Please test latest mainline kernel: https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.8-rc4/
If mainline kernel works, then we need to backport some commits to filling gap between v5.4 and the offending commit. If mainline kernel doesn't work, we need to raise the issue to upstream. -- 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: Confirmed 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
