audit: type=1400 audit(1540602948.256:195868): avc:  denied  { net_admin } for  pid=17796 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(1540602948.256:195864): avc:  denied  { net_admin } for  pid=7697 comm="syz-executor2" 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:18610 blocked for more than 140 seconds.
      Not tainted 4.9.135+ #112
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init            D28888 18610      1 0x00000000
 ffff8801a813af80 ffff8801b7345280 ffff880190eb3180 ffff8801b06f5f00
 ffff8801db721018 ffff88018ff1f580 ffffffff827f93d2 ffff8801a813b830
 000000000000015c 0000000000000000 0000000000000000 ffff8801db7218f0
Call Trace:
 [<ffffffff827fa8ff>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff828060a5>] schedule_timeout+0x735/0xe20 kernel/time/timer.c:1771
 [<ffffffff828026a1>] __down_common kernel/locking/semaphore.c:221 [inline]
 [<ffffffff828026a1>] __down+0x191/0x2b0 kernel/locking/semaphore.c:238
 [<ffffffff811fc90e>] down+0x5e/0x80 kernel/locking/semaphore.c:61
 [<ffffffff81221eac>] console_lock+0x2c/0x80 kernel/printk/printk.c:2212
 [<ffffffff8122743c>] console_device+0x1c/0xc0 kernel/printk/printk.c:2549
 [<ffffffff81d1fae5>] tty_lookup_driver drivers/tty/tty_io.c:2008 [inline]
 [<ffffffff81d1fae5>] tty_open_by_driver drivers/tty/tty_io.c:2053 [inline]
 [<ffffffff81d1fae5>] tty_open+0x6f5/0xdf0 drivers/tty/tty_io.c:2130
 [<ffffffff81517bcd>] chrdev_open+0x22d/0x5c0 fs/char_dev.c:392
 [<ffffffff81501e2f>] do_dentry_open+0x3ef/0xc90 fs/open.c:766
 [<ffffffff8150575c>] vfs_open+0x11c/0x210 fs/open.c:879
 [<ffffffff8153c532>] do_last fs/namei.c:3410 [inline]
 [<ffffffff8153c532>] path_openat+0x542/0x2790 fs/namei.c:3534
 [<ffffffff81541607>] do_filp_open+0x197/0x270 fs/namei.c:3568
 [<ffffffff8150616d>] do_sys_open+0x30d/0x5c0 fs/open.c:1072
 [<ffffffff8150644d>] SYSC_open fs/open.c:1090 [inline]
 [<ffffffff8150644d>] SyS_open+0x2d/0x40 fs/open.c:1085
 [<ffffffff810056ef>] do_syscall_64+0x19f/0x550 arch/x86/entry/common.c:285
 [<ffffffff82809653>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Showing all locks held in the system:
2 locks held by khungtaskd/24:
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131bb4c>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131bb4c>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff813fe314>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/1899:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff8156cc6c>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/2027:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82807722>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff81d2b032>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
1 lock held by syz-executor2/9181:
 #0:  (&sig->cred_guard_mutex){+.+.+.}, at: [<ffffffff81520d63>] prepare_bprm_creds+0x53/0x110 fs/exec.c:1369
1 lock held by syz-executor0/10759:
 #0:  (&sig->cred_guard_mutex){+.+.+.}, at: [<ffffffff81520d63>] prepare_bprm_creds+0x53/0x110 fs/exec.c:1369
1 lock held by init/18610:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1f866>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1f866>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/18611:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1f866>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1f866>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/18613:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1f866>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1f866>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/18614:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1f866>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1f866>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/18615:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1f866>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1f866>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/18616:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1f866>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d1f866>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130

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

NMI backtrace for cpu 1
CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.135+ #112
 ffff8801d9907d08 ffffffff81b36bf9 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff81098330 ffff8801d9907d40
 ffffffff81b41d09 0000000000000001 0000000000000000 0000000000000004
Call Trace:
 [<ffffffff81b36bf9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b36bf9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81b41d09>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81b41c9c>] 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
 [<ffffffff8131c0dd>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff8131c0dd>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8131c0dd>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8131c0dd>] watchdog+0x6ad/0xa20 kernel/hung_task.c:239
 [<ffffffff811428dd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff8280981c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 17672 Comm: syz-executor0 Not tainted 4.9.135+ #112
task: ffff8801c5efc740 task.stack: ffff8801a8b28000
RIP: 0010:[<ffffffff81392903>] 
c [<ffffffff81392903>] __bpf_prog_run+0x53/0x54b0 kernel/bpf/core.c:470
RSP: 0000:ffff8801a8b2f940  EFLAGS: 00000282
RAX: ffffed0035165f2c RBX: dffffc0000000000 RCX: 1ffff10035165ffa
RDX: 0000000000000000 RSI: ffffc9000e3c6028 RDI: ffff8801a8b2fe48
RBP: ffff8801a8b2fca8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801a8b2fc80
R13: ffff8801a8b2fe48 R14: ffffc9000e3c6028 R15: ffff8801a8b2fe48
FS:  00007fb642f83700(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c4257a3010 CR3: 00000001a8f5e000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Stack:
 ffffffff812070c0
c 00000000c5efd038
c 1ffff10035165f2c
c ffff8801c5efcff0
c
 0000000041b58ab3
c ffffffff82e34268
c ffffffff813928b0
c ffffffff82e328d8
c
 ffffffff812070c0
c 000000000000794b
c 0000000000000000
c ffff8801c5efd018
c
Call Trace:
 [<ffffffff8131e16c>] seccomp_run_filters kernel/seccomp.c:200 [inline]
 [<ffffffff8131e16c>] __seccomp_filter+0x14c/0xc80 kernel/seccomp.c:589
 [<ffffffff81320666>] __secure_computing+0xa6/0x290 kernel/seccomp.c:692
 [<ffffffff81004940>] syscall_trace_enter+0x550/0xd20 arch/x86/entry/common.c:118
 [<ffffffff81005e0a>] do_syscall_32_irqs_on arch/x86/entry/common.c:317 [inline]
 [<ffffffff81005e0a>] do_int80_syscall_32+0x36a/0x580 arch/x86/entry/common.c:342
 [<ffffffff8280ad14>] entry_INT80_compat+0x74/0xa0 arch/x86/entry/entry_64_compat.S:371
Code: 
c00 
cfc 
cff 
cdf 
c48 
c81 
cec 
c40 
c03 
c00 
c00 
c48 
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ca8 
cfc 
cff 
cff 
c48 
c01 
cd8 
c48 
cc7 
c85 
cb8 
cfc 
cff 
cff 
cb3 
c8a 
cb5 
c41 
c48 
cc7 
c85 
cc0 
cfc 
cff 
cff 
c68 
c42 
ce3 
c82 
c<48> 
cc7 
c85 
cc8 
cfc 
cff 
cff 
cb0 
c28 
c39 
c81 
cc7 
c00 
cf1 
cf1 
cf1 
cf1 
cc7 
c40 
c04 
c00 
c