SELinux: unrecognized netlink message: protocol=0 nlmsg_type=14392 sclass=netlink_route_socket
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=8224 sclass=netlink_route_socket
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=14392 sclass=netlink_route_socket
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=8224 sclass=netlink_route_socket
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=14392 sclass=netlink_route_socket
INFO: task init:24855 blocked for more than 140 seconds.
      Not tainted 4.4.174+ #4
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init            D ffff88013b06f718 29280 24855      1 0x00000000
 ffff88013b06f718 ffff88013b11c740 a15b600eea9df782 ffff88013b11c740
 0000000000000000 ffff88013b11d000 ffff8801db61f180 ffff8801db61f1a8
 ffff8801db61e898 ffff88005237df00 ffff88013b11c740 ffffed002760d001
Call Trace:
 [<ffffffff82709b79>] schedule+0x99/0x1d0 kernel/sched/core.c:3355
 [<ffffffff8270a333>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388
 [<ffffffff8270c492>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff8270c492>] mutex_lock_nested+0x3c2/0xb80 kernel/locking/mutex.c:621
 [<ffffffff81c8b2aa>] tty_open+0x56a/0xf50 drivers/tty/tty_io.c:2067
 [<ffffffff814a3ec0>] chrdev_open+0x230/0x630 fs/char_dev.c:388
 [<ffffffff8149154f>] do_dentry_open+0x38f/0xbd0 fs/open.c:749
 [<ffffffff81494d3b>] vfs_open+0x10b/0x210 fs/open.c:862
 [<ffffffff814c5ddf>] do_last fs/namei.c:3269 [inline]
 [<ffffffff814c5ddf>] path_openat+0x136f/0x4470 fs/namei.c:3406
 [<ffffffff814ccab1>] do_filp_open+0x1a1/0x270 fs/namei.c:3440
 [<ffffffff81495668>] do_sys_open+0x2f8/0x600 fs/open.c:1038
 [<ffffffff8149599d>] SYSC_open fs/open.c:1056 [inline]
 [<ffffffff8149599d>] SyS_open+0x2d/0x40 fs/open.c:1051
 [<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
1 lock held by init/24855:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81c8b2aa>] tty_open+0x56a/0xf50 drivers/tty/tty_io.c:2067
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 14515 Comm: blkid Not tainted 4.4.174+ #4
task: ffff880035380000 task.stack: ffff88002f418000
RIP: 0010:[<ffffffff81139f18>]  [<ffffffff81139f18>] prepare_creds+0xa8/0x2b0 kernel/cred.c:263
RSP: 0018:ffff88002f41fe40  EFLAGS: 00000206
RAX: ffffffff82e80be0 RBX: ffff880035380000 RCX: 0000000000000000
RDX: 1ffff1000a5740b2 RSI: ffff880052ba0da8 RDI: ffff880052ba0590
RBP: ffff88002f41fe58 R08: ffffed000a5740b5 R09: 0000000000000005
R10: ffffed000a5740b4 R11: ffff880052ba05a7 R12: ffff880052ba0500
R13: ffff880052ba0d00 R14: 00007faf83ef5758 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc11f81020 CR3: 0000000134eca000 CR4: 00000000001606b0
Stack:
 dffffc0000000000 00007faf83cee2e6 00000000ffffff9c ffff88002f41ff28
 ffffffff814938a5 ffffffff00000001 ffffff9c00000001 1ffff10005e83fd4
 0000000000000000 00007ffc11f81020 00007faf83cee2e6 0000000000000000
Call Trace:
 [<ffffffff814938a5>] SYSC_faccessat fs/open.c:359 [inline]
 [<ffffffff814938a5>] SyS_faccessat+0xa5/0x6d0 fs/open.c:346
 [<ffffffff81493ef1>] SYSC_access fs/open.c:426 [inline]
 [<ffffffff81493ef1>] SyS_access+0x21/0x30 fs/open.c:424
 [<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
Code: 00 00 00 00 fc ff df 41 c7 04 24 01 00 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 fd 01 00 00 49 8b 84 24 90 00 00 00 f0 ff 00 <49> 8d bc 24 80 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 
NMI backtrace for cpu 1
CPU: 1 PID: 20 Comm: khungtaskd Not tainted 4.4.174+ #4
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:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000758040 CR3: 00000000b2290000 CR4: 00000000001606b0
Stack:
 0000000000000001 ffffffff82e5f2e0 ffffffff831a6ac0 fffffbfff0634c34
 000000000001b6c0 0000000000000008 ffff8800001d7cd8 ffffffff81092bee
 0000000000000008 ffffffff82924260 ffff8800001d7d30 ffffffff81ab8252
Call Trace:
 [<ffffffff81092bee>] nmi_raise_cpu_backtrace+0x5e/0x80 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81ab8252>] 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
 [<ffffffff813b4762>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff813b4762>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff813b4762>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff813b4762>] watchdog.cold+0xd3/0xee kernel/hung_task.c:238
 [<ffffffff811342c3>] kthread+0x273/0x310 kernel/kthread.c:211
 [<ffffffff82718fc5>] 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 f1