INFO: task syz-executor6:5758 blocked for more than 140 seconds.
      Not tainted 4.4.154+ #96
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor6   D ffff8801d536f858 28768  5758   2363 0x00000000
 ffff8801d536f858 0000000000000000 ffff8801c7df88c8 ffffed0038fbf118
 ffff8801c7df8000 ffff8801db61f180 ffff8801db61f1a8 ffff8801db61e898
 ffff8801db61e880 ffff8800a40317c0 ffff8801c7df8000 0000000000000000
Call Trace:
 [<ffffffff82683b5a>] schedule+0x7a/0x1b0 kernel/sched/core.c:3355
 [<ffffffff826842f3>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388
 [<ffffffff82686017>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff82686017>] mutex_lock_nested+0x307/0x840 kernel/locking/mutex.c:621
 [<ffffffff81f22582>] evdev_flush+0x72/0x120 drivers/input/evdev.c:350
 [<ffffffff8146e1a7>] filp_close+0xa7/0x140 fs/open.c:1095
 [<ffffffff814cca7a>] close_files fs/file.c:405 [inline]
 [<ffffffff814cca7a>] put_files_struct+0x15a/0x270 fs/file.c:433
 [<ffffffff814cccb3>] exit_files+0x83/0xb0 fs/file.c:462
 [<ffffffff810d6516>] do_exit+0x986/0x2640 kernel/exit.c:750
 [<ffffffff810dc431>] do_group_exit+0x111/0x300 kernel/exit.c:885
 [<ffffffff810fd49c>] get_signal+0x4ec/0x14a0 kernel/signal.c:2321
 [<ffffffff8100bc65>] do_signal+0x95/0x1840 arch/x86/kernel/signal.c:712
 [<ffffffff81003eba>] exit_to_usermode_loop+0x11a/0x160 arch/x86/entry/common.c:249
 [<ffffffff810057a5>] prepare_exit_to_usermode arch/x86/entry/common.c:284 [inline]
 [<ffffffff810057a5>] syscall_return_slowpath+0x1b5/0x1f0 arch/x86/entry/common.c:349
 [<ffffffff826906ad>] int_ret_from_sys_call+0x25/0xa3
1 lock held by syz-executor6/5758:
 #0:  (&evdev->mutex){+.+.+.}, at: [<ffffffff81f22582>] evdev_flush+0x72/0x120 drivers/input/evdev.c:350
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 20 Comm: khungtaskd Not tainted 4.4.154+ #96
task: ffff8801d9e94740 task.stack: ffff8800001b8000
RIP: 0010:[<ffffffff8109a2a6>]  [<ffffffff8109a2a6>] native_apic_mem_write arch/x86/include/asm/apic.h:93 [inline]
RIP: 0010:[<ffffffff8109a2a6>]  [<ffffffff8109a2a6>] __default_send_IPI_dest_field arch/x86/include/asm/ipi.h:119 [inline]
RIP: 0010:[<ffffffff8109a2a6>]  [<ffffffff8109a2a6>] _flat_send_IPI_mask arch/x86/kernel/apic/apic_flat_64.c:61 [inline]
RIP: 0010:[<ffffffff8109a2a6>]  [<ffffffff8109a2a6>] flat_send_IPI_mask+0xf6/0x1a0 arch/x86/kernel/apic/apic_flat_64.c:69
RSP: 0018:ffff8800001bfcc8  EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000c00 RCX: 0000000000000000
RDX: 0000000000000c00 RSI: 0000000000000000 RDI: ffffffffff5fc300
RBP: ffff8800001bfcf0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000246
R13: 0000000003000000 R14: ffffffff82e5f3a0 R15: 0000000000000002
FS:  0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020846000 CR3: 00000001ceed5000 CR4: 00000000001606b0
Stack:
 ffffffff82e5f3a0 ffffffff831a3060 0000000000000007 fffffbfff06344ec
 0000000000000008 ffff8800001bfd10 ffffffff81091931 ffffffff829209a0
 0000000000000003 ffff8800001bfd68 ffffffff81a5fa92 ffffffff81391205
Call Trace:
 [<ffffffff81091931>] nmi_raise_cpu_backtrace+0x61/0x80 arch/x86/kernel/apic/hw_nmi.c:33
 [<ffffffff81a5fa92>] nmi_trigger_all_cpu_backtrace.cold.0+0x70/0xae lib/nmi_backtrace.c:85
 [<ffffffff810919d4>] arch_trigger_all_cpu_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 [<ffffffff8139abc7>] trigger_all_cpu_backtrace include/linux/nmi.h:44 [inline]
 [<ffffffff8139abc7>] check_hung_task kernel/hung_task.c:125 [inline]
 [<ffffffff8139abc7>] check_hung_uninterruptible_tasks kernel/hung_task.c:182 [inline]
 [<ffffffff8139abc7>] watchdog.cold.0+0xd3/0xee kernel/hung_task.c:238
 [<ffffffff8112ee98>] kthread+0x268/0x300 kernel/kthread.c:211
 [<ffffffff82690905>] ret_from_fork+0x55/0x80 arch/x86/entry/entry_64.S:510
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 1a 4c 89 e7 57 9d 0f 1f 44 00 00 e8 12 
NMI backtrace for cpu 1
CPU: 1 PID: 9758 Comm: syz-executor0 Not tainted 4.4.154+ #96
task: ffff8800a264df00 task.stack: ffff8801bc4b0000
RIP: 0010:[<ffffffff812f8eca>]  [<ffffffff812f8eca>] seccomp_run_filters kernel/seccomp.c:199 [inline]
RIP: 0010:[<ffffffff812f8eca>]  [<ffffffff812f8eca>] __seccomp_phase1_filter kernel/seccomp.c:606 [inline]
RIP: 0010:[<ffffffff812f8eca>]  [<ffffffff812f8eca>] seccomp_phase1+0x17a/0xbf0 kernel/seccomp.c:685
RSP: 0018:ffff8801bc4b7d48  EFLAGS: 00000246
RAX: 1ffff1003b34ebdb RBX: ffff8801d9a75ed0 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff812f8eb4 RDI: ffff8801d9a75ed8
RBP: ffff8801bc4b7e50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000058fe4
R13: 0000000000050000 R14: ffff8801bc4b7ea0 R15: dffffc0000000000
FS:  00007f9f854ff700(0000) GS:ffff8801db700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020e2f000 CR3: 00000000b11e6000 CR4: 00000000001606b0
Stack:
 1ffff10037896fd0 ffff8801bc4b7f20 ffff8801bc4b7f48 ffffffff810022a7
 0000000000000000 0000000000000000 1ffff10037896fb1 000000caa264e7e8
 0000000041b58ab3 ffffffff82c441c0 ffffffff812f8d50 0000000000000000
Call Trace:
 [<ffffffff81004a98>] syscall_trace_enter_phase1+0x2c8/0x480 arch/x86/entry/common.c:134
 [<ffffffff826905bc>] tracesys+0xd/0x44
Code: 00 00 fc ff df 41 bc 00 00 ff 7f eb 2b 41 89 d5 e8 2c ba ff ff 48 8d 7b 08 48 89 f8 48 c1 e8 03 42 80 3c 38 00 0f 85 9f 08 00 00 <48> 8b 5b 08 48 85 db 0f 84 88 01 00 00 e8 04 ba ff ff 48 8d 7b