TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
input: syz0 as /devices/virtual/input/input28
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP:           (null)
PGD 9919d067 P4D 9919d067 PUD 96c63067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
Modules linked in:
CPU: 1 PID: 30299 Comm: kworker/1:0 Not tainted 4.14.124 #18
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: pencrypt padata_serial_worker
kobject: 'loop4' (ffff8880a4aa41a0): kobject_uevent_env
task: ffff8880a9da85c0 task.stack: ffff888062fc8000
RIP: 0010:          (null)
RSP: 0018:ffff888062fcfc80 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8880a59d2200 RCX: ffff888062fcfcf0
RDX: 1ffff11014b3a442 RSI: 0000000000000000 RDI: ffff8880a59d2200
RBP: ffff888062fcfc98 R08: ffff8880a9da85c0 R09: 0000000000000002
R10: 0000000000000000 R11: ffff8880a9da85c0 R12: ffff888062fcfd10
R13: ffff8880a66ec99c R14: ffff8880a59d2258 R15: ffff8880a59d2250
FS:  0000000000000000(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000009954e000 CR4: 00000000001406e0
Call Trace:
 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:307
kobject: 'loop4' (ffff8880a4aa41a0): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop2' (ffff8880a4a34960): kobject_uevent_env
 process_one_work+0x863/0x1600 kernel/workqueue.c:2114
 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248
 kthread+0x319/0x430 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
kobject: 'loop2' (ffff8880a4a34960): fill_kobj_path: path = '/devices/virtual/block/loop2'
Code:  Bad RIP value.
kobject: 'loop4' (ffff8880a4aa41a0): kobject_uevent_env
RIP:           (null) RSP: ffff888062fcfc80
CR2: 0000000000000000
---[ end trace a9d599bf30a9ec78 ]---
kobject: 'loop4' (ffff8880a4aa41a0): fill_kobj_path: path = '/devices/virtual/block/loop4'