RHEL8: Kernel panic at nlmsvc_testlock+0xaf

Issue

• Kernel panic with below logs:

[11953.934616] lockd: creating file for (0a010001 00033650 02000002 00000000 a17e28a4 00000001 0000
0000 3bf31619)
[11953.934938] lockd: found file 00000000b19f57d8 (count 0)
[11953.934939] lockd: get host smtcac1658
[11953.934942] lockd: nlmsvc_testlock(gpfs/7004367012, ty=1, 0-9223372036854775807)
[11953.935425] lockd: conflicting lock(ty=1, 0-9223372036854775807)
[11953.935437] BUG: unable to handle kernel paging request at ffff93a8a2c2a368
[11953.935927] PGD 0 P4D 0 
[11953.936388] Oops: 0000 [#1] SMP NOPTI
[11953.936832] CPU: 43 PID: 587794 Comm: lockd Kdump: loaded Tainted: G           OE    --------- -  - 4.18.0-240.22.1.el8_3.x86_64 #1
[11953.937842] Hardware name: Lenovo ThinkSystem SR650 -[7X06CTOLWW]-/-[7X06CTOLWW]-, BIOS -[IVE168J-2.91]- 04/01/2021
[11953.938445] RIP: 0010:nlmsvc_testlock+0xaf/0x130 [lockd]
[11953.939060] Code: 08 0f 85 41 59 00 00 48 c7 45 00 86 aa 8b c0 4c 89 e7 c7 45 08 08 00 00 00 c7 85 90 00 00 00 00 00 00 00 48 8b 83 f0 00 00 00 <8b> 40 28 89 85 a0 00 00 00 0f b6 83 fc 00 00 00 88 85 fc 00 00 00
[11953.940444] RSP: 0018:ffffb0288d7bbdc8 EFLAGS: 00010246
[11953.941172] RAX: ffff93a8a2c2a340 RBX: ffff9d46fffeb428 RCX: 0000000000000006
[11953.941803] RDX: 0000000000000000 RSI: 0000000000000092 RDI: ffff9d46fffeb4d0
[11953.942393] RBP: ffff9d46fffe9228 R08: 0000000000456ec3 R09: 0000000000000007
[11953.942996] R10: 0000000000000000 R11: 0000000000000001 R12: ffff9d46fffeb4d0
[11953.943614] R13: ffff9d3fc26d2d00 R14: ffff9d44eed7c600 R15: ffffffffc08b8250
[11953.944246] FS:  0000000000000000(0000) GS:ffff9d47c00c0000(0000) knlGS:0000000000000000
[11953.944904] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[11953.945574] CR2: ffff93a8a2c2a368 CR3: 00000003a6a0a006 CR4: 00000000007606e0
[11953.946269] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[11953.946976] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[11953.947685] PKRU: 55555554
[11953.948398] Call Trace:
[11953.949125]  __nlm4svc_proc_test+0xc2/0x110 [lockd]
[11953.949897]  svc_process_common+0x64f/0x700 [sunrpc]
[11953.950651]  ? grace_ender+0x20/0x20 [lockd]
[11953.951382]  ? grace_ender+0x20/0x20 [lockd]
[11953.951748]  svc_process+0xd1/0x110 [sunrpc]
[11953.952102]  lockd+0xae/0x190 [lockd]
[11953.952459]  ? __kthread_parkme+0x4c/0x70
[11953.952818]  kthread+0x112/0x130
[11953.953181]  ? kthread_flush_work_fn+0x10/0x10
[11953.953550]  ret_from_fork+0x1f/0x40
[11953.953917] Modules linked in: nfsv3 nfs fscache tcp_diag inet_diag nfsd auth_rpcgss nfs_acl lockd grace mmfs26(OE) mmfslinux(OE) tracedev(OE) rdma_ucm(OE) rdma_cm(OE) iw_cm(OE) ib_ipoib(OE) ib_cm(OE) ib_umad(OE) mlx5_ib(OE) ib_uverbs(OE) mlx5_core(OE) ib_core(OE) mlx_compat(OE) tls mlxfw(OE) psample pci_hyperv_intf team_mode_loadbalance bonding team nf_log_ipv6 nf_log_ipv4 nf_log_common nft_log nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nf_tables_set nft_chain_nat nf_nat ip_set nf_tables nfnetlink esp6_offload esp6 esp4_offload esp4 sunrpc vfat fat intel_rapl_msr intel_rapl_common isst_if_common iTCO_wdt iTCO_vendor_support skx_edac nfit libnvdimm x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm irqbypass crct10dif_pclmul crc32_pclmul ghash_clmulni_intel intel_cstate ipmi_ssif intel_uncore cdc_ether ses usbnet enclosure joydev pcspkr intel_rapl_perf scsi_transport_sas mii mei_me i2c_i801 lpc_ich mei ioatdma
[11953.953956]  dca wmi ipmi_si ipmi_devintf ipmi_msghandler acpi_power_meter acpi_pad binfmt_misc ip_tables xfs sd_mod sg mgag200 drm_kms_helper syscopyarea sysfillrect sysimgblt nf_conntrack fb_sys_fops drm_vram_helper nf_defrag_ipv6 nf_defrag_ipv4 drm_ttm_helper ahci ttm libahci i40e drm megaraid_sas(OE) libcrc32c libata crc32c_intel i2c_algo_bit dm_mirror dm_region_hash dm_log dm_mod [last unloaded: tracedev]
[11953.959775] CR2: ffff93a8a2c2a368