audit: type=1400 audit(1539540682.679:215470): avc:  denied  { net_admin } for  pid=2092 comm="syz-executor1" capability=12  scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1
audit: type=1400 audit(1539540682.679:215471): avc:  denied  { net_admin } for  pid=2092 comm="syz-executor1" capability=12  scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1
INFO: task init:1 blocked for more than 140 seconds.
      Not tainted 4.9.133+ #104
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init            D23880     1      0 0x00000004
 ffff8801da5f8000 ffff8801a9264200 ffff8801d4888000 ffff8801a8988000
 ffff8801db621018 ffff8801da607580 ffffffff827f3792 ffff8801da5f88b0
 000000000000015c 0000000000000000 0000000000000000 ffff8801db6218f0
Call Trace:
 [<ffffffff827f4cbf>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff82800465>] schedule_timeout+0x735/0xe20 kernel/time/timer.c:1771
 [<ffffffff827fca61>] __down_common kernel/locking/semaphore.c:221 [inline]
 [<ffffffff827fca61>] __down+0x191/0x2b0 kernel/locking/semaphore.c:238
 [<ffffffff811fc8ae>] down+0x5e/0x80 kernel/locking/semaphore.c:61
 [<ffffffff81221e4c>] console_lock+0x2c/0x80 kernel/printk/printk.c:2212
 [<ffffffff812273dc>] console_device+0x1c/0xc0 kernel/printk/printk.c:2549
 [<ffffffff81d1ff25>] tty_lookup_driver drivers/tty/tty_io.c:2008 [inline]
 [<ffffffff81d1ff25>] tty_open_by_driver drivers/tty/tty_io.c:2053 [inline]
 [<ffffffff81d1ff25>] tty_open+0x6f5/0xdf0 drivers/tty/tty_io.c:2130
 [<ffffffff81517c2d>] chrdev_open+0x22d/0x5c0 fs/char_dev.c:392
 [<ffffffff81501e8f>] do_dentry_open+0x3ef/0xc90 fs/open.c:766
 [<ffffffff815057bc>] vfs_open+0x11c/0x210 fs/open.c:879
 [<ffffffff8153c592>] do_last fs/namei.c:3410 [inline]
 [<ffffffff8153c592>] path_openat+0x542/0x2790 fs/namei.c:3534
 [<ffffffff81541667>] do_filp_open+0x197/0x270 fs/namei.c:3568
 [<ffffffff815061cd>] do_sys_open+0x30d/0x5c0 fs/open.c:1072
 [<ffffffff815064ad>] SYSC_open fs/open.c:1090 [inline]
 [<ffffffff815064ad>] SyS_open+0x2d/0x40 fs/open.c:1085
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82803a13>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Showing all locks held in the system:
1 lock held by init/1:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1fca6>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1fca6>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
2 locks held by khungtaskd/24:
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131baec>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131baec>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff813fe2b4>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/1893:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff8156cccc>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/2020:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82801ae2>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff81d2b472>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
2 locks held by syz-executor3/8124:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82801ae2>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff81d2b472>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
2 locks held by syz-executor5/28653:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82801ae2>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff81d2b472>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
1 lock held by syz-executor0/320:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1b809>] tty_release+0xb79/0xe90 drivers/tty/tty_io.c:1938

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

NMI backtrace for cpu 0
CPU: 0 PID: 24 Comm: khungtaskd Not tainted 4.9.133+ #104
 ffff8801d9907d08 ffffffff81b37069 0000000000000000 0000000000000000
 0000000000000000 0000000000000001 ffffffff81098330 ffff8801d9907d40
 ffffffff81b42179 0000000000000000 0000000000000000 0000000000000004
Call Trace:
 [<ffffffff81b37069>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b37069>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81b42179>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81b4210c>] nmi_trigger_cpumask_backtrace+0x12c/0x151 lib/nmi_backtrace.c:60
 [<ffffffff81098434>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff8131c07d>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff8131c07d>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8131c07d>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8131c07d>] watchdog+0x6ad/0xa20 kernel/hung_task.c:239
 [<ffffffff811428dd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff82803bdc>] 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: 5058 Comm: syz-executor5 Not tainted 4.9.133+ #104
task: ffff8801c504af80 task.stack: ffff880164950000
RIP: 0033:[<00000000004015b4>] 
c [<00000000004015b4>] 0x4015b4
RSP: 002b:00007f20c7b10b50  EFLAGS: 00000206
RAX: 000000001809abd8 RBX: 000000000000001b RCX: 0000000000457569
RDX: 0000000000410f61 RSI: 0000000000a44bf0 RDI: 0000000000000043
RBP: 00000000004bc231 R08: 000000000000000c R09: 0000000000000000
R10: 00007f20c7b11700 R11: 0000000000000246 R12: 0000000000000000
R13: 00000000004c3023 R14: 00000000004d50d0 R15: 00000000ffffffff
FS:  00007f20c7b11700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c423187e30 CR3: 00000001d7093000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400