NULL pointer dereference in function '__assign_irq_vector()'.

Issue

The system crashes with the following error :

[   60.133619] BUG: unable to handle kernel NULL pointer dereference at 0000000000000019
[   60.133758] IP: [<ffffffff810564af>] __assign_irq_vector+0x2f/0x370
[   60.133862] PGD 0 
[   60.133900] Oops: 0000 [#1] SMP 
[   60.133963] Modules linked in: nvme nvme_core cxgb4vf(OE) cxgb4(OE) ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addr
type iptable_filter xt_conntrack nf_nat nf_conntrack br_netfilter bridge stp llc nfsv3 rpcsec_gss_krb5 nfsv4 dns_resolver nfs fscache overlay(T) rpcrdma ib_isert iscsi_targe
t_mod ib_iser libiscsi scsi_transport_iscsi ib_srpt target_core_mod ib_srp scsi_transport_srp scsi_tgt ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad rdma_cm ib_cm iw_cm i40iw ib_core vfat fat skx_edac iTCO_wdt iTCO_vendor_support edac_core 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 joydev sg mei_me mei i2c_i801 lpc_ich shpchp wmi ipmi_si ipmi_devintf
[   60.135453]  ipmi_msghandler tpm_crb nfit libnvdimm acpi_power_meter acpi_pad nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables xfs libcrc32c sd_mod crc_t10dif crct10dif_generic i2c_algo_bit drm_kms_helper crct10dif_pclmul crct10dif_common crc32c_intel syscopyarea sysfillrect sysimgblt fb_sys_fops ttm i40e drm ahci libahci libata ptp pps_core i2c_core dm_mirror dm_region_hash dm_log dm_mod [last unloaded: nvme_core]
[   60.136213] CPU: 31 PID: 6821 Comm: irqbalance Tainted: G           OE  ------------ T 3.10.0-693.el7.x86_64 #1
[   60.136368] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.00.01.2016.031420190801 03/14/2019
[   60.136532] task: ffff8817d924bf40 ti: ffff8817cfffc000 task.ti: ffff8817cfffc000
[   60.136649] RIP: 0010:[<ffffffff810564af>]  [<ffffffff810564af>] __assign_irq_vector+0x2f/0x370
[   60.136789] RSP: 0018:ffff8817cffffd28  EFLAGS: 00010046
[   60.136873] RAX: 0000000000000002 RBX: 0000000000000000 RCX: ffffffff8155c310
[   60.136985] RDX: ffff8817c415d400 RSI: 0000000000000000 RDI: 000000000000062d
[   60.137097] RBP: ffff8817cffffd78 R08: 0000000000000000 R09: 0000000000000007
[   60.137210] R10: 0000000000000000 R11: 0000000000000001 R12: 000000000000062d
[   60.137322] R13: 0000000000000000 R14: ffff8817c415d400 R15: ffff8817c415d400
[   60.137434] FS:  00007fa58f593780(0000) GS:ffff882fdc0c0000(0000) knlGS:0000000000000000
[   60.137561] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   60.137651] CR2: 0000000000000019 CR3: 00000017cfff8000 CR4: 00000000003407e0
[   60.137763] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   60.137875] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   60.137986] Stack:
[   60.138019]  ffff8817c415d400 ffff8817d924bf40 0000062dd924bf40 ffff8817cffffd98
[   60.138154]  0000000044c41496 0000000000000002 000000000000062d 0000000000000000
[   60.138288]  ffff8817c415d400 0000000000000286 ffff8817cffffda8 ffffffff81056dd6
[   60.138423] Call Trace:
[   60.138463]  [<ffffffff81056dd6>] assign_irq_vector+0x36/0x60
[   60.138555]  [<ffffffff8155c370>] intel_ioapic_set_affinity+0x60/0x1d0
[   60.138655]  [<ffffffff8155cbf0>] set_remapped_irq_affinity+0x20/0x30
[   60.138759]  [<ffffffff81131ccc>] irq_do_set_affinity+0x1c/0x70
[   60.138848]  [<ffffffff81131eb8>] irq_set_affinity_locked+0xa8/0xe0
[   60.138947]  [<ffffffff81131f36>] __irq_set_affinity+0x46/0x70
[   60.139041]  [<ffffffff81136009>] write_irq_affinity.isra.3+0x119/0x140
[   60.139143]  [<ffffffff81136069>] irq_affinity_proc_write+0x19/0x20
[   60.139245]  [<ffffffff8127018d>] proc_reg_write+0x3d/0x80
[   60.139331]  [<ffffffff81200d2d>] vfs_write+0xbd/0x1e0
[   60.143991]  [<ffffffff81201b3f>] SyS_write+0x7f/0xe0
[   60.148662]  [<ffffffff816b4fc9>] system_call_fastpath+0x16/0x1b
[   60.153337] Code: 00 55 48 89 e5 41 57 49 89 d7 41 56 41 55 41 54 53 48 83 ec 28 48 89 55 b0 89 7d c4 65 48 8b 1c 25 28 00 00 00 48 89 5d d0 31 db <f6> 46 19 01 48 89 75 b8 ba f0 ff ff ff 0f 85 c3 01 00 00 48 8d 
[   60.163353] RIP  [<ffffffff810564af>] __assign_irq_vector+0x2f/0x370
[   60.168134]  RSP <ffff8817cffffd28>
[   60.172853] CR2: 0000000000000019