RHEL8.5: kernel panic at xprt_rdma_bc_maxpayload+0xc

Issue

• The kernel panic with logs:

[2121612.247095] BUG: unable to handle kernel NULL pointer dereference at 000000000000011c
[2121612.256159] PGD 0 P4D 0 
[2121612.259270] Oops: 0000 [#1] SMP NOPTI
[2121612.263646] CPU: 6 PID: 92067 Comm: 7.132.29.57-man Kdump: loaded Tainted: G           OE    --------- -  - 4.18.0-348.23.1.el8_5.x86_64 #1
[2121612.277952] Hardware name: Dell Inc. PowerEdge R630/0CNCJW, BIOS 2.15.0 06/27/2022
[2121612.286731] RIP: 0010:xprt_rdma_bc_maxpayload+0xc/0x40 [rpcrdma]
[2121612.293729] Code: 48 89 ee e8 86 a9 d9 ca 48 8b 03 48 85 c0 75 e5 31 c0 5b 5d 41 5c c3 0f 1f 80 00 00 00 00 0f 1f 44 00 00 48 8b 97 90 07 00 00 <8b> 82 1c 01 00 00 39 82 18 01 00 00 0f 46 82 18 01 00 00 ba 00 10
[2121612.315052] RSP: 0018:ffffa311279c7d90 EFLAGS: 00010206
[2121612.321175] RAX: ffffffffc0c66ae0 RBX: ffff8c14785be800 RCX: 0000000000000000
[2121612.329449] RDX: 0000000000000000 RSI: ffffffffc0417260 RDI: ffff8c1478466000
[2121612.337731] RBP: ffffa311279c7e90 R08: ffff8c0effaeabf8 R09: 0000000000000001
[2121612.346012] R10: ffffa311279c7ea8 R11: 0000000000001a53 R12: ffff8c0fce50f000
[2121612.354293] R13: ffff8c10d6b70600 R14: ffffa311279c7e10 R15: 0000000000000000
[2121612.362574] FS:  0000000000000000(0000) GS:ffff8c0effac0000(0000) knlGS:0000000000000000
[2121612.371924] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[2121612.378630] CR2: 000000000000011c CR3: 000000161e610001 CR4: 00000000001707e0
[2121612.386911] Call Trace:
[2121612.389952]  rpc_max_bc_payload+0x19/0x20 [sunrpc]
[2121612.395604]  _nfs4_proc_create_session+0xdb/0x370 [nfsv4]
[2121612.401934]  ? nfs4_proc_create_session+0x2e/0x70 [nfsv4]
[2121612.408260]  nfs4_proc_create_session+0x2e/0x70 [nfsv4]
[2121612.414391]  nfs4_state_manager+0x6e3/0x860 [nfsv4]
[2121612.420134]  ? nfs4_state_manager+0x860/0x860 [nfsv4]
[2121612.426070]  nfs4_run_state_manager+0x20/0x40 [nfsv4]
[2121612.432000]  kthread+0x116/0x130
[2121612.435890]  ? kthread_flush_work_fn+0x10/0x10
[2121612.441139]  ret_from_fork+0x1f/0x40
[2121612.445417] Modules linked in: xsk_diag udp_diag raw_diag unix_diag af_packet_diag netlink_diag vfat fat uas usb_storage rpcsec_gss_krb5 nfsv4 dns_resolver nfsv3 nfs_acl nfs lockd grace fscache mmfs26(OE) mmfslinux(OE) tracedev(OE) auth_rpcgss fuse(OE) ib_ipoib(OE) tcp_diag inet_diag mpt3sas raid_class scsi_transport_sas dell_rbu mlx4_en(OE) intel_rapl_msr iTCO_wdt iTCO_vendor_support mxm_wmi dcdbas intel_rapl_common x86_pkg_temp_thermal intel_powerclamp coretemp rapl intel_cstate intel_uncore pcspkr rpcrdma rdma_ucm(OE) rdma_cm(OE) iw_cm(OE) ib_umad(OE) ipmi_ssif drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm lpc_ich mei_me mei ipmi_si ipmi_devintf ipmi_msghandler wmi acpi_power_meter binfmt_misc ext4 mbcache jbd2 loop squashfs mlx4_ib(OE) ib_uverbs(OE) dm_multipath sd_mod t10_pi sg ahci libahci crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel mlx4_core(OE) libata igb megaraid_sas i2c_algo_bit ib_cm(OE) ib_core(OE) ixgbe dca mdio sunrpc dm_mirror
[2121612.445449]  dm_region_hash dm_log dm_mod [last unloaded: ib_ipoib]
[2121612.550253] Features: eBPF/LSM eBPF/rawtrace eBPF/event
[2121612.556377] CR2: 000000000000011c