Hi Andrew, I just retest this manually on node entei with the steps in comment #3, and this issue can be reproduced (system gets reboot) with a different message from the ipmi console.
[ 417.696448] BUG: Unable to handle kernel instruction fetch (NULL pointer?) [ 417.696522] Faulting instruction address: 0x00000000 [ 417.696677] Oops: Kernel access of bad area, sig: 11 [#1] [ 417.696693] LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA PowerNV [ 417.696715] Modules linked in: binfmt_misc dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua joydev input_leds mac_hid ofpart plx_dma cmdlinepart ipmi_powernv pow ernv_flash ipmi_devintf ibmpowernv at24 vmx_crypto opal_prd ipmi_msghandler powernv_rng mtd uio_pdrv_genirq uio sch_fq_codel ip_tables x_tables autofs4 btrfs blake2b_ generic uas raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor hid_generic usbhid hid usb_storage async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear ast drm_vram_helper i2c_algo_bit drm_ttm_helper ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops crct10dif_vpmsum cec crc32c_vpmsum rc_core drm ahci tg3 xhci_pci libahci drm_panel_orientation_quirks xhci_pci_renesas [ 417.697008] CPU: 0 PID: 3117 Comm: reuseport_bpf_c Not tainted 5.11.0-27-generic #29~20.04.1-Ubuntu [ 417.697034] NIP: 0000000000000000 LR: c000000000e77ba8 CTR: 0000000000000000 [ 417.697055] REGS: c0000007ff6e74d0 TRAP: 0400 Not tainted (5.11.0-27-generic) [ 417.697077] MSR: 9000000040009033 <SF,HV,EE,ME,IR,DR,RI,LE> CR: 28022444 XER: 20000000 [ 417.697309] CFAR: c000000000010300 IRQMASK: 0 [ 417.697309] GPR00: c000000000e77b80 c0000007ff6e7770 c000000001e99600 c000000014cecd00 [ 417.697309] GPR04: c008000004230038 c000000014cecd00 0000000000000008 0000000000000001 [ 417.697309] GPR08: 0000000000000001 0000000000000000 c0000000501e9580 0000000000000000 [ 417.697309] GPR12: 0000000000000000 c000000002150000 0000000000000000 0000000000000000 [ 417.697309] GPR16: 0000000000000040 c00000078e09a480 0000000000000001 0000000000000001 [ 417.697309] GPR20: 00000000000022b8 0000000000000000 000000000000cfb3 000000000100007f [ 417.697309] GPR24: 0000000000000000 0000000000000008 c000000001dba880 c008000004230000 [ 417.697309] GPR28: 0000000000000080 c000000003292000 0000000090dd40dc c000000014cecd00 [ 417.697503] NIP [0000000000000000] 0x0 [ 417.697517] LR [c000000000e77ba8] reuseport_select_sock+0x108/0x3f0 [ 417.697541] Call Trace: [ 417.697550] [c0000007ff6e7810] [c000000000f64314] udp4_lib_lookup2+0x1a4/0x2b0 [ 417.697576] [c0000007ff6e7890] [c000000000f65928] __udp4_lib_lookup+0x358/0x540 [ 417.697602] [c0000007ff6e79d0] [c000000000f66978] __udp4_lib_rcv+0x608/0xe10 [ 417.697626] [c0000007ff6e7af0] [c000000000f0fa20] ip_protocol_deliver_rcu+0x60/0x2c0 [ 417.697813] [c0000007ff6e7b40] [c000000000f0fcf0] ip_local_deliver_finish+0x70/0x90 [ 417.697838] [c0000007ff6e7b60] [c000000000f0fda0] ip_local_deliver+0x90/0x180 [ 417.697861] [c0000007ff6e7be0] [c000000000f0f140] ip_rcv_finish+0xc0/0xf0 [ 417.697883] [c0000007ff6e7c20] [c000000000f0ffa8] ip_rcv+0x118/0x130 [ 417.697904] [c0000007ff6e7ca0] [c000000000e3a3b4] __netif_receive_skb_one_core+0x74/0xb0 [ 417.698083] [c0000007ff6e7cf0] [c000000000e3a770] process_backlog+0xd0/0x230 [ 417.698108] [c0000007ff6e7d60] [c000000000e3cf88] net_rx_action+0x1e8/0x580 [ 417.698130] [c0000007ff6e7e70] [c0000000010a94c0] __do_softirq+0x160/0x404 [ 417.698152] [c0000007ff6e7f90] [c00000000002bad8] call_do_softirq+0x14/0x24 [ 417.698174] [c00000005021b760] [c000000000017158] do_softirq_own_stack+0x38/0x50 [ 417.698199] [c00000005021b780] [c0000000001576e0] do_softirq+0xa0/0xb0 [ 417.698391] [c00000005021b7b0] [c0000000001577e8] __local_bh_enable_ip+0xf8/0x120 [ 417.698415] [c00000005021b7d0] [c000000000f1418c] ip_finish_output2+0x1fc/0x730 [ 417.698439] [c00000005021b870] [c000000000f178fc] ip_output+0xdc/0x1c0 [ 417.698460] [c00000005021b920] [c000000000f16cb4] ip_local_out+0x64/0x90 [ 417.698482] [c00000005021b960] [c000000000f18634] ip_send_skb+0x34/0xc0 [ 417.698667] [c00000005021b990] [c000000000f6074c] udp_send_skb.isra.0+0x16c/0x4a0 [ 417.698691] [c00000005021b9e0] [c000000000f61490] udp_sendmsg+0x960/0xcf0 [ 417.698714] [c00000005021bbd0] [c000000000f77cd4] inet_sendmsg+0x64/0xb0 [ 417.698735] [c00000005021bc10] [c000000000dfb3a0] sock_sendmsg+0x80/0xb0 [ 417.698758] [c00000005021bc40] [c000000000dfffd8] __sys_sendto+0xf8/0x1b0 [ 417.698910] [c00000005021bd90] [c000000000e00100] sys_send+0x30/0x40 [ 417.698932] [c00000005021bdb0] [c000000000036204] system_call_exception+0xf4/0x200 [ 417.698999] [c00000005021be10] [c00000000000d860] system_call_common+0xf0/0x27c [ 417.699023] --- interrupt: c00 at 0x7aef2b250724 [ 417.699040] NIP: 00007aef2b250724 LR: 000005f77e131568 CTR: 0000000000000000 [ 417.716065] REGS: c00000005021be80 TRAP: 0c00 Not tainted (5.11.0-27-generic) [ 417.716693] MSR: 900000000280f033 <SF,HV,VEC,VSX,EE,PR,FP,ME,IR,DR,RI,LE> CR: 28004440 XER: 00000000 [ 417.717786] IRQMASK: 0 [ 417.717786] GPR00: 000000000000014e 00007fffed1b68e0 00007aef2b337100 0000000000000084 [ 417.717786] GPR04: 000005f77e131f08 0000000000000001 0000000000000000 0000000000000000 [ 417.717786] GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 417.717786] GPR12: 0000000000000000 00007aef2b3ca330 0000000000000000 0000000000000000 [ 417.717786] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 417.717786] GPR20: 0000000000000001 000005f7b987049c 000000000000007f 00007fffed1b6b88 [ 417.717786] GPR24: 000005f7b987029c 0000000000000083 000005f7b98702a0 0000000000000002 [ 417.717786] GPR28: 0000000000000000 0000000000000080 0000000000000002 0000000000000084 [ 417.735682] NIP [00007aef2b250724] 0x7aef2b250724 [ 417.736172] LR [000005f77e131568] 0x5f77e131568 [ 417.736699] --- interrupt: c00 [ 417.736710] Instruction dump: [ 417.737229] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX [ 417.737755] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX XXXXXXXX [ 417.738770] ---[ end trace 9fc532dd6c3c783a ]--- [ 417.900679] [ 418.900837] Kernel panic - not syncing: Aiee, killing interrupt handler! [ 419.063147] Rebooting in 10 seconds.. [ 481.430090023,5] OPAL: Reboot request... -- 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/1927076 Title: IPv6 TCP in reuseport_bpf_cpu from ubuntu_kernel_selftests/net crash P8 node entei on 5.8 kernel (Oops: Exception in kernel mode, sig: 4 [#1]) Status in ubuntu-kernel-tests: New Status in The Ubuntu-power-systems project: Incomplete Status in linux package in Ubuntu: Incomplete Bug description: It looks like our P8 node "entei" tend to fail with the IPv6 TCP test from reuseport_bpf_cpu in ubuntu_kernel_selftests/net on 5.8 kernels: # send cpu 119, receive socket 119 # send cpu 121, receive socket 121 # send cpu 123, receive socket 123 # send cpu 125, receive socket 125 # send cpu 127, receive socket 127 # ---- IPv6 TCP ---- publish-job-status: using request.json It failed silently here, this can be 100% reproduced with Groovy 5.8 and Focal 5.8. This will cause the ubuntu_kernel_selftests being interrupted, the test result for other tests cannot be processed to our result page. Please find attachment for the complete "net" test result on this node with Groovy 5.8.0-52.59 Add the kqa-blocker tag as this might needs to be manually verified. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-kernel-tests/+bug/1927076/+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
