8cfe0fd1 Mar 12 04:27:39 modoc kernel: [ 536.719295] raw: 0000000007611c3e 0000000000000000 00000001ffffffff c000000fcfd1c000 Mar 12 04:27:39 modoc kernel: [ 536.719296] page dumped because: unmovable page Mar 12 04:27:39 modoc kernel: [ 536.719296] page->mem_cgroup:c000000fcfd1c000 Mar 12 04:27:39 modoc kernel: [ 536.735465] Injecting error (-12) to MEM_GOING_OFFLINE Mar 12 04:27:39 modoc kernel: [ 536.751848] Injecting error (-12) to MEM_GOING_OFFLINE Mar 12 04:27:39 modoc kernel: [ 536.768210] Injecting error (-12) to MEM_GOING_OFFLINE Mar 12 04:27:39 modoc kernel: [ 536.784450] Injecting error (-12) to MEM_GOING_OFFLINE Mar 12 04:27:39 modoc kernel: [ 536.800756] Injecting error (-12) to MEM_GOING_OFFLINE Mar 12 04:27:39 modoc kernel: [ 536.817006] Injecting error (-12) to MEM_GOING_OFFLINE Mar 12 04:27:39 modoc kernel: [ 536.833133] Injecting error (-12) to MEM_GOING_OFFLINE Mar 12 04:27:39 modoc kernel: [ 536.849205] Injecting error (-12) to MEM_GOING_OFFLINE Mar 12 04:27:39 modoc kernel: [ 536.865448] Injecting error (-12) to MEM_GOING_OFFLINE ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@Mar 12 04:35:41 modoc systemd[1]: Starting Flush Journal to Persistent Storage... Mar 12 04:35:41 modoc kernel: [ 0.000000] hash-mmu: Page sizes from device-tree: Mar 12 04:35:41 modoc kernel: [ 0.000000] hash-mmu: base_shift=12: shift=12, sllp=0x0000, avpnm=0x00000000, tlbiel=1, penc=0 Mar 12 04:35:41 modoc kernel: [ 0.000000] hash-mmu: base_shift=12: shift=16, sllp=0x0000, avpnm=0x00000000, tlbiel=1, penc=7 Mar 12 04:35:41 modoc kernel: [ 0.000000] hash-mmu: base_shift=12: shift=24, sllp=0x0000, avpnm=0x00000000, tlbiel=1, penc=56 Mar 12 04:35:41 modoc systemd[1]: Started udev Kernel Device Manager. From the log above, line "^@^@^@^@^@^" indicates the reboot. It looks like it's running the memory-hotplug test. Maybe we need to use IPMI to see if there is anything on the console. ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: linux-image-5.3.0-42-generic 5.3.0-42.34 ProcVersionSignature: Ubuntu 5.3.0-42.34-generic 5.3.18 Uname: Linux 5.3.0-42-generic ppc64le AlsaDevices: total 0 crw-rw---- 1 root audio 116, 1 Mar 12 04:33 seq crw-rw---- 1 root audio 116, 33 Mar 12 04:33 timer AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay' ApportVersion: 2.20.11-0ubuntu8.5 Architecture: ppc64el 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: Date: Thu Mar 12 09:42:24 2020 IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig': 'iwconfig' Lsusb: Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub PciMultimedia: ProcEnviron: TERM=xterm-256color PATH=(custom, no user) LANG=C.UTF-8 SHELL=/bin/bash ProcFB: ProcKernelCmdLine: root=UUID=b2a867ce-7813-4785-8861-4e7de2ac39b4 ro console=hvc0 ProcLoadAvg: 0.07 0.02 0.00 1/1461 86637 ProcLocks: 1: POSIX ADVISORY WRITE 3799 00:18:841 0 EOF 2: POSIX ADVISORY WRITE 3526 00:18:743 0 EOF 3: FLOCK ADVISORY WRITE 3720 00:18:837 0 EOF ProcSwaps: Filename Type Size Used Priority /swap.img file 8388544 0 -2 ProcVersion: Linux version 5.3.0-42-generic (buildd@bos02-ppc64el-006) (gcc version 9.2.1 20191008 (Ubuntu 9.2.1-9ubuntu2)) #34-Ubuntu SMP Fri Feb 28 05:49:17 UTC 2020 RelatedPackageVersions: linux-restricted-modules-5.3.0-42-generic N/A linux-backports-modules-5.3.0-42-generic N/A linux-firmware 1.183.4 RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) VarLogDump_list: total 0 cpu_cores: Number of cores present = 20 cpu_coreson: Number of cores online = 20 cpu_dscr: DSCR is 0 cpu_freq: min: 3.694 GHz (cpu 159) max: 3.695 GHz (cpu 1) avg: 3.694 GHz cpu_runmode: Could not retrieve current diagnostics mode, No kernel interface to firmware cpu_smt: SMT=8 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1867155/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp