INFO: task kworker/1:1:1671 blocked for more than 140 seconds.
      Not tainted 4.14.113+ #59
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/1:1     D29232  1671      2 0x80000000
Workqueue: events linkwatch_event
Call Trace:
 schedule+0x92/0x1c0 kernel/sched/core.c:3498
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893
 linkwatch_event+0xa/0x50 net/core/link_watch.c:236
 process_one_work+0x7c6/0x1510 kernel/workqueue.c:2134
 worker_thread+0x5d7/0x1080 kernel/workqueue.c:2271
 kthread+0x310/0x420 kernel/kthread.c:232
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402

Showing all locks held in the system:
1 lock held by khungtaskd/23:
 #0:  (tasklist_lock){.+.+}, at: [<000000008afc955e>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4544
2 locks held by getty/1761:
 #0:  (&tty->ldisc_sem){++++}, at: [<00000000b9f6863e>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<0000000070c0be9e>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156
3 locks held by kworker/0:2/31624:
 #0:  ("%s"("ipv6_addrconf")){+.+.}, at: [<0000000087158e6b>] process_one_work+0x6e5/0x1510 kernel/workqueue.c:2105
 #1:  ((addr_chk_work).work){+.+.}, at: [<0000000066f21dff>] process_one_work+0x71b/0x1510 kernel/workqueue.c:2109
 #2:  (rtnl_mutex){+.+.}, at: [<00000000bc99b633>] addrconf_verify_work+0xa/0x20 net/ipv6/addrconf.c:4431
3 locks held by kworker/1:1/1671:
 #0:  ("events"){+.+.}, at: [<0000000087158e6b>] process_one_work+0x6e5/0x1510 kernel/workqueue.c:2105
 #1:  ((linkwatch_work).work){+.+.}, at: [<0000000066f21dff>] process_one_work+0x71b/0x1510 kernel/workqueue.c:2109
 #2:  (rtnl_mutex){+.+.}, at: [<00000000528ef6c8>] linkwatch_event+0xa/0x50 net/core/link_watch.c:236

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.113+ #59
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x10e lib/dump_stack.c:53
 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 25088 Comm: syz-executor.1 Not tainted 4.14.113+ #59
task: 00000000926ec455 task.stack: 000000003d94ac97
RIP: 0010:unwind_next_frame+0xa88/0x17e0 arch/x86/kernel/unwind_orc.c:432
RSP: 0000:ffff88811ab3f790 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff88811ab3f918 RCX: 0000000000000000
RDX: 1ffff11023567f2d RSI: ffff88811ab3f728 RDI: ffff88811ab3f910
RBP: 1ffff11023567ef9 R08: ffffffffbe6091dc R09: ffff88811ab3f860
R10: ffff88811ab3f94d R11: 000000000001c033 R12: ffffffffbe6091d8
R13: ffff88811ab3f950 R14: ffff88811ab3f918 R15: 0000000000000001
FS:  00007f15a22b5700(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00001e62b4c01c65 CR3: 00000001a0628003 CR4: 00000000001606a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
Code: 24 20 80 3c 02 00 4c 8b 44 24 28 0f 85 d7 0a 00 00 48 8b 14 24 4c 89 73 38 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 88 0a 00 00 4c 89 d2 48 c7 43 50 00 00 00 00 48 b8 00 00