Seems a same bug on Ubuntu 20.04 kernel 5.4.0-52. The bug reproduces for me only under high load of CPU(for example, java compilation process) --------------------- [10798.058030] bpfilter: Loaded bpfilter_umh pid 17193 [10798.058119] Started bpfilter [14269.588116] BUG: unable to handle page fault for address: ffff919d84135500 [14269.588119] #PF: supervisor read access in kernel mode [14269.588119] #PF: error_code(0x0000) - not-present page [14269.588120] PGD 1f4c01067 P4D 1f4c01067 PUD 0 [14269.588122] Oops: 0000 [#1] SMP NOPTI [14269.588123] CPU: 5 PID: 21991 Comm: Chrome_ChildIOT Kdump: loaded Not tainted 5.4.0-52-generic #57-Ubuntu [14269.588123] Hardware name: Gigabyte Technology Co., Ltd. B365M D3H/B365M D3H-CF, BIOS F3c 11/28/2019 [14269.588126] RIP: 0010:lock_page_memcg+0x1f/0x90 [14269.588127] Code: 0f 1f 84 00 00 00 00 00 0f 1f 00 0f 1f 44 00 00 55 48 89 e5 41 55 41 54 53 0f 1f 44 00 00 48 89 fb 4c 8b 67 38 4d 85 e4 74 36 <41> 8b 84 24 00 05 00 00 85 c0 7e 2d 4d 8d ac 24 b8 04 00 00 4c 89 [14269.588128] RSP: 0018:ffffb6ca43047bc8 EFLAGS: 00010286 [14269.588129] RAX: ffffeaf69e86afc0 RBX: ffffeaf69e86afc0 RCX: 8000000000000005 [14269.588129] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffeaf69e86afc0 [14269.588130] RBP: ffffb6ca43047be0 R08: ffffeaf69e86afc0 R09: 0000000000000000 [14269.588130] R10: 0000000000000001 R11: ffff91bdaf7d5000 R12: ffff919d84135000 [14269.588131] R13: 000055986f674000 R14: 80000007a1abf005 R15: 000055986f675000 [14269.588132] FS: 00007f7768299700(0000) GS:ffff91bd8f340000(0000) knlGS:0000000000000000 [14269.588132] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [14269.588133] CR2: ffff919d84135500 CR3: 00000001f420a002 CR4: 00000000003606e0 [14269.588134] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [14269.588134] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [14269.588134] Call Trace: [14269.588137] page_remove_rmap+0xa5/0x310 [14269.588139] ? tlb_flush_mmu+0x3a/0x140 [14269.588140] zap_pte_range.isra.0+0x273/0x7f0 [14269.588141] unmap_page_range+0x2da/0x4a0 [14269.588142] unmap_single_vma+0x7f/0xf0 [14269.588143] unmap_vmas+0x79/0xf0 [14269.588144] exit_mmap+0xb4/0x1b0 [14269.588146] mmput+0x5d/0x130 [14269.588147] do_exit+0x306/0xac0 [14269.588148] __x64_sys_exit+0x1b/0x20 [14269.588150] do_syscall_64+0x57/0x190 [14269.588152] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [14269.588153] RIP: 0033:0x559870c0bee5 [14269.588155] Code: Bad RIP value. [14269.588155] RSP: 002b:00007f77682979a0 EFLAGS: 00000246 ORIG_RAX: 000000000000003c [14269.588156] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000559870c0bee5 [14269.588156] RDX: 0000000000000001 RSI: 0000000000000009 RDI: 0000000000000000 [14269.588157] RBP: 00007f7768297d20 R08: 000000000000008c R09: 000000000000000e [14269.588157] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7768297d30 [14269.588158] R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000000 [14269.588159] Modules linked in: xt_tcpudp xt_state xt_conntrack nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 libcrc32c ip6table_filter ip6_tables iptable_filter bpfilter cpuid snd_hda_codec_hdmi intel_rapl_msr intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio mei_hdcp snd_hda_intel crct10dif_pclmul snd_intel_dspcfg ghash_clmulni_intel aesni_intel crypto_simd cryptd snd_hda_codec glue_helper rapl snd_hda_core intel_cstate snd_usb_audio snd_usbmidi_lib snd_hwdep mc snd_pcm nls_iso8859_1 snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq wmi_bmof i915 snd_seq_device snd_timer input_leds snd joydev soundcore drm_kms_helper i2c_algo_bit mei_me fb_sys_fops mei syscopyarea sysfillrect sysimgblt acpi_pad mac_hid acpi_tad sch_fq_codel parport_pc ppdev lp parport drm ip_tables x_tables autofs4 hid_generic usbhid hid crc32_pclmul nvme e1000e nvme_core i2c_i801 ahci libahci wmi video [14269.588179] CR2: ffff919d84135500
-- 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/1886277 Title: Regression on NFS: unable to handle page fault in mempool_alloc_slab Status in linux package in Ubuntu: Fix Released Status in linux source package in Focal: Fix Released Bug description: On kernel 5.4.0-40-generic in focal I'm getting errors like this on several machines with different hardware in the first hour after boot: Jul 04 16:58:32 hostname kernel: BUG: unable to handle page fault for address: ffff9083e222e632 Jul 04 16:58:32 hostname kernel: #PF: supervisor read access in kernel mode Jul 04 16:58:32 hostname kernel: #PF: error_code(0x0000) - not-present page Jul 04 16:58:32 hostname kernel: PGD 3ac205067 P4D 3ac205067 PUD 0 Jul 04 16:58:32 hostname kernel: Oops: 0000 [#1] SMP NOPTI Jul 04 16:58:32 hostname kernel: CPU: 4 PID: 289 Comm: kworker/u16:4 Tainted: G OE 5.4.0-40-generic #44-Ubuntu Jul 04 16:58:32 hostname kernel: Hardware name: LENOVO 20N2CTO1WW/20N2CTO1WW, BIOS N2IET88W (1.66 ) 04/22/2020 Jul 04 16:58:32 hostname kernel: Workqueue: rpciod rpc_async_schedule [sunrpc] Jul 04 16:58:32 hostname kernel: RIP: 0010:kmem_cache_alloc+0x7e/0x230 Jul 04 16:58:32 hostname kernel: Code: 99 01 00 00 4d 8b 07 65 49 8b 50 08 65 4c 03 05 40 9d 56 44 4d 8b 20 4d 85 e4 0f 84 85 01 00 00 41 8b 47 20 49 8b 3f 4c 01 e0 <48> 8b 18 48 89 c1 49 33 9f 70 01 00 00 4c 89 e0 48 0f c9 48 31 cb Jul 04 16:58:32 hostname kernel: RSP: 0018:ffffbc38c046fcc8 EFLAGS: 00010282 Jul 04 16:58:32 hostname kernel: RAX: ffff9083e222e632 RBX: 0000000000000000 RCX: 0000000000000002 Jul 04 16:58:32 hostname kernel: RDX: 0000000000000009 RSI: 0000000000092800 RDI: 0000000000031fb0 Jul 04 16:58:32 hostname kernel: RBP: ffffbc38c046fcf8 R08: ffff90836c331fb0 R09: ffffffffc1436a94 Jul 04 16:58:32 hostname kernel: R10: ffff908368178d2c R11: 0000000000000018 R12: ffff9083e222e632 Jul 04 16:58:32 hostname kernel: R13: 0000000000092800 R14: ffff908367ca6140 R15: ffff908367ca6140 Jul 04 16:58:32 hostname kernel: FS: 0000000000000000(0000) GS:ffff90836c300000(0000) knlGS:0000000000000000 Jul 04 16:58:32 hostname kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jul 04 16:58:32 hostname kernel: CR2: ffff9083e222e632 CR3: 00000003ab80a003 CR4: 00000000003606e0 Jul 04 16:58:32 hostname kernel: Call Trace: Jul 04 16:58:32 hostname kernel: ? mempool_alloc_slab+0x17/0x20 Jul 04 16:58:32 hostname kernel: mempool_alloc_slab+0x17/0x20 Jul 04 16:58:32 hostname kernel: mempool_alloc+0x64/0x180 Jul 04 16:58:32 hostname kernel: rpc_malloc+0xa1/0xb0 [sunrpc] Jul 04 16:58:32 hostname kernel: call_allocate+0xd1/0x1b0 [sunrpc] Jul 04 16:58:32 hostname kernel: ? call_refreshresult+0x100/0x100 [sunrpc] Jul 04 16:58:32 hostname kernel: __rpc_execute+0x8c/0x3a0 [sunrpc] Jul 04 16:58:32 hostname kernel: rpc_async_schedule+0x30/0x50 [sunrpc] Jul 04 16:58:32 hostname kernel: process_one_work+0x1eb/0x3b0 Jul 04 16:58:32 hostname kernel: worker_thread+0x4d/0x400 Jul 04 16:58:32 hostname kernel: kthread+0x104/0x140 Jul 04 16:58:32 hostname kernel: ? process_one_work+0x3b0/0x3b0 Jul 04 16:58:32 hostname kernel: ? kthread_park+0x90/0x90 Jul 04 16:58:32 hostname kernel: ret_from_fork+0x35/0x40 Jul 04 16:58:32 hostname kernel: Modules linked in: rfcomm rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace fscache vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) msr ccm cmac algif_hash algif_skcipher af_alg aufs bnep overlay nls_iso8859_1 mei_hdcp intel_rapl_msr snd_s> Jul 04 16:58:32 hostname kernel: nvram ledtrig_audio mei_me cfg80211 mei processor_thermal_device snd_seq ucsi_acpi typec_ucsi intel_rapl_common intel_soc_dts_iosf snd_seq_device typec intel_pch_thermal snd_timer snd int3403_thermal soundcore int340x_thermal_zone i> Jul 04 16:58:32 hostname kernel: pinctrl_cannonlake video pinctrl_intel Jul 04 16:58:32 hostname kernel: CR2: ffff9083e222e632 Jul 04 16:58:32 hostname kernel: ---[ end trace cbbaed921eb439ce ]--- Jul 04 16:58:32 hostname kernel: RIP: 0010:kmem_cache_alloc+0x7e/0x230 Jul 04 16:58:32 hostname kernel: Code: 99 01 00 00 4d 8b 07 65 49 8b 50 08 65 4c 03 05 40 9d 56 44 4d 8b 20 4d 85 e4 0f 84 85 01 00 00 41 8b 47 20 49 8b 3f 4c 01 e0 <48> 8b 18 48 89 c1 49 33 9f 70 01 00 00 4c 89 e0 48 0f c9 48 31 cb Jul 04 16:58:32 hostname kernel: RSP: 0018:ffffbc38c046fcc8 EFLAGS: 00010282 Jul 04 16:58:32 hostname kernel: RAX: ffff9083e222e632 RBX: 0000000000000000 RCX: 0000000000000002 Jul 04 16:58:32 hostname kernel: RDX: 0000000000000009 RSI: 0000000000092800 RDI: 0000000000031fb0 Jul 04 16:58:32 hostname kernel: RBP: ffffbc38c046fcf8 R08: ffff90836c331fb0 R09: ffffffffc1436a94 Jul 04 16:58:32 hostname kernel: R10: ffff908368178d2c R11: 0000000000000018 R12: ffff9083e222e632 Jul 04 16:58:32 hostname kernel: R13: 0000000000092800 R14: ffff908367ca6140 R15: ffff908367ca6140 Jul 04 16:58:32 hostname kernel: FS: 0000000000000000(0000) GS:ffff90836c300000(0000) knlGS:0000000000000000 Jul 04 16:58:32 hostname kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Jul 04 16:58:32 hostname kernel: CR2: ffff9083e222e632 CR3: 00000003ab80a003 CR4: 00000000003606e0 When booting 5.4.0-39-generic the problem does not occur. --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: lsysadmin 2042 F.... pulseaudio CasperMD5CheckResult: skip DistroRelease: Ubuntu 20.04 HibernationDevice: RESUME=UUID=9d3714bb-8799-42f9-a51d-790f87b0a7fc MachineType: LENOVO 20N2CTO1WW Package: linux (not installed) ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-40-generic root=/dev/mapper/vgmagiko-root ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 5.4.0-40.44-generic 5.4.44 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-5.4.0-40-generic N/A linux-backports-modules-5.4.0-40-generic N/A linux-firmware 1.187.1 Tags: focal Uname: Linux 5.4.0-40-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: N/A _MarkForUpload: True dmi.bios.date: 04/22/2020 dmi.bios.vendor: LENOVO dmi.bios.version: N2IET88W (1.66 ) dmi.board.asset.tag: Not Available dmi.board.name: 20N2CTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN2IET88W(1.66):bd04/22/2020:svnLENOVO:pn20N2CTO1WW:pvrThinkPadT490:rvnLENOVO:rn20N2CTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad T490 dmi.product.name: 20N2CTO1WW dmi.product.sku: LENOVO_MT_20N2_BU_Think_FM_ThinkPad T490 dmi.product.version: ThinkPad T490 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1886277/+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
