INFO: task syz-executor.0:10096 blocked for more than 140 seconds.
      Not tainted 4.4.174+ #4
audit_printk_skb: 9 callbacks suppressed
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
audit: type=1400 audit(1568031891.643:900): avc:  denied  { create } for  pid=17088 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
syz-executor.0  D ffff8800a4a9fb90 30160 10096  10095 0x00000000
 ffff8800a4a9fb90 ffffffff811ff385 0000000000000296 ffffffff8406cc08
 ffff8800a4a9fb40 0000000000000200 ffff8801db61f180 ffff8801db61f1a8
 ffff8801db61e898 ffff8800ba084740 ffff8800a5f90000 ffffed0014953001
audit: type=1400 audit(1568031891.873:901): avc:  denied  { write } for  pid=17088 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1

Call Trace:
 [<ffffffff82709b79>] schedule+0x99/0x1d0 kernel/sched/core.c:3355
 [<ffffffff82715c4b>] schedule_timeout+0x47b/0x7c0 kernel/time/timer.c:1515
 [<ffffffff8270b455>] do_wait_for_common kernel/sched/completion.c:75 [inline]
 [<ffffffff8270b455>] __wait_for_common kernel/sched/completion.c:93 [inline]
 [<ffffffff8270b455>] wait_for_common+0x2b5/0x530 kernel/sched/completion.c:101
 [<ffffffff8270b6e8>] wait_for_completion+0x18/0x20 kernel/sched/completion.c:122
 [<ffffffff81583bb1>] SYSC_io_destroy fs/aio.c:1396 [inline]
 [<ffffffff81583bb1>] SyS_io_destroy+0x2c1/0x350 fs/aio.c:1374
 [<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
audit: type=1400 audit(1568031892.253:902): avc:  denied  { read } for  pid=17088 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
audit: type=1400 audit(1568031892.353:903): avc:  denied  { create } for  pid=17088 comm="syz-executor.4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1
no locks held by syz-executor.0/10096.
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 2113 Comm: syz-executor.1 Not tainted 4.4.174+ #4
task: ffff8801d54e4740 task.stack: ffff8801c0a88000
RIP: 0010:[<ffffffff812002a2>]  [<ffffffff812002a2>] validate_chain kernel/locking/lockdep.c:2149 [inline]
RIP: 0010:[<ffffffff812002a2>]  [<ffffffff812002a2>] __lock_acquire+0xcf2/0x4f50 kernel/locking/lockdep.c:3213
RSP: 0018:ffff8801c0a8f790  EFLAGS: 00000806
RAX: dffffc0000000000 RBX: 00000001a403a04b RCX: 0000000000000001
RDX: 0000000000000004 RSI: ffff8801d54e5008 RDI: ffff8801d54e5079
RBP: ffff8801c0a8f908 R08: 0000000000000002 R09: ffff8801d54e5078
R10: ffffffff82836880 R11: 0000000000000000 R12: ffff8801d54e4740
R13: ffff8801d54e5058 R14: 0000000000000000 R15: 0000000000000000
FS:  00000000027b3940(0063) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d8ea42000 CR3: 00000001c09e0000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 0000000000000000 ffff8801c0a8f930 ffffffff811fffff
 0000000000000040 0000000000000000 ffff8801c0a8f950 0000000000000046
 ffff8801d54e5070 ffff8801d54e5000 ffff8801d54e5078 0000000000000001
audit: type=1400 audit(1568031892.623:904): avc:  denied  { create } for  pid=17122 comm="syz-executor.3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
audit: type=1400 audit(1568031892.643:905): avc:  denied  { write } for  pid=17122 comm="syz-executor.3" path="socket:[56935]" dev="sockfs" ino=56935 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
audit: type=1400 audit(1568031892.643:906): avc:  denied  { write } for  pid=17122 comm="syz-executor.3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1
Call Trace:
 [<ffffffff81205f6e>] lock_acquire+0x15e/0x450 kernel/locking/lockdep.c:3592
 [<ffffffff827186b1>] __raw_spin_trylock include/linux/spinlock_api_smp.h:92 [inline]
 [<ffffffff827186b1>] _raw_spin_trylock kernel/locking/spinlock.c:135 [inline]
 [<ffffffff827186b1>] _raw_spin_trylock+0x71/0x90 kernel/locking/spinlock.c:133
 [<ffffffff8195346b>] avc_reclaim_node security/selinux/avc.c:526 [inline]
 [<ffffffff8195346b>] avc_alloc_node security/selinux/avc.c:559 [inline]
 [<ffffffff8195346b>] avc_alloc_node+0x12b/0x3c0 security/selinux/avc.c:547
 [<ffffffff81954992>] avc_insert security/selinux/avc.c:670 [inline]
 [<ffffffff81954992>] avc_compute_av+0x182/0x610 security/selinux/avc.c:976
 [<ffffffff819566e5>] avc_has_perm_noaudit security/selinux/avc.c:1112 [inline]
 [<ffffffff819566e5>] avc_has_perm+0x355/0x3a0 security/selinux/avc.c:1146
 [<ffffffff819633a0>] task_has_perm+0x200/0x330 security/selinux/hooks.c:1525
 [<ffffffff819634f4>] selinux_task_wait+0x24/0x30 security/selinux/hooks.c:3763
 [<ffffffff8194fcc3>] security_task_wait+0x73/0xb0 security/security.c:993
 [<ffffffff810db16b>] wait_consider_task+0x28b/0x35b0 kernel/exit.c:1334
 [<ffffffff810de7e0>] do_wait_thread kernel/exit.c:1447 [inline]
 [<ffffffff810de7e0>] do_wait+0x350/0xa00 kernel/exit.c:1518
 [<ffffffff810df714>] SYSC_wait4 kernel/exit.c:1649 [inline]
 [<ffffffff810df714>] SyS_wait4+0x144/0x210 kernel/exit.c:1614
 [<ffffffff82718ba1>] entry_SYSCALL_64_fastpath+0x1e/0x9a
Code: 45 20 25 00 80 04 00 3d 00 00 04 00 0f 84 39 04 00 00 48 c7 c2 c0 8b fb 82 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 <48> c7 c0 c0 8b fb 82 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 
NMI backtrace for cpu 1
CPU: 1 PID: 20 Comm: khungtaskd Not tainted 4.4.174+ #4
task: ffff8801da6c2f80 task.stack: ffff8800001e8000
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:ffff8800001efc88  EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300
RBP: ffff8800001efcb8 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: 0000000001ede978 CR3: 00000000b934b000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000001 ffffffff82e5f2e0 ffffffff831a6ac0 fffffbfff0634c34
 000000000001b6c0 0000000000000008 ffff8800001efcd8 ffffffff81092bee
 0000000000000008 ffffffff82924260 ffff8800001efd30 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