IPv6: NLM_F_REPLACE set, but no existing node found!
IPv6: NLM_F_REPLACE set, but no existing node found!
IPv6: NLM_F_REPLACE set, but no existing node found!
IPv6: NLM_F_REPLACE set, but no existing node found!
IPv6: NLM_F_REPLACE set, but no existing node found!
INFO: task init:3478 blocked for more than 120 seconds.
      Not tainted 4.9.61-ga93e312 #85
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init            D29568  3478      1 0x00000000
 ffff8801cbed9800 ffff8801cc657480 ffff8801cc656f40 ffff8801cbedb000
 ffff8801db321418 ffff8801d4fb77c8 ffffffff83898b5b 0000000000000000
 0000000000000007 00ff8801cbed9800 ffff8801db321d40 ffff8801db321d68
Call Trace:
 [<ffffffff8389a0ff>] schedule+0x7f/0x1b0 kernel/sched/core.c:3538
 [<ffffffff8389aa83>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3571
 [<ffffffff838a0092>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff838a0092>] mutex_lock_nested+0x312/0x870 kernel/locking/mutex.c:621
 [<ffffffff81ffbca7>] tty_open_by_driver drivers/tty/tty_io.c:2030 [inline]
 [<ffffffff81ffbca7>] tty_open+0x407/0xdf0 drivers/tty/tty_io.c:2108
 [<ffffffff81579eeb>] chrdev_open+0x22b/0x4c0 fs/char_dev.c:392
 [<ffffffff815650b7>] do_dentry_open+0x607/0xc60 fs/open.c:766
 [<ffffffff81568b65>] vfs_open+0x105/0x220 fs/open.c:879
 [<ffffffff8159f1cc>] do_last fs/namei.c:3408 [inline]
 [<ffffffff8159f1cc>] path_openat+0x5ac/0x2910 fs/namei.c:3531
 [<ffffffff815a4d27>] do_filp_open+0x197/0x290 fs/namei.c:3566
 [<ffffffff81569642>] do_sys_open+0x352/0x4c0 fs/open.c:1072
 [<ffffffff815697dd>] SYSC_open fs/open.c:1090 [inline]
 [<ffffffff815697dd>] SyS_open+0x2d/0x40 fs/open.c:1085
 [<ffffffff838aa305>] entry_SYSCALL_64_fastpath+0x23/0xc6

Showing all locks held in the system:
2 locks held by khungtaskd/514:
 #0:  (rcu_read_lock){......}, at: [<ffffffff81371dd5>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff81371dd5>] watchdog+0x125/0xa70 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff81237c30>] debug_show_all_locks+0x70/0x280 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/3117:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff815d148f>] __fdget_pos+0x9f/0xc0 fs/file.c:781
2 locks held by getty/3208:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff838a8522>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff82002a34>] n_tty_read+0x1f4/0x16c0 drivers/tty/n_tty.c:2133
1 lock held by syz-executor2/3368:
 #0:  (&rq->lock){-.-.-.}, at: [<ffffffff8389860f>] __schedule+0x12f/0x1ba0 kernel/sched/core.c:3437
1 lock held by init/3478:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81ffbca7>] tty_open_by_driver drivers/tty/tty_io.c:2030 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81ffbca7>] tty_open+0x407/0xdf0 drivers/tty/tty_io.c:2108
1 lock held by init/3479:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81ffbca7>] tty_open_by_driver drivers/tty/tty_io.c:2030 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81ffbca7>] tty_open+0x407/0xdf0 drivers/tty/tty_io.c:2108
1 lock held by init/3480:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81ffbca7>] tty_open_by_driver drivers/tty/tty_io.c:2030 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81ffbca7>] tty_open+0x407/0xdf0 drivers/tty/tty_io.c:2108
1 lock held by init/3481:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81ffbca7>] tty_open_by_driver drivers/tty/tty_io.c:2030 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81ffbca7>] tty_open+0x407/0xdf0 drivers/tty/tty_io.c:2108
1 lock held by init/3482:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81ffbca7>] tty_open_by_driver drivers/tty/tty_io.c:2030 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81ffbca7>] tty_open+0x407/0xdf0 drivers/tty/tty_io.c:2108

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

NMI backtrace for cpu 0
CPU: 0 PID: 514 Comm: khungtaskd Not tainted 4.9.61-ga93e312 #85
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d89afd00 ffffffff81d91589 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff810bd230 ffff8801d89afd38
 ffffffff81d9c6ad 0000000000000000 0000000000000000 ffff8801cbed9c18
Call Trace:
 [<ffffffff81d91589>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d91589>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81d9c6ad>] nmi_cpu_backtrace+0xfd/0x120 lib/nmi_backtrace.c:99
 [<ffffffff81d9c7e7>] nmi_trigger_cpumask_backtrace+0x117/0x190 lib/nmi_backtrace.c:60
 [<ffffffff810bd324>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff813723a0>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff813723a0>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff813723a0>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff813723a0>] watchdog+0x6f0/0xa70 kernel/hung_task.c:239
 [<ffffffff8119af6d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff838aa5aa>] ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:433
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 21192 Comm: syz-executor4 Not tainted 4.9.61-ga93e312 #85
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8801c72e0000 task.stack: ffff8801ccfa8000
RIP: 0010:[<ffffffff81be1cec>] 
c [<ffffffff81be1cec>] selinux_inode_permission+0x27c/0x530 security/selinux/hooks.c:3053
RSP: 0018:ffff8801ccfafa70  EFLAGS: 00000246
RAX: ffff8801ca0121d0 RBX: 0000000000000081 RCX: 1ffff1003940243e
RDX: 0000000000000007 RSI: 0000000000000000 RDI: ffff8801ca0121ec
RBP: ffff8801ccfafb18 R08: 1ffff10038e5c11a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff100399f5f52
R13: ffff8801d7a39a08 R14: 0000000000400000 R15: ffff8801ccfafaf0
FS:  0000000000b31940(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000047df30 CR3: 00000001d1fe3000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 1ffff100399f5f50
c 0000000185323928
c ffff880100000080
c ffff8801ca0121d0
c
 0000000041b58ab3
c ffffffff841a7214
c ffffffff81be1a70
c ffff8801ccfafad0
c
 ffffffff810d6db6
c ffff8801ccfafb68
c 0000000000000000
c 0000000000000000
c
Call Trace:
 [<ffffffff81bcf36f>] security_inode_permission+0xaf/0xf0 security/security.c:611
 [<ffffffff8158dd33>] __inode_permission2+0x93/0x2d0 fs/namei.c:434
 [<ffffffff8158dfcf>] inode_permission2+0x2f/0x100 fs/namei.c:484
 [<ffffffff8159d65f>] may_lookup fs/namei.c:1684 [inline]
 [<ffffffff8159d65f>] link_path_walk+0x19f/0x1220 fs/namei.c:2065
 [<ffffffff8159e89a>] path_lookupat+0x6a/0x3f0 fs/namei.c:2280
 [<ffffffff815a2de7>] filename_lookup+0x197/0x3b0 fs/namei.c:2315
 [<ffffffff815a3150>] user_path_at_empty+0x40/0x50 fs/namei.c:2576
 [<ffffffff81567a9b>] user_path_at include/linux/namei.h:55 [inline]
 [<ffffffff81567a9b>] SYSC_chdir fs/open.c:452 [inline]
 [<ffffffff81567a9b>] SyS_chdir+0x9b/0x1e0 fs/open.c:446
 [<ffffffff838aa305>] entry_SYSCALL_64_fastpath+0x23/0xc6
Code: 
c00 
c00 
c00 
c00 
cfc 
cff 
cdf 
c48 
c8d 
c78 
c20 
c48 
c89 
cf9 
c48 
cc1 
ce9 
c03 
c0f 
cb6 
c14 
c11 
c84 
cd2 
c74 
c09 
c80 
cfa 
c01 
c0f 
c8e 
c38 
c02 
c00 
c00 
c48 
c8d 
c78 
c1c 
c0f 
cb7 
c50 
c20 
c<48> 
cb9 
c00 
c00 
c00 
c00 
c00 
cfc 
cff 
cdf 
c48 
c89 
cfe 
c48 
cc1 
cee 
c03 
c0f 
cb6 
c34 
c0e 
c