TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies.  Check SNMP counters.
==================================================================
BUG: KASAN: use-after-free in list_replace include/linux/list.h:141 [inline]
BUG: KASAN: use-after-free in list_replace_init include/linux/list.h:149 [inline]
BUG: KASAN: use-after-free in padata_parallel_worker+0x2b0/0x2e0 kernel/padata.c:76
Write of size 8 at addr ffff8880926762d8 by task kworker/0:4/7632
BUG: unable to handle kernel 

paging request
CPU: 0 PID: 7632 Comm: kworker/0:4 Not tainted 4.14.198-syzkaller #0
 at ffffffffffffffc8
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
IP: crypto_aead_encrypt include/crypto/aead.h:330 [inline]
IP: pcrypt_aead_enc+0x74/0xf0 crypto/pcrypt.c:142
Workqueue: pencrypt padata_parallel_worker
PGD 7c6d067 
P4D 7c6d067 
Call Trace:
PUD 7c6f067 PMD 0 
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x283 lib/dump_stack.c:58
 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
Oops: 0000 [#1] PREEMPT SMP KASAN
 kasan_report_error.cold+0x8a/0x194 mm/kasan/report.c:351
Modules linked in:
CPU: 1 PID: 18 Comm: kworker/1:0 Not tainted 4.14.198-syzkaller #0
 kasan_report mm/kasan/report.c:409 [inline]
 __asan_report_store8_noabort+0x68/0x70 mm/kasan/report.c:435
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: pencrypt padata_parallel_worker
 list_replace include/linux/list.h:141 [inline]
 list_replace_init include/linux/list.h:149 [inline]
 padata_parallel_worker+0x2b0/0x2e0 kernel/padata.c:76
task: ffff8880a99104c0 task.stack: ffff8880a9918000
RIP: 0010:crypto_aead_encrypt include/crypto/aead.h:330 [inline]
RIP: 0010:pcrypt_aead_enc+0x74/0xf0 crypto/pcrypt.c:142
RSP: 0018:ffff8880a991fcc0 EFLAGS: 00010246
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 1ffffffffffffff9 RSI: 0000000000000003 RDI: ffff8880580a5a10
RBP: ffff8880580a59d0 R08: ffffffff8a0a6140 R09: 0000000000000002
 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
R10: 0000000000000000 R11: ffff8880a99104c0 R12: ffff8880580a5a10
R13: ffff8880a991fd10 R14: ffff8880a991fd10 R15: 1ffff11015323f9e
 kthread+0x30d/0x420 kernel/kthread.c:232
FS:  0000000000000000(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
CR2: ffffffffffffffc8 CR3: 00000000a0be7000 CR4: 00000000001406e0

DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Allocated by task 9830:
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
Call Trace:
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x15a/0x400 mm/slab.c:3729
 kmalloc include/linux/slab.h:493 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 tls_push_record+0xfa/0x1270 net/tls/tls_sw.c:250
 padata_parallel_worker+0x202/0x2e0 kernel/padata.c:87
 tls_sw_sendmsg+0xbb0/0xfd0 net/tls/tls_sw.c:457
 inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
 SYSC_sendto net/socket.c:1763 [inline]
 SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb

 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
Freed by task 9830:
 save_stack mm/kasan/kasan.c:447 [inline]
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524
 kthread+0x30d/0x420 kernel/kthread.c:232
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xc9/0x250 mm/slab.c:3815
 tls_push_record+0xc3b/0x1270 net/tls/tls_sw.c:293
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
 tls_sw_sendmsg+0xbb0/0xfd0 net/tls/tls_sw.c:457
Code: 
 inet_sendmsg+0x11a/0x4e0 net/ipv4/af_inet.c:762
c1 
 sock_sendmsg_nosec net/socket.c:646 [inline]
 sock_sendmsg+0xb5/0x100 net/socket.c:656
ea 
 SYSC_sendto net/socket.c:1763 [inline]
 SyS_sendto+0x1c7/0x2c0 net/socket.c:1731
03 
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
80 
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
3c 

02 
The buggy address belongs to the object at ffff888092676280
 which belongs to the cache kmalloc-256 of size 256
00 
The buggy address is located 88 bytes inside of
 256-byte region [ffff888092676280, ffff888092676380)
75 
The buggy address belongs to the page:
7f 
page:ffffea0002499d80 count:1 mapcount:0 mapping:ffff888092676000 index:0x0
48 
b8 
flags: 0xfffe0000000100(slab)
00 
raw: 00fffe0000000100 ffff888092676000 0000000000000000 000000010000000c
00 
raw: ffffea00024945e0 ffffea000242d9e0 ffff88812fe507c0 0000000000000000
00 
page dumped because: kasan: bad access detected
00 

00 
Memory state around the buggy address:
fc 
 ffff888092676180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ff 
 ffff888092676200: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
df 
>ffff888092676280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
48 
                                                    ^
8b 
 ffff888092676300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
5b 
 ffff888092676380: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
38 
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48