IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready
qtaguid: iface_stat: create6(lo): no inet dev
INFO: task kworker/0:5:17803 blocked for more than 140 seconds.
      Not tainted 4.9.125+ #37
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kworker/0:5     D29512 17803      2 0x00000000
Workqueue: events linkwatch_event
 ffff8801b5fd5f00 0000000000000000 ffff8801b8474780 ffff88019e0617c0
 ffff8801db621018 ffff8801a4a4fae8 ffffffff8277d092 0000000000000002
 ffff8801b5fd67b0 ffffed0036bfacf5 00ff8801b5fd5f00 ffff8801db6218f0
Call Trace:
 [<ffffffff8277e5bf>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff8277ef43>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3586
 [<ffffffff82780bc6>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff82780bc6>] mutex_lock_nested+0x326/0x870 kernel/locking/mutex.c:621
 [<ffffffff822c12d7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70
 [<ffffffff822d7c4e>] linkwatch_event+0xe/0x60 net/core/link_watch.c:236
 [<ffffffff8112c511>] process_one_work+0x791/0x1470 kernel/workqueue.c:2092
 [<ffffffff8112d2c6>] worker_thread+0xd6/0x10a0 kernel/workqueue.c:2226
 [<ffffffff8113d9ad>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff8278c35c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373

Showing all locks held in the system:
2 locks held by khungtaskd/24:
 #0:  (rcu_read_lock){......}, at: [<ffffffff81309abc>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff81309abc>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff813e68fc>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/2141:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff8154c11c>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/2269:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff8278a262>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff81cdd442>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
3 locks held by kworker/1:3/6186:
 #0:  ("%s"("ipv6_addrconf")){.+.+..}, at: [<ffffffff8112c420>] process_one_work+0x6a0/0x1470 kernel/workqueue.c:2085
 #1:  ((addr_chk_work).work){+.+...}, at: [<ffffffff8112c458>] process_one_work+0x6d8/0x1470 kernel/workqueue.c:2089
 #2:  (rtnl_mutex){+.+.+.}, at: [<ffffffff822c12d7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70
3 locks held by kworker/0:5/17803:
 #0:  ("events"){.+.+.+}, at: [<ffffffff8112c420>] process_one_work+0x6a0/0x1470 kernel/workqueue.c:2085
 #1:  ((linkwatch_work).work){+.+...}, at: [<ffffffff8112c458>] process_one_work+0x6d8/0x1470 kernel/workqueue.c:2089
 #2:  (rtnl_mutex){+.+.+.}, at: [<ffffffff822c12d7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70

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

NMI backtrace for cpu 0
CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.125+ #37
 ffff8801d94a7d08 ffffffff81af0ae9 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810967d0 ffff8801d94a7d40
 ffffffff81afb849 0000000000000000 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81af0ae9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81af0ae9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81afb849>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81afb7dc>] nmi_trigger_cpumask_backtrace+0x12c/0x151 lib/nmi_backtrace.c:60
 [<ffffffff810968d4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff8130a04d>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff8130a04d>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8130a04d>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8130a04d>] watchdog+0x6ad/0xa20 kernel/hung_task.c:239
 [<ffffffff8113d9ad>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff8278c35c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9335 Comm: syz-executor4 Not tainted 4.9.125+ #37
task: ffff8801d25117c0 task.stack: ffff8801bcad8000
RIP: 0010:[<ffffffff8130946a>] 
c [<ffffffff8130946a>] check_kcov_mode kernel/kcov.c:66 [inline]
RIP: 0010:[<ffffffff8130946a>] 
c [<ffffffff8130946a>] __sanitizer_cov_trace_pc+0x1a/0x50 kernel/kcov.c:100
RSP: 0018:ffff8801bcadfca8  EFLAGS: 00000246
RAX: ffff8801d25117c0 RBX: 0000000000008fe4 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8130c105 RDI: ffff8801ba9c5f98
RBP: ffff8801bcadfca8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000050000
R13: 0000000000058fe4 R14: dffffc0000000000 R15: ffff8801bcadfe48
FS:  00007f253b4a1700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000013773e0 CR3: 00000001c66e4000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801bcadfdc0
c ffffffff8130c478
c 0000000000000000
c 0000000000000000
c
 ffff8801d2512068
c ffff8801d2512068
c ffff8801d25117c0
c ffffffff8278b907
c
 000000ca00000000
c 1ffff1003795bf9f
c 0000000041b58ab3
c ffffffff82c2d9e1
c
Call Trace:
 [<ffffffff8130c478>] __seccomp_filter+0x4e8/0xc80 kernel/seccomp.c:596
 [<ffffffff8130e5d6>] __secure_computing+0xa6/0x290 kernel/seccomp.c:692
 [<ffffffff81004940>] syscall_trace_enter+0x550/0xd20 arch/x86/entry/common.c:117
 [<ffffffff8100566c>] do_syscall_64+0x2bc/0x480 arch/x86/entry/common.c:273
 [<ffffffff8278c193>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
cf9 
cfe 
cff 
cff 
c66 
c2e 
c0f 
c1f 
c84 
c00 
c00 
c00 
c00 
c00 
c0f 
c1f 
c00 
c55 
c48 
c89 
ce5 
c65 
c48 
c8b 
c04 
c25 
c00 
c7e 
c01 
c00 
c65 
c8b 
c15 
c2c 
ce9 
cd0 
c7e 
c81 
ce2 
c00 
c01 
c1f 
c00 
c<48> 
c8b 
c75 
c08 
c75 
c2b 
c8b 
c90 
c38 
c12 
c00 
c00 
c83 
cfa 
c02 
c75 
c20 
c48 
c8b 
c88 
c40 
c