INFO: task syz-executor.3:16091 blocked for more than 140 seconds.
      Not tainted 4.9.141+ #23
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.3  D29816 16091  16088 0x20020000
 ffff8801c533df00 ffff8801ce0f3700 ffff8801ce0f5280 ffff8801d1cac740
 ffff8801db621018 ffff8801c8767b80 ffffffff828075c2 ffffffff842cf948
 ffffffff83ce1880 ffff8801c533e7d8 00000000000061b2 ffff8801db6218f0
Call Trace:
 [<ffffffff82808aef>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=769 sclass=netlink_route_socket pig=24092 comm=syz-executor.5
 [<ffffffff828142d5>] schedule_timeout+0x735/0xe20 kernel/time/timer.c:1771
 [<ffffffff8280a63f>] do_wait_for_common kernel/sched/completion.c:75 [inline]
 [<ffffffff8280a63f>] __wait_for_common kernel/sched/completion.c:93 [inline]
 [<ffffffff8280a63f>] wait_for_common+0x3ef/0x5d0 kernel/sched/completion.c:101
futex_wake_op: syz-executor.5 tries to shift op by 1024; fix this program
 [<ffffffff8280a838>] wait_for_completion+0x18/0x20 kernel/sched/completion.c:122
 [<ffffffff815ff490>] SYSC_io_destroy fs/aio.c:1414 [inline]
 [<ffffffff815ff490>] SyS_io_destroy+0x2c0/0x340 fs/aio.c:1392
 [<ffffffff81006311>] do_syscall_32_irqs_on arch/x86/entry/common.c:328 [inline]
 [<ffffffff81006311>] do_fast_syscall_32+0x2f1/0xa10 arch/x86/entry/common.c:390
 [<ffffffff82818de0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

Showing all locks held in the system:
2 locks held by kworker/0:1/23:
 #0:  ("events"){.+.+.+}, at: [<ffffffff81130f0c>] process_one_work+0x73c/0x15f0 kernel/workqueue.c:2085
 #1:  ((&rew.rew_work)){+.+...}, at: [<ffffffff81130f44>] process_one_work+0x774/0x15f0 kernel/workqueue.c:2089
2 locks held by khungtaskd/24:
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131c0cc>] check_hung_uninterruptible_tasks kernel/hung_task.c:168 [inline]
 #0:  (rcu_read_lock){......}, at: [<ffffffff8131c0cc>] watchdog+0x11c/0xa20 kernel/hung_task.c:239
 #1:  (tasklist_lock){.+.+..}, at: [<ffffffff813fe63f>] debug_show_all_locks+0x79/0x218 kernel/locking/lockdep.c:4336
2 locks held by getty/2025:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82815952>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<ffffffff81d37362>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
4 locks held by kworker/u4:8/16249:
 #0:  ("%s""netns"){.+.+.+}, at: [<ffffffff81130f0c>] process_one_work+0x73c/0x15f0 kernel/workqueue.c:2085
 #1:  (net_cleanup_work){+.+.+.}, at: [<ffffffff81130f44>] process_one_work+0x774/0x15f0 kernel/workqueue.c:2089
 #2:  (net_mutex){+.+.+.}, at: [<ffffffff822e681f>] cleanup_net+0x13f/0x8b0 net/core/net_namespace.c:439
 #3:  (rcu_preempt_state.barrier_mutex){+.+...}, at: [<ffffffff8124b1fd>] _rcu_barrier+0x5d/0x340 kernel/rcu/tree.c:3637
1 lock held by syz-executor.0/24101:
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff823412d7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70
1 lock held by syz-executor.0/24105:
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff823412d7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70
2 locks held by syz-executor.3/24094:
 #0:  (rtnl_mutex){+.+.+.}, at: [<ffffffff823412d7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:70
 #1:  (rcu_preempt_state.exp_mutex){+.+...}, at: [<ffffffff8124a749>] exp_funnel_lock kernel/rcu/tree_exp.h:256 [inline]
 #1:  (rcu_preempt_state.exp_mutex){+.+...}, at: [<ffffffff8124a749>] _synchronize_rcu_expedited+0x339/0x840 kernel/rcu/tree_exp.h:569
2 locks held by syz-executor.5/24108:
 #0:  (sb_writers#4){.+.+.+}, at: [<ffffffff815012ee>] sb_start_write include/linux/fs.h:1573 [inline]
 #0:  (sb_writers#4){.+.+.+}, at: [<ffffffff815012ee>] vfs_fallocate+0x2fe/0x620 fs/open.c:328
 #1:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff8178a55b>] inode_lock include/linux/fs.h:766 [inline]
 #1:  (&sb->s_type->i_mutex_key#9){++++++}, at: [<ffffffff8178a55b>] ext4_fallocate+0x1eb/0x1e80 fs/ext4/extents.c:4974

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

NMI backtrace for cpu 1
CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.141+ #23
 ffff8801d9907d08 ffffffff81b42e79 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff810983b0 ffff8801d9907d40
 ffffffff81b4df89 0000000000000001 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81b42e79>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42e79>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81b4df89>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81b4df1c>] nmi_trigger_cpumask_backtrace+0x12c/0x151 lib/nmi_backtrace.c:60
 [<ffffffff810984b4>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<ffffffff8131c65d>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<ffffffff8131c65d>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8131c65d>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8131c65d>] watchdog+0x6ad/0xa20 kernel/hung_task.c:239
 [<ffffffff81142c3d>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff82817a5c>] 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: 2092 Comm: syz-executor.3 Not tainted 4.9.141+ #23
task: ffff8801ceac17c0 task.stack: ffff8801aba20000
RIP: 0010:[<ffffffff8131ba71>] 
c [<ffffffff8131ba71>] preempt_count arch/x86/include/asm/preempt.h:22 [inline]
RIP: 0010:[<ffffffff8131ba71>] 
c [<ffffffff8131ba71>] check_kcov_mode kernel/kcov.c:66 [inline]
RIP: 0010:[<ffffffff8131ba71>] 
c [<ffffffff8131ba71>] __sanitizer_cov_trace_pc+0x11/0x50 kernel/kcov.c:100
RSP: 0018:ffff8801aba27848  EFLAGS: 00000296
RAX: ffff8801ceac17c0 RBX: ffff8801c8e112d8 RCX: 1ffffffff05cec80
RDX: 0000000000000000 RSI: ffffffff819e980c RDI: ffffffff84235e58
RBP: ffff8801aba27848 R08: ffff8801ceac20b8 R09: d8a1064c1ba25689
R10: ffff8801ceac17c0 R11: 0000000000000001 R12: dffffc0000000000
R13: 00000000000000cf R14: 0000000000000002 R15: 00000000000000cf
FS:  0000000000000000(0000) GS:ffff8801db600000(0063) knlGS:00000000088ca900
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f5519db0 CR3: 00000001ab881000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffff8801aba27880
c ffffffff819e980c
c 1ffff10035744f18
c 0000000000000004
c
 ffff8801aba27980
c 0000000000000002
c ffff8801aba27c98
c ffff8801aba279a8
c
 ffffffff819edabe
c ffffffff819eda5e
c ffffffff81ba7d7b
c ffff8801ceac203c
c
Call Trace:
 [<ffffffff819e980c>] avc_search_node security/selinux/avc.c:582 [inline]
 [<ffffffff819e980c>] avc_lookup+0xcc/0x190 security/selinux/avc.c:610
 [<ffffffff819edabe>] avc_has_perm_noaudit security/selinux/avc.c:1110 [inline]
 [<ffffffff819edabe>] avc_has_perm+0xfe/0x3a0 security/selinux/avc.c:1146
 [<ffffffff819f7f2c>] task_has_perm+0x1fc/0x330 security/selinux/hooks.c:1615
 [<ffffffff819f8083>] selinux_task_wait+0x23/0x30 security/selinux/hooks.c:3954
 [<ffffffff819e6e73>] security_task_wait+0x73/0xb0 security/security.c:1032
 [<ffffffff810e91f1>] wait_consider_task+0x2a1/0x3620 kernel/exit.c:1377
 [<ffffffff810ec993>] do_wait_thread kernel/exit.c:1490 [inline]
 [<ffffffff810ec993>] do_wait+0x423/0x950 kernel/exit.c:1561
 [<ffffffff810eda0b>] SYSC_wait4 kernel/exit.c:1693 [inline]
 [<ffffffff810eda0b>] SyS_wait4+0x12b/0x1f0 kernel/exit.c:1658
 [<ffffffff812bf054>] C_SYSC_wait4 kernel/compat.c:543 [inline]
 [<ffffffff812bf054>] compat_SyS_wait4+0x254/0x290 kernel/compat.c:536
 [<ffffffff810c6305>] sys32_waitpid+0x25/0x30 arch/x86/ia32/sys_ia32.c:172
 [<ffffffff81006311>] do_syscall_32_irqs_on arch/x86/entry/common.c:328 [inline]
 [<ffffffff81006311>] do_fast_syscall_32+0x2f1/0xa10 arch/x86/entry/common.c:390
 [<ffffffff82818de0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137
Code: 
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c89 
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c48 
c8b 
c04 
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c00 
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c<65> 
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c38 
c12 
c00 
c00 
c
futex_wake_op: syz-executor.5 tries to shift op by 1024; fix this program