Oracle RAC cssdmonitor invoked the sysrq-c crash for node eviction

Issue

Oracle cssdmonitor invoked the sysrq-c crash for node eviction:

[331186.202673] SysRq : Trigger a crash
[331186.202711] BUG: unable to handle kernel NULL pointer dereference at           (null)
[331186.202730] IP: [<ffffffffba6755a6>] sysrq_handle_crash+0x16/0x20
[331186.202750] PGD 0 
[331186.202756] Oops: 0002 [#1] SMP 
[331186.202767] Modules linked in: oracleacfs(POE) oracleadvm(POE) oracleoks(POE) gsch(OE) redirfs(OE) bmhook(OE) tmhook(OE) dsa_filter(POE) dsa_filter_hook(OE) rpcsec_gss_krb5 nfsv4 dns_resolver nfs lockd grace fscache oracleasm(O) rpcrdma ib_isert iscsi_target_mod ib_iser libiscsi scsi_transport_iscsi ib_srpt target_core_mod ib_srp scsi_transport_srp ib_ipoib rdma_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm skx_edac intel_powerclamp coretemp intel_rapl iosf_mbi kvm_intel kvm irqbypass crc32_pclmul ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd pcspkr ib_core ipmi_ssif sg joydev mei_me mei lpc_ich wmi ipmi_si ipmi_devintf ipmi_msghandler acpi_power_meter acpi_pad binfmt_misc auth_rpcgss sunrpc ip_tables xfs libcrc32c dm_service_time sd_mod crc_t10dif crct10dif_generic mgag200
[331186.202974]  i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm ahci fnic crct10dif_pclmul crct10dif_common libfcoe crc32c_intel drm libfc libahci libata enic scsi_transport_fc scsi_tgt drm_panel_orientation_quirks nfit libnvdimm dm_multipath dm_mirror dm_region_hash dm_log dm_mod
[331186.203052] CPU: 8 PID: 12268 Comm: cssdmonitor Kdump: loaded Tainted: P           OE  ------------   3.10.0-1160.59.1.el7.x86_64 #1
[331186.203078] Hardware name: Cisco Systems Inc UCSB-B200-M5/UCSB-B200-M5, BIOS B200M5.4.0.2c.0.0204190150 02/04/2019
[331186.203100] task: ffff88b848d48000 ti: ffff88b84b4d0000 task.ti: ffff88b84b4d0000
[331186.203116] RIP: 0010:[<ffffffffba6755a6>]  [<ffffffffba6755a6>] sysrq_handle_crash+0x16/0x20
[331186.203136] RSP: 0018:ffff88b84b4d3d40  EFLAGS: 00010246
[331186.203148] RAX: ffffffffba675590 RBX: ffffffffbaee74a0 RCX: 0000000000000000
[331186.203163] RDX: 0000000000000000 RSI: ffff88ccfc0138d8 RDI: 0000000000000063
[331186.203177] RBP: ffff88b84b4d3d40 R08: ffffffffbb20487c R09: ffff88bf606a0500
[331186.203193] R10: 0000000000000d31 R11: 0000000000000d30 R12: 0000000000000063
[331186.203208] R13: 0000000000000000 R14: 0000000000000004 R15: 00007fe3b00380b0
[331186.203223] FS:  00007fe3e5f81700(0000) GS:ffff88ccfc000000(0000) knlGS:0000000000000000
[331186.203241] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[331186.203253] CR2: 0000000000000000 CR3: 0000000b68428000 CR4: 00000000007607e0
[331186.203269] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[331186.203284] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[331186.203298] PKRU: 55555554
[331186.203305] Call Trace:
[331186.203314]  [<ffffffffba675dcd>] __handle_sysrq+0x10d/0x170
[331186.203328]  [<ffffffffba676238>] write_sysrq_trigger+0x28/0x40
[331186.203343]  [<ffffffffba4c7770>] proc_reg_write+0x40/0x80
[331186.203356]  [<ffffffffba44e590>] vfs_write+0xc0/0x1f0
[331186.203369]  [<ffffffffba44f36f>] SyS_write+0x7f/0xf0
[331186.203383]  [<ffffffffba98b8a2>] ? down_read+0x12/0x40
[331186.203398]  [<ffffffffc0e55cf5>] tmhook_invoke.isra.8+0x45/0x90 [tmhook]
[331186.203414]  [<ffffffffc0e55ee8>] tmhook_handler+0x1a8/0x2c0 [tmhook]
[331186.203430]  [<ffffffffba999f92>] system_call_fastpath+0x25/0x2a
[331186.203443] Code: eb 9b 45 01 f4 45 39 65 34 75 e5 4c 89 ef e8 e2 f7 ff ff eb db 0f 1f 44 00 00 55 48 89 e5 c7 05 31 29 7d 00 01 00 00 00 0f ae f8 <c6> 04 25 00 00 00 00 01 5d c3 0f 1f 44 00 00 55 31 c0 c7 05 ae 
[331186.203531] RIP  [<ffffffffba6755a6>] sysrq_handle_crash+0x16/0x20
[331186.204138]  RSP <ffff88b84b4d3d40>
[331186.204726] CR2: 0000000000000000