TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
audit: type=1804 audit(1604725649.821:19): pid=11433 uid=0 auid=0 ses=4 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir100955879/syzkaller.VGLI1I/75/bus" dev="sda1" ino=15883 res=1
BUG: unable to handle kernel NULL pointer dereference at           (null)
IP:           (null)
PGD 0 P4D 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 23 Comm: kworker/1:1 Not tainted 4.14.204-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: pencrypt padata_serial_worker
task: ffff8880b5602600 task.stack: ffff8880b5608000
RIP: 0010:          (null)
RSP: 0018:ffff8880b560fcd0 EFLAGS: 00010296
RAX: 0000000000000000 RBX: ffff8880b4c8f050 RCX: 1ffff11016ac1fa2
RDX: 1ffff11016991e02 RSI: 0000000000000000 RDI: ffff8880b4c8f000
RBP: dffffc0000000000 R08: ffffe8ffffd27170 R09: 0000000000000002
R10: 0000000000000000 R11: ffff8880b5602600 R12: 0000000000000001
R13: ffff8880b560fd10 R14: ffff888238fc5c00 R15: ffff8880b4c8f058
FS:  0000000000000000(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000009be1e000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 padata_serial_worker+0x232/0x3e0 kernel/padata.c:307
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Code:  Bad RIP value.
RIP:           (null) RSP: ffff8880b560fcd0
CR2: 0000000000000000
---[ end trace 98f56b394d76f540 ]---