[2019-09-19 21:21:15 UTC] [  491.504056] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
[2019-09-19 21:21:15 UTC] [  491.517143] PGD 2687e8067 P4D 2687e8067 PUD 2686f0067 PMD 0 
[2019-09-19 21:21:15 UTC] [  491.530608] Oops: 0010 [#1] SMP NOPTI
[2019-09-19 21:21:15 UTC] [  491.543577] CPU: 2 PID: 24932 Comm: efibootmgr Tainted: G           O      4.19.0+1 #1
[2019-09-19 21:21:15 UTC] [  491.556686] Hardware name: Supermicro MBI-6119G-T4-PACK/B2SS1-F, BIOS 2.2 05/16/2018
[2019-09-19 21:21:15 UTC] [  491.569745] RIP: e030:          (null)
[2019-09-19 21:21:15 UTC] [  491.582854] Code: Bad RIP value.
[2019-09-19 21:21:15 UTC] [  491.595803] RSP: e02b:ffffc900418fbcb8 EFLAGS: 00010246
[2019-09-19 21:21:15 UTC] [  491.608771] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000000000
[2019-09-19 21:21:15 UTC] [  491.621734] RDX: 0000000000000007 RSI: ffffc900418fbcc0 RDI: ffffffff81c09750
[2019-09-19 21:21:15 UTC] [  491.634481] RBP: ffffc900418fbce8 R08: 0000000000000000 R09: ffff888281c02a80
[2019-09-19 21:21:15 UTC] [  491.646984] R10: 0000000000000007 R11: ffffffff81c09750 R12: 00000000000000a2
[2019-09-19 21:21:15 UTC] [  491.659465] R13: ffff888267d0a000 R14: 0000000000001813 R15: ffffffff820bbb00
[2019-09-19 21:21:15 UTC] [  491.671962] FS:  00007f28f2626740(0000) GS:ffff888282c80000(0000) knlGS:0000000000000000
[2019-09-19 21:21:15 UTC] [  491.684506] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
[2019-09-19 21:21:15 UTC] [  491.696952] CR2: ffffffffffffffd6 CR3: 000000024492a000 CR4: 0000000000040660
[2019-09-19 21:21:15 UTC] [  491.709443] Call Trace:
[2019-09-19 21:21:15 UTC] [  491.721799]  ? efi_delete_dummy_variable+0x90/0xb0
[2019-09-19 21:21:15 UTC] [  491.734095]  ? efi_query_variable_store+0x1b1/0x1c0
[2019-09-19 21:21:15 UTC] [  491.746297]  ? efivar_entry_set+0xc6/0x160
[2019-09-19 21:21:16 UTC] [  491.758340]  ? _cond_resched+0x15/0x30
[2019-09-19 21:21:16 UTC] [  491.770256]  ? efivar_create+0x133/0x240
[2019-09-19 21:21:16 UTC] [  491.782087]  ? kernfs_fop_write+0x110/0x190
[2019-09-19 21:21:16 UTC] [  491.793895]  ? __vfs_write+0x36/0x1a0
[2019-09-19 21:21:16 UTC] [  491.805625]  ? __check_object_size+0x15d/0x1b0
[2019-09-19 21:21:16 UTC] [  491.817340]  ? _cond_resched+0x15/0x30
[2019-09-19 21:21:16 UTC] [  491.828976]  ? vfs_write+0xad/0x1a0
[2019-09-19 21:21:16 UTC] [  491.840613]  ? ksys_write+0x52/0xc0
[2019-09-19 21:21:16 UTC] [  491.852208]  ? do_syscall_64+0x4e/0x100
[2019-09-19 21:21:16 UTC] [  491.863767]  ? entry_SYSCALL_64_after_hwframe+0x44/0xa9
[2019-09-19 21:21:16 UTC] [  491.875399] Modules linked in: nls_iso8859_1 nls_cp437 vfat fat rpcsec_gss_krb5 auth_rpcgss oid_registry nfsv4 nfs lockd grace fscache sunrpc dm_mod intel_powerclamp crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd cryptd glue_helper hid_generic usbhid sd_mod sg hid intel_rapl_perf ahci xhci_pci intel_ish_ipc libahci i2c_i801 intel_ishtp mei_me libata xhci_hcd igb(O) mei intel_pch_thermal ie31200_edac ipmi_ssif ipmi_devintf ipmi_msghandler video backlight acpi_power_meter iscsi_ibft iscsi_boot_sysfs iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi scsi_mod efivarfs ip_tables x_tables ipv6 crc_ccitt
[2019-09-19 21:21:16 UTC] [  491.926818] CR2: 0000000000000000
[2019-09-19 21:21:16 UTC] [  491.940216] ---[ end trace db8d9ba3c35ae09d ]---
[2019-09-19 21:21:16 UTC] [  492.004947] RIP: e030:          (null)
[2019-09-19 21:21:16 UTC] [  492.018554] Code: Bad RIP value.
[2019-09-19 21:21:16 UTC] [  492.032153] RSP: e02b:ffffc900418fbcb8 EFLAGS: 00010246
[2019-09-19 21:21:16 UTC] [  492.045954] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000000000
[2019-09-19 21:21:16 UTC] [  492.059655] RDX: 0000000000000007 RSI: ffffc900418fbcc0 RDI: ffffffff81c09750
[2019-09-19 21:21:16 UTC] [  492.073297] RBP: ffffc900418fbce8 R08: 0000000000000000 R09: ffff888281c02a80
[2019-09-19 21:21:16 UTC] [  492.086887] R10: 0000000000000007 R11: ffffffff81c09750 R12: 00000000000000a2
[2019-09-19 21:21:16 UTC] [  492.100494] R13: ffff888267d0a000 R14: 0000000000001813 R15: ffffffff820bbb00
[2019-09-19 21:21:16 UTC] [  492.114035] FS:  00007f28f2626740(0000) GS:ffff888282c80000(0000) knlGS:0000000000000000