netlink: 3 bytes leftover after parsing attributes in process `syz-executor.0'.
INFO: task syz-executor.5:14905 blocked for more than 140 seconds.
      Not tainted 4.4.174+ #17
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D ffff8800a602fc98 28984 14905   2131 0x20020004
 ffff8800a602fc98 ffff880197b497c0 ac51a129672528c9 ffff880197b497c0
 0000000000000000 ffff880197b4a000 ffff8801db61f180 ffff8801db61f1a8
 ffff8801db61e898 ffff8801d5448000 ffff880197b497c0 ffffed0014c05001
Call Trace:
 [<ffffffff82709b79>] schedule+0x99/0x1d0 kernel/sched/core.c:3355
 [<ffffffff8270a333>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3388
 [<ffffffff8270c492>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<ffffffff8270c492>] mutex_lock_nested+0x3c2/0xb80 kernel/locking/mutex.c:621
 [<ffffffff81f92912>] evdev_flush+0x72/0x120 drivers/input/evdev.c:350
 [<ffffffff81492169>] filp_close+0xa9/0x140 fs/open.c:1095
 [<ffffffff814f3ea1>] __close_fd+0x1a1/0x2b0 fs/file.c:650
 [<ffffffff81492246>] SYSC_close fs/open.c:1114 [inline]
 [<ffffffff81492246>] SyS_close+0x46/0xa0 fs/open.c:1112
 [<ffffffff8100603d>] do_syscall_32_irqs_on arch/x86/entry/common.c:330 [inline]
 [<ffffffff8100603d>] do_fast_syscall_32+0x32d/0xa90 arch/x86/entry/common.c:397
 [<ffffffff8271a350>] sysenter_flags_fixed+0xd/0x1a
1 lock held by syz-executor.5/14905:
 #0:  (&evdev->mutex){+.+.+.}, at: [<ffffffff81f92912>] evdev_flush+0x72/0x120 drivers/input/evdev.c:350
Sending NMI to all CPUs:
NMI backtrace for cpu 0
CPU: 0 PID: 6017 Comm: syz-executor.4 Not tainted 4.4.174+ #17
task: ffff8800a539c740 task.stack: ffff8801d4ea8000
RIP: 0010:[<ffffffff811f87ea>]  [<ffffffff811f87ea>] trace_hardirqs_off_caller+0x5a/0x290 kernel/locking/lockdep.c:2632
RSP: 0000:ffff8801d4eafee0  EFLAGS: 00000002
RAX: 0000000000000003 RBX: ffff8800a539c740 RCX: 1ffffffff05f7178
RDX: 0000000000000004 RSI: 00000000080ec638 RDI: 0000000000000001
RBP: ffff8801d4eafef8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8271a4bc
R13: ffff8800a539c740 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8801db600000(0063) knlGS:00000000f5555b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000203d9000 CR3: 00000000b7df9000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 0000000000000000 0000000000000000 0000000000000000 0000000000000000
 ffffffff81002190 0000000000000000 0000000000000000 0000000000000000
 0000000000000000 00000000ffffffda 00000000198c25d0 00000000f5555a88
Call Trace:
 [<ffffffff81002190>] trace_hardirqs_off_thunk+0x17/0x19
Code: 48 8b 1c 25 80 67 01 00 38 d0 7c 08 84 d2 0f 85 de 01 00 00 8b 3d e7 03 dc 01 85 ff 0f 84 6b 01 00 00 65 4c 8b 2c 25 80 67 01 00 <49> 8d bd c4 08 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 
NMI backtrace for cpu 1
CPU: 1 PID: 20 Comm: khungtaskd Not tainted 4.4.174+ #17
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: 00007f2922869000 CR3: 00000000b90ae000 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