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+0x2fa/0x370 kernel/padata.c:76
Write of size 8 at addr ffff888059855718 by task kworker/0:0/3

CPU: 0 PID: 3 Comm: kworker/0:0 Not tainted 4.14.177-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: pencrypt padata_parallel_worker
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x13e/0x194 lib/dump_stack.c:58
 print_address_description.cold+0x7c/0x1e2 mm/kasan/report.c:252
 kasan_report_error mm/kasan/report.c:351 [inline]
 kasan_report mm/kasan/report.c:409 [inline]
 kasan_report.cold+0xa9/0x2ae mm/kasan/report.c:393
 list_replace include/linux/list.h:141 [inline]
 list_replace_init include/linux/list.h:149 [inline]
 padata_parallel_worker+0x2fa/0x370 kernel/padata.c:76
 process_one_work+0x813/0x1540 kernel/workqueue.c:2116
 worker_thread+0x5d1/0x1070 kernel/workqueue.c:2250
 kthread+0x30d/0x420 kernel/kthread.c:232
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404

Allocated by task 23683:
 save_stack+0x32/0xa0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_kmalloc mm/kasan/kasan.c:551 [inline]
 kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:529
 __do_kmalloc mm/slab.c:3720 [inline]
 __kmalloc+0x15b/0x7c0 mm/slab.c:3729
 kmalloc include/linux/slab.h:493 [inline]
 kzalloc include/linux/slab.h:661 [inline]
 tls_push_record+0xfa/0x11f0 net/tls/tls_sw.c:250
 tls_push_pending_closed_record net/tls/tls_main.c:205 [inline]
 tls_push_pending_closed_record+0xe2/0x120 net/tls/tls_main.c:198
 tls_complete_pending_work include/net/tls.h:159 [inline]
 tls_sk_proto_close+0x617/0x7f0 net/tls/tls_main.c:269
 inet_release+0xdf/0x1b0 net/ipv4/af_inet.c:425
 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:450
 __sock_release+0xcd/0x2b0 net/socket.c:602
 sock_close+0x15/0x20 net/socket.c:1139
 __fput+0x25f/0x790 fs/file_table.c:210
 task_work_run+0x113/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1d6/0x220 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

Freed by task 23683:
 save_stack+0x32/0xa0 mm/kasan/kasan.c:447
 set_track mm/kasan/kasan.c:459 [inline]
 kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524
 __cache_free mm/slab.c:3496 [inline]
 kfree+0xcb/0x260 mm/slab.c:3815
 tls_push_record+0xbed/0x11f0 net/tls/tls_sw.c:293
 tls_push_pending_closed_record net/tls/tls_main.c:205 [inline]
 tls_push_pending_closed_record+0xe2/0x120 net/tls/tls_main.c:198
 tls_complete_pending_work include/net/tls.h:159 [inline]
 tls_sk_proto_close+0x617/0x7f0 net/tls/tls_main.c:269
 inet_release+0xdf/0x1b0 net/ipv4/af_inet.c:425
 inet6_release+0x4c/0x70 net/ipv6/af_inet6.c:450
 __sock_release+0xcd/0x2b0 net/socket.c:602
 sock_close+0x15/0x20 net/socket.c:1139
 __fput+0x25f/0x790 fs/file_table.c:210
 task_work_run+0x113/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1d6/0x220 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7

The buggy address belongs to the object at ffff8880598556c0
 which belongs to the cache kmalloc-1024 of size 1024
The buggy address is located 88 bytes inside of
 1024-byte region [ffff8880598556c0, ffff888059855ac0)
The buggy address belongs to the page:
page:ffffea0001661500 count:1 mapcount:0 mapping:ffff888059854040 index:0x0 compound_mapcount: 0
flags: 0xfffe0000008100(slab|head)
raw: 00fffe0000008100 ffff888059854040 0000000000000000 0000000100000007
raw: ffffea0002614ba0 ffffea000166c9a0 ffff88812fe54ac0 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff888059855600: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff888059855680: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
>ffff888059855700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff888059855780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888059855800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================