IPv6: Can't replace route, no match found
IPv6: Can't replace route, no match found
IPv6: Can't replace route, no match found
IPv6: Can't replace route, no match found
IPv6: Can't replace route, no match found
INFO: task init:5908 blocked for more than 140 seconds.
      Not tainted 4.4.172+ #13
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init            D ffff8801d9317718 29280  5908      1 0x00000000
 ffff8801d9317718 ffff8800b89a4740 70f65a91253c57d6 ffff8800b89a4740
 0000000000000000 ffff8800b89a5000 ffff8801db71f180 ffff8801db71f1a8
 ffff8801db71e898 ffff8801d75faf80 ffff8800b89a4740 ffffed003b262001
Call Trace:
 [<ffffffff827095f9>] schedule+0x99/0x1d0 kernel/sched/core.c:3355
 [<ffffffff82709db3>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388
 [<ffffffff8270bf12>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff8270bf12>] mutex_lock_nested+0x3c2/0xb80 kernel/locking/mutex.c:621
 [<ffffffff81c8aeaa>] tty_open+0x56a/0xf50 drivers/tty/tty_io.c:2067
 [<ffffffff814a3b00>] chrdev_open+0x230/0x630 fs/char_dev.c:388
 [<ffffffff8149130f>] do_dentry_open+0x38f/0xbd0 fs/open.c:749
 [<ffffffff81494afb>] vfs_open+0x10b/0x210 fs/open.c:862
 [<ffffffff814c5a1f>] do_last fs/namei.c:3269 [inline]
 [<ffffffff814c5a1f>] path_openat+0x136f/0x4470 fs/namei.c:3406
 [<ffffffff814cc6f1>] do_filp_open+0x1a1/0x270 fs/namei.c:3440
 [<ffffffff81495428>] do_sys_open+0x2f8/0x600 fs/open.c:1038
 [<ffffffff8149575d>] SYSC_open fs/open.c:1056 [inline]
 [<ffffffff8149575d>] SyS_open+0x2d/0x40 fs/open.c:1051
 [<ffffffff82718621>] entry_SYSCALL_64_fastpath+0x1e/0x9a
1 lock held by init/5908:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81c8aeaa>] tty_open+0x56a/0xf50 drivers/tty/tty_io.c:2067
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 20 Comm: khungtaskd Not tainted 4.4.172+ #13
task: ffff8801da6f4740 task.stack: ffff8800001d0000
RIP: 0010:[<ffffffff8109b617>]  [<ffffffff8109b617>] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:62 [inline]
RIP: 0010:[<ffffffff8109b617>]  [<ffffffff8109b617>] flat_send_IPI_mask+0xf7/0x1b0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8800001d7c88  EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300
RBP: ffff8800001d7cb8 R08: 0000000000000018 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000003000000 R14: ffffffff82e5f2e0 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd6de27544 CR3: 00000001d1bcd000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000001 ffffffff82e5f2e0 ffffffff831a67c0 fffffbfff0634bd4
 000000000001b6c0 0000000000000008 ffff8800001d7cd8 ffffffff81092bee
 0000000000000008 ffffffff82924260 ffff8800001d7d30 ffffffff81ab7e92
Call Trace:
 [<ffffffff81092bee>] nmi_raise_cpu_backtrace+0x5e/0x80 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81ab7e92>] nmi_trigger_all_cpu_backtrace.cold+0xa1/0xae lib/nmi_backtrace.c:85
 [<ffffffff81092ca4>] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 [<ffffffff813b4556>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff813b4556>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff813b4556>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff813b4556>] watchdog.cold+0xd3/0xee kernel/hung_task.c:238
 [<ffffffff811340b3>] kthread+0x273/0x310 kernel/kthread.c:211
 [<ffffffff82718a45>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:537
Code: 00 c3 5f ff 80 e6 10 75 e1 41 c1 e5 18 44 89 2c 25 10 c3 5f ff 44 89 fa 09 da 80 cf 04 41 83 ff 02 0f 44 d3 89 14 25 00 c3 5f ff <41> f7 c4 00 02 00 00 75 1e 4c 89 e7 57 9d 0f 1f 44 00 00 e8 e1 
NMI backtrace for cpu 1
CPU: 1 PID: 2243 Comm: sshd Not tainted 4.4.172+ #13
task: ffff8800b4235f00 task.stack: ffff8801d1a00000
RIP: 0010:[<ffffffff81309406>]  [<ffffffff81309406>] __sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:100
RSP: 0018:ffff8801d1a076a0  EFLAGS: 00000246
RAX: ffff8800b4235f00 RBX: 1ffff1003a340ed8 RCX: 0000000000000017
RDX: 0000000000000000 RSI: ffffffff814d4c49 RDI: ffff8801d1a07708
RBP: ffff8801d1a076a0 R08: ffff88021fffd058 R09: 000000000000000c
R10: ffffed0043fffa09 R11: 00000146d93443f5 R12: 00000000000001a3
R13: 0000000000000000 R14: 000000003b9abaa7 R15: dffffc0000000000
FS:  00007feee483f7c0(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000004a21bd CR3: 00000000b4619000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801d1a07768 ffffffff814d4c49 0000000000000246 1c945aedb72af70f
 0000000041b58ab3 ffffffff82c5d3d0 ffffffff814d4b20 0000000000000000
 0000000000000578 0000000014c52c4c ffffffff81b0a7fc ffff8801d1a07738
Call Trace:
 [<ffffffff814d4c49>] get_current arch/x86/include/asm/current.h:14 [inline]
 [<ffffffff814d4c49>] __estimate_accuracy fs/select.c:59 [inline]
 [<ffffffff814d4c49>] select_estimate_accuracy+0x129/0x2f0 fs/select.c:88
 [<ffffffff814d5be0>] do_select+0xcb0/0x1410 fs/select.c:426
 [<ffffffff814d680d>] core_sys_select+0x4cd/0x800 fs/select.c:607
 [<ffffffff814d6c82>] SYSC_select fs/select.c:648 [inline]
 [<ffffffff814d6c82>] SyS_select+0x142/0x1c0 fs/select.c:630
 [<ffffffff82718621>] entry_SYSCALL_64_fastpath+0x1e/0x9a
Code: fe ff ff 66 90 55 48 89 e5 48 8b 75 08 65 48 8b 04 25 80 67 01 00 65 8b 15 18 d3 d0 7e 81 e2 00 01 1f 00 75 2b 8b 90 50 12 00 00 <83> fa 02 75 20 48 8b 88 58 12 00 00 8b 80 54 12 00 00 48 8b 11