System crashed while loading the module `ptapA04_`.

Issue

• System crashed with the below message.

...
[60613054.114702] ptap_ioctl: 1 buffer be allocated
[60613054.116936] ptap_hook process name ptapHook.exe,process id 26463
[60619991.135402] ptap_ioctl: 4 buffer be set
[60619991.135406] ptap_ioctl: 1 buffer be allocated
[60619992.351212] BUG: unable to handle kernel NULL pointer dereference at           (null)
[60619992.351265] IP: [<ffffffffa611b642>] _raw_spin_lock_irqsave+0x22/0x40
[60619992.351291] PGD 80000001d4810067 PUD 1d4811067 PMD 0 
[60619992.351309] Oops: 0002 [#1] SMP 
[60619992.351331] Modules linked in: ptapA04_(OE) splxmod(OE) binfmt_misc uinput sunrpc iosf_mbi crc32_pclmul ppdev ghash_clmulni_intel aesni_intel lrw gf128mul glue_helper ablk_helper cryptd sg joydev pcspkr virtio_rng parport_pc virtio_balloon parport i2c_piix4 softdog ip_tables xfs libcrc32c sr_mod cdrom sd_mod crc_t10dif crct10dif_generic ata_generic pata_acpi virtio_console virtio_net virtio_scsi qxl drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm drm ata_piix crct10dif_pclmul crct10dif_common crc32c_intel libata serio_raw i2c_core virtio_pci virtio_ring virtio floppy dm_mirror dm_region_hash dm_log dm_mod [last unloaded: splxmod]
[60619992.351559] CPU: 3 PID: 20269 Comm: KtapReaderP.exe Kdump: loaded Tainted: G           OE  ------------   3.10.0-862.11.6.el7.x86_64 #1
[60619992.351596] Hardware name: Red Hat RHEV Hypervisor, BIOS 1.11.0-2.el7 04/01/2014
[60619992.351618] task: ffff9bc5c7b68000 ti: ffff9bc90c214000 task.ti: ffff9bc90c214000
[60619992.351640] RIP: 0010:[<ffffffffa611b642>]  [<ffffffffa611b642>] _raw_spin_lock_irqsave+0x22/0x40
[60619992.351669] RSP: 0018:ffff9bc90c217e10  EFLAGS: 00010046
[60619992.351685] RAX: 0000000000000000 RBX: 0000000000000246 RCX: ffff9bc90c217e78
[60619992.351713] RDX: 0000000000000001 RSI: ffff9bc90c217e78 RDI: 0000000000000000
[60619992.351735] RBP: ffff9bc90c217e18 R08: 0000000000000000 R09: 0000000000000000
[60619992.351756] R10: 00007ffd3a72c320 R11: 0000000000000293 R12: 0000000000000000
[60619992.351777] R13: 0000000000000001 R14: ffff9bc90c217e90 R15: ffff9bc90e254500
[60619992.351809] FS:  00007f860e2a2740(0000) GS:ffff9bc9ef2c0000(0000) knlGS:0000000000000000
[60619992.351873] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[60619992.351931] CR2: 0000000000000000 CR3: 000000035ab22000 CR4: 00000000003606e0
[60619992.352018] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[60619992.352080] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[60619992.352138] Call Trace:
[60619992.352200]  [<ffffffffa5abea07>] prepare_to_wait+0x27/0x90
[60619992.352266]  [<ffffffffc044043d>] ptap_read+0x12d/0x1f0 [ptapA04_]
[60619992.352327]  [<ffffffffa5abef10>] ? wake_up_atomic_t+0x30/0x30
[60619992.352388]  [<ffffffffa5c1efef>] vfs_read+0x9f/0x170
[60619992.352445]  [<ffffffffa5c1febf>] SyS_read+0x7f/0xf0
[60619992.352503]  [<ffffffffa612579b>] system_call_fastpath+0x22/0x27
[60619992.352559] Code: 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 53 9c 58 0f 1f 44 00 00 48 89 c3 fa 66 0f 1f 44 00 00 31 c0 ba 01 00 00 00 <f0> 0f b1 17 85 c0 75 06 48 89 d8 5b 5d c3 89 c6 e8 7d 24 ff ff 
[60619992.352748] RIP  [<ffffffffa611b642>] _raw_spin_lock_irqsave+0x22/0x40
[60619992.352808]  RSP <ffff9bc90c217e10>
[60619992.352857] CR2: 0000000000000000