BUG: unable to handle kernel NULL pointer dereference at           (null)
IP:           (null)
kobject: 'erspan0' (ffff88805bcb8ff0): kobject_add_internal: parent: 'net', set: 'devices'
PGD 554ef067 P4D 554ef067 PUD 84e03067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 7136 Comm: kworker/1:4 Not tainted 4.14.135 #31
kobject: 'erspan0' (ffff88805bcb8ff0): kobject_uevent_env
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: pencrypt padata_serial_worker
task: ffff88805d57e140 task.stack: ffff88805d588000
9pnet: Insufficient options for proto=fd
RIP: 0010:          (null)
RSP: 0018:ffff88805d58fc80 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8880a137c080 RCX: ffff88805d58fcf0
RDX: 1ffff1101426f812 RSI: 0000000000000000 RDI: ffff8880a137c080
RBP: ffff88805d58fc98 R08: ffff88805d57e140 R09: 0000000000000002
R10: 0000000000000000 R11: ffff88805d57e140 R12: ffff88805d58fd10
R13: ffff8882195235dc R14: ffff8880a137c0d8 R15: ffff8880a137c0d0
FS:  0000000000000000(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
kobject: 'erspan0' (ffff88805bcb8ff0): fill_kobj_path: path = '/devices/virtual/net/erspan0'
CR2: 0000000000000000 CR3: 0000000095f81000 CR4: 00000000001426e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kobject: 'queues' (ffff8880a1820d48): kobject_add_internal: parent: 'erspan0', set: '<NULL>'
 aead_request_complete include/crypto/internal/aead.h:75 [inline]
 pcrypt_aead_serial+0x7e/0xb0 crypto/pcrypt.c:123
 padata_serial_worker+0x261/0x400 kernel/padata.c:312
kobject: 'queues' (ffff8880a1820d48): kobject_uevent_env
 process_one_work+0x863/0x1600 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
kobject: 'queues' (ffff8880a1820d48): kobject_uevent_env: filter function caused the event to drop!
 kthread+0x319/0x430 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code: 
kobject: 'rx-0' (ffff8880a0f3ec10): kobject_add_internal: parent: 'queues', set: 'queues'
 Bad RIP value.
RIP:           (null) RSP: ffff88805d58fc80
CR2: 0000000000000000
---[ end trace 0a5e9669223fb387 ]---