hid-generic 0000:0000:0000.5A0B: unknown main item tag 0x0
hid-generic 0000:0000:0000.5A0B: unknown main item tag 0x0
hid-generic 0000:0000:0000.5A0B: unknown main item tag 0x0
hid-generic 0000:0000:0000.5A0B: unknown main item tag 0x0
hid-generic 0000:0000:0000.5A0B: hidraw0: <UNKNOWN> HID v0.00 Device [syz1] on syz1
INFO: task syz-executor623:2155 blocked for more than 140 seconds.
      Not tainted 4.9.135+ #19
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor623 D29064  2155   2153 0x20020004
 ffff8801ca9c17c0 0000000000000000 ffff8801cc30dd80 ffff8801d6644740
 ffff8801db621018 ffff8801ca9378c0 ffffffff82806912 ffffffff8364ba40
 ffffffff83c966f0 0000000000000000 00000000000007c1 ffff8801db6218f0
Call Trace:
 [<ffffffff82807e3f>] schedule+0x7f/0x1b0 kernel/sched/core.c:3553
 [<ffffffff828135e5>] schedule_timeout+0x735/0xe20 kernel/time/timer.c:1771
 [<ffffffff8280995f>] do_wait_for_common kernel/sched/completion.c:75 [inline]
 [<ffffffff8280995f>] __wait_for_common kernel/sched/completion.c:93 [inline]
 [<ffffffff8280995f>] wait_for_common+0x3ef/0x5d0 kernel/sched/completion.c:101
 [<ffffffff82809b58>] wait_for_completion+0x18/0x20 kernel/sched/completion.c:122
 [<ffffffff8112c8f4>] flush_work+0x3a4/0x6c0 kernel/workqueue.c:2846
 [<ffffffff8113016e>] __cancel_work_timer+0x17e/0x440 kernel/workqueue.c:2912
 [<ffffffff81130447>] cancel_work_sync+0x17/0x20 kernel/workqueue.c:2947
 [<ffffffff82120830>] uhid_dev_destroy+0x70/0xf0 drivers/hid/uhid.c:578
 [<ffffffff82120901>] uhid_char_release+0x51/0xb0 drivers/hid/uhid.c:655
 [<ffffffff81510283>] __fput+0x263/0x700 fs/file_table.c:208
 [<ffffffff815107a5>] ____fput+0x15/0x20 fs/file_table.c:244
 [<ffffffff8113d8ec>] task_work_run+0x10c/0x180 kernel/task_work.c:116
 [<ffffffff81003e49>] tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 [<ffffffff81003e49>] exit_to_usermode_loop+0x129/0x150 arch/x86/entry/common.c:162
 [<ffffffff810066fc>] prepare_exit_to_usermode arch/x86/entry/common.c:194 [inline]
 [<ffffffff810066fc>] syscall_return_slowpath arch/x86/entry/common.c:263 [inline]
 [<ffffffff810066fc>] do_syscall_32_irqs_on arch/x86/entry/common.c:334 [inline]
 [<ffffffff810066fc>] do_fast_syscall_32+0x6dc/0xa10 arch/x86/entry/common.c:390
 [<ffffffff828180e0>] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137

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/1893:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<ffffffff8156cc6c>] __fdget_pos+0xac/0xd0 fs/file.c:781
2 locks held by getty/2020:
 #0:  (&tty->ldisc_sem){++++++}, at: [<ffffffff82814c62>] ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:367
 #1:  (&ldata->atomic_read_lock){+.+.+.}, at: [<ffffffff81d36fc2>] n_tty_read+0x202/0x16e0 drivers/tty/n_tty.c:2142
1 lock held by init/5624:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2b7f6>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2b7f6>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/5625:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2b7f6>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2b7f6>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/5626:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2b7f6>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2b7f6>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/5627:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2b7f6>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2b7f6>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/5628:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2b7f6>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2b7f6>] tty_open+0x476/0xdf0 drivers/tty/tty_io.c:2130
1 lock held by init/6006:
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2b7f6>] tty_open_by_driver drivers/tty/tty_io.c:2052 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<ffffffff81d2b7f6>] 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+ #19
 ffff8801d9907d08 ffffffff81b42b89 0000000000000000 0000000000000001
 0000000000000001 0000000000000001 ffffffff81098330 ffff8801d9907d40
 ffffffff81b4dc99 0000000000000001 0000000000000000 0000000000000003
Call Trace:
 [<ffffffff81b42b89>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81b42b89>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff81b4dc99>] nmi_cpu_backtrace.cold.0+0x48/0x87 lib/nmi_backtrace.c:99
 [<ffffffff81b4dc2c>] 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
 [<ffffffff82816d5c>] 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: 351 Comm: kworker/0:2 Not tainted 4.9.135+ #19
Workqueue: events uhid_device_add_worker
c
task: ffff8801d6644740 task.stack: ffff8801d53a8000
RIP: 0010:[<ffffffff81b70516>] 
c [<ffffffff81b70516>] delay_tsc+0x66/0xc0 arch/x86/lib/delay.c:65
RSP: 0018:ffff8801d53aef90  EFLAGS: 00000097
RAX: 0000000000000021 RBX: 00000219b98b8854 RCX: 000000000000431c
RDX: 0000021900000000 RSI: ffffffff81ba7a0b RDI: 0000000000000001
RBP: ffff8801d53aefb0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 00000219b98b8833
R13: 00000000000008fd R14: 0000000000000000 R15: fffffbfff096bb6d
FS:  0000000000000000(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000080d6ba0 CR3: 00000001d1a42000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Stack:
 ffffffff84b5db20
c 0000000000002709
c 0000000000000020
c fffffbfff096bbab
c
 ffff8801d53aefc0
c ffffffff81b703f0
c ffff8801d53aefd0
c ffffffff81b7042a
c
 ffff8801d53af020
c ffffffff81d6456f
c ffffffff81b6ca78
c ffffffff84b5db68
c
Call Trace:
 [<ffffffff81b703f0>] __delay+0x10/0x20 arch/x86/lib/delay.c:160
 [<ffffffff81b7042a>] __const_udelay+0x2a/0x30 arch/x86/lib/delay.c:174
 [<ffffffff81d6456f>] wait_for_xmitr+0x6f/0x1e0 drivers/tty/serial/8250/8250_port.c:2005
 [<ffffffff81d646ff>] serial8250_console_putchar+0x1f/0x60 drivers/tty/serial/8250/8250_port.c:3103
 [<ffffffff81d4cb19>] uart_console_write+0x59/0xf0 drivers/tty/serial/serial_core.c:1866
 [<ffffffff81d6f918>] serial8250_console_write+0x528/0x820 drivers/tty/serial/8250/8250_port.c:3169
 [<ffffffff81d5d32f>] univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:594
 [<ffffffff8122337d>] call_console_drivers.isra.0.constprop.15+0x1ad/0x360 kernel/printk/printk.c:1589
 [<ffffffff812260af>] console_unlock+0x47f/0xb50 kernel/printk/printk.c:2449
 [<ffffffff81226bc8>] vprintk_emit+0x448/0x790 kernel/printk/printk.c:1903
 [<ffffffff81d9d651>] dev_vprintk_emit+0x211/0x650 drivers/base/core.c:2207
 [<ffffffff81d9db3e>] dev_printk_emit+0xae/0xe0 drivers/base/core.c:2218
 [<ffffffff81d9ddf3>] __dev_printk+0x103/0x270 drivers/base/core.c:2230
 [<ffffffff81d9e478>] dev_err+0xd8/0x110 drivers/base/core.c:2273
 [<ffffffff8210248d>] hid_parser_main+0x59d/0x980 drivers/hid/hid-core.c:555
 [<ffffffff820ff7be>] hid_open_report+0x38e/0x6f0 drivers/hid/hid-core.c:1010
 [<ffffffff82103c4d>] hid_device_probe+0x25d/0x4e0 drivers/hid/hid-core.c:2240
 [<ffffffff81da96b7>] really_probe drivers/base/dd.c:367 [inline]
 [<ffffffff81da96b7>] driver_probe_device+0x217/0x660 drivers/base/dd.c:507
 [<ffffffff81da9ed5>] __device_attach_driver+0x205/0x270 drivers/base/dd.c:602
 [<ffffffff81da3492>] bus_for_each_drv+0x162/0x1e0 drivers/base/bus.c:463
 [<ffffffff81da92b1>] __device_attach+0x211/0x300 drivers/base/dd.c:659
 [<ffffffff81da9fda>] device_initial_probe+0x1a/0x20 drivers/base/dd.c:706
 [<ffffffff81da6e29>] bus_probe_device+0x1e9/0x290 drivers/base/bus.c:557
 [<ffffffff81da01a1>] device_add+0x861/0x1520 drivers/base/core.c:1140
 [<ffffffff82107cda>] hid_add_device+0x31a/0x940 drivers/hid/hid-core.c:2716
 [<ffffffff821209a8>] uhid_device_add_worker+0x48/0x160 drivers/hid/uhid.c:66
 [<ffffffff81130d61>] process_one_work+0x831/0x1530 kernel/workqueue.c:2092
 [<ffffffff81131b36>] worker_thread+0xd6/0x1140 kernel/workqueue.c:2226
 [<ffffffff811428dd>] kthread+0x26d/0x300 kernel/kthread.c:211
 [<ffffffff82816d5c>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:373
Code: 
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c<e8> 
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c