I'm sad to say, but it seems it did not fix our problem. The crash happened again after running for about an hour:
[ 4914.661585] BUG: unable to handle page fault for address: ffffffffffffffb0 [ 4914.661620] #PF: supervisor read access in kernel mode [ 4914.661638] #PF: error_code(0x0000) - not-present page [ 4914.661656] PGD 1b6580e067 P4D 1b6580e067 PUD 1b65810067 PMD 0 [ 4914.661680] Oops: 0000 [#1] SMP NOPTI [ 4914.661695] CPU: 12 PID: 4840 Comm: kworker/u130:5 Tainted: P OE 5.4.0-39-generic #43-Ubuntu [ 4914.661725] Hardware name: GIGABYTE G291-Z20-00/MZ21-G20-00, BIOS F06 10/04/2019 [ 4914.661770] Workqueue: rpciod rpc_async_schedule [sunrpc] [ 4914.661803] RIP: 0010:nfs4_get_valid_delegation+0xd/0x30 [nfsv4] [ 4914.661824] Code: 89 ef e8 76 0f ce ff e9 ec fd ff ff 90 0f 1f 44 00 00 55 48 89 e5 f0 80 4f 48 08 5d c3 0f 1f 44 00 00 55 31 f6 48 89 e5 41 54 <4c> 8b 67 b0 4c 89 e7 e8 07 f9 ff ff 84 c0 b8 00 00 00 00 4c 0f 44 [ 4914.661879] RSP: 0018:ffffa0c1e0193d98 EFLAGS: 00010246 [ 4914.661898] RAX: ffff8b35bd8400c0 RBX: ffff8b3dc849f000 RCX: 0000000000000000 [ 4914.661920] RDX: 0000000000008000 RSI: 0000000000000000 RDI: 0000000000000000 [ 4914.661942] RBP: ffffa0c1e0193da0 R08: 0000000000000000 R09: 8080808080808080 [ 4914.661965] R10: ffff8b3da8b397ac R11: 0000000000000018 R12: ffff8b3d93417300 [ 4914.661988] R13: 0000000000000000 R14: ffff8b45ccf6e000 R15: ffffffffc0696950 [ 4914.662011] FS: 0000000000000000(0000) GS:ffff8b3dcf900000(0000) knlGS:0000000000000000 [ 4914.662036] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 4914.662056] CR2: ffffffffffffffb0 CR3: 00000007df20e000 CR4: 00000000003406e0 [ 4914.662078] Call Trace: [ 4914.662101] nfs4_open_prepare+0x89/0x1e0 [nfsv4] [ 4914.662128] rpc_prepare_task+0x1f/0x30 [sunrpc] [ 4914.662154] __rpc_execute+0x8c/0x3a0 [sunrpc] [ 4914.662179] rpc_async_schedule+0x30/0x50 [sunrpc] [ 4914.662199] process_one_work+0x1eb/0x3b0 [ 4914.662215] worker_thread+0x4d/0x400 [ 4914.662230] kthread+0x104/0x140 [ 4914.662244] ? process_one_work+0x3b0/0x3b0 [ 4914.662259] ? kthread_park+0x90/0x90 [ 4914.662275] ret_from_fork+0x1f/0x40 [ 4914.662290] Modules linked in: rpcsec_gss_krb5 auth_rpcgss md4 cmac nfsv4 nls_utf8 cifs nfs libarc4 lockd grace libdes fscache aufs overlay ipmi_ssif binfmt_misc snd_hda_codec_hdmi amd64_edac_mod edac_mce_amd kvm_amd nls_iso8859_1 kvm snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi ucsi_ccg snd_seq_midi_event typec_ucsi typec snd_rawmidi snd_seq snd_seq_device snd_timer snd soundcore k10temp ccp ipmi_si mac_hid nvidia_uvm(OE) sch_fq_codel parport_pc ppdev lp parport sunrpc ip_tables x_tables autofs4 mlx5_ib nvidia_drm(POE) nvidia_modeset(POE) ib_uverbs ib_core nvidia(POE) crct10dif_pclmul crc32_pclmul ghash_clmulni_intel ast drm_vram_helper i2c_algo_bit ttm aesni_intel mlx5_core drm_kms_helper ixgbe syscopyarea crypto_simd sysfillrect nvme sysimgblt fb_sys_fops pci_hyperv_intf cryptd xfrm_algo dca glue_helper mdio drm tls nvme_core ahci mlxfw libahci ipmi_devintf i2c_piix4 ipmi_msghandler i2c_nvidia_gpu [ 4914.662566] CR2: ffffffffffffffb0 [ 4914.662581] ---[ end trace cdb67bb8c51af6b1 ]--- [ 4914.662608] RIP: 0010:nfs4_get_valid_delegation+0xd/0x30 [nfsv4] [ 4914.663407] Code: 89 ef e8 76 0f ce ff e9 ec fd ff ff 90 0f 1f 44 00 00 55 48 89 e5 f0 80 4f 48 08 5d c3 0f 1f 44 00 00 55 31 f6 48 89 e5 41 54 <4c> 8b 67 b0 4c 89 e7 e8 07 f9 ff ff 84 c0 b8 00 00 00 00 4c 0f 44 [ 4914.665002] RSP: 0018:ffffa0c1e0193d98 EFLAGS: 00010246 [ 4914.665836] RAX: ffff8b35bd8400c0 RBX: ffff8b3dc849f000 RCX: 0000000000000000 [ 4914.666646] RDX: 0000000000008000 RSI: 0000000000000000 RDI: 0000000000000000 [ 4914.667858] RBP: ffffa0c1e0193da0 R08: 0000000000000000 R09: 8080808080808080 [ 4914.669136] R10: ffff8b3da8b397ac R11: 0000000000000018 R12: ffff8b3d93417300 [ 4914.670414] R13: 0000000000000000 R14: ffff8b45ccf6e000 R15: ffffffffc0696950 [ 4914.671692] FS: 0000000000000000(0000) GS:ffff8b3dcf900000(0000) knlGS:0000000000000000 [ 4914.672980] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 4914.674267] CR2: ffffffffffffffb0 CR3: 00000007df20e000 CR4: 00000000003406e0 This was with (env) orexplore@sleipner:~$ uname -a Linux sleipner 5.4.0-39-generic #43-Ubuntu SMP Fri Jun 19 10:28:31 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux (env) orexplore@sleipner:~$ from linux-image-5.4.0-39-generic 5.4.0-39.43 in focal-proposed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1885010 Title: NULL deference in nfs4_get_valid_delegation To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1885010/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
