hid-generic 0000:0000:00FE.04D7: unknown main item tag 0x0
hid-generic 0000:0000:00FE.04D7: unknown main item tag 0x0
hid-generic 0000:0000:00FE.04D7: hidraw0: <UNKNOWN> HID v0.06 Device [syz0] on syz1
ip6_tunnel: ï xmit: Local address not yet configured!
ip6_tunnel: ï xmit: Local address not yet configured!
INFO: task init:5878 blocked for more than 140 seconds.
      Not tainted 4.9.194+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
init            D29304  5878      1 0x00000000
 0000000000000087 ffff8801d4100000 ffff8801d4c38000 ffff8801db621000
 ffff8801d4105f00 ffff8801db621018 ffff8801d4047758 ffffffff8281af8e
 ffff8801d41008c8 ffff8801d41008a0 00ff8801d41008d0 ffff8801db6218f0
Call Trace:
 [<00000000159eeda0>] schedule+0x92/0x1c0 kernel/sched/core.c:3546
 [<000000003cb53aee>] schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3579
 [<00000000960933a5>] __mutex_lock_common kernel/locking/mutex.c:582 [inline]
 [<00000000960933a5>] mutex_lock_nested+0x38d/0x920 kernel/locking/mutex.c:621
 [<000000009e38d7cc>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
 [<000000009e38d7cc>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140
 [<000000006c69e077>] chrdev_open+0x230/0x630 fs/char_dev.c:398
 [<0000000019963354>] do_dentry_open+0x422/0xd20 fs/open.c:791
 [<00000000ee99556b>] vfs_open+0x105/0x230 fs/open.c:904
 [<000000008f89daf8>] do_last fs/namei.c:3541 [inline]
 [<000000008f89daf8>] path_openat+0xbf5/0x2f60 fs/namei.c:3665
 [<0000000007764f0e>] do_filp_open+0x1a1/0x280 fs/namei.c:3699
 [<00000000db646902>] do_sys_open+0x2f0/0x610 fs/open.c:1097
 [<0000000047ff0332>] SYSC_open fs/open.c:1115 [inline]
 [<0000000047ff0332>] SyS_open+0x2d/0x40 fs/open.c:1110
 [<00000000ea659902>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<00000000386bbbdc>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb

Showing all locks held in the system:
2 locks held by khungtaskd/24:
 #0:  (rcu_read_lock){......}, at: [<000000002e59c0b9>] check_hung_uninterruptible_tasks kernel/hung_task.c:169 [inline]
 #0:  (rcu_read_lock){......}, at: [<000000002e59c0b9>] watchdog+0x14b/0xaf0 kernel/hung_task.c:263
 #1:  (tasklist_lock){.+.+..}, at: [<00000000387cc95d>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4336
1 lock held by rsyslogd/1894:
 #0:  (&f->f_pos_lock){+.+.+.}, at: [<00000000cbacafe5>] __fdget_pos+0xa8/0xd0 fs/file.c:782
2 locks held by getty/2021:
 #0:  (&tty->ldisc_sem){++++++}, at: [<000000009bd3387b>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
 #1:  (&ldata->atomic_read_lock){+.+...}, at: [<0000000058b9b25c>] n_tty_read+0x1fe/0x1820 drivers/tty/n_tty.c:2156
1 lock held by init/5878:
 #0:  (tty_mutex){+.+.+.}, at: [<000000009e38d7cc>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<000000009e38d7cc>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140
1 lock held by init/5879:
 #0:  (tty_mutex){+.+.+.}, at: [<000000009e38d7cc>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<000000009e38d7cc>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140
1 lock held by init/5880:
 #0:  (tty_mutex){+.+.+.}, at: [<000000009e38d7cc>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<000000009e38d7cc>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140
1 lock held by init/5881:
 #0:  (tty_mutex){+.+.+.}, at: [<000000009e38d7cc>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<000000009e38d7cc>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140
1 lock held by init/5882:
 #0:  (tty_mutex){+.+.+.}, at: [<000000009e38d7cc>] tty_open_by_driver drivers/tty/tty_io.c:2062 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<000000009e38d7cc>] tty_open+0x3f9/0xe10 drivers/tty/tty_io.c:2140
1 lock held by syz-executor.5/9855:
 #0:  (tty_mutex){+.+.+.}, at: [<00000000fbfd88ee>] ptmx_open drivers/tty/pty.c:753 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<00000000fbfd88ee>] ptmx_open+0xe5/0x310 drivers/tty/pty.c:720
1 lock held by syz-executor.5/9864:
 #0:  (tty_mutex){+.+.+.}, at: [<00000000fbfd88ee>] ptmx_open drivers/tty/pty.c:753 [inline]
 #0:  (tty_mutex){+.+.+.}, at: [<00000000fbfd88ee>] ptmx_open+0xe5/0x310 drivers/tty/pty.c:720

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

NMI backtrace for cpu 1
CPU: 1 PID: 24 Comm: khungtaskd Not tainted 4.9.194+ #0
 ffff8801d98d7cc8 ffffffff81b67001 0000000000000001 0000000000000000
 0000000000000001 ffffffff81099d01 dffffc0000000000 ffff8801d98d7d00
 ffffffff81b7229c 0000000000000001 0000000000000000 0000000000000001
Call Trace:
 [<0000000085edb065>] __dump_stack lib/dump_stack.c:15 [inline]
 [<0000000085edb065>] dump_stack+0xc1/0x120 lib/dump_stack.c:51
 [<00000000cc49a3c8>] nmi_cpu_backtrace.cold+0x47/0x87 lib/nmi_backtrace.c:99
 [<000000003ffa3c17>] nmi_trigger_cpumask_backtrace+0x124/0x155 lib/nmi_backtrace.c:60
 [<00000000cfcaea29>] arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:37
 [<00000000de26188f>] trigger_all_cpu_backtrace include/linux/nmi.h:58 [inline]
 [<00000000de26188f>] check_hung_task kernel/hung_task.c:126 [inline]
 [<00000000de26188f>] check_hung_uninterruptible_tasks kernel/hung_task.c:183 [inline]
 [<00000000de26188f>] watchdog+0x670/0xaf0 kernel/hung_task.c:263
 [<0000000084c9def0>] kthread+0x278/0x310 kernel/kthread.c:211
 [<00000000e8f43338>] ret_from_fork+0x5c/0x70 arch/x86/entry/entry_64.S:375
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5877 Comm: init Not tainted 4.9.194+ #0
task: 00000000a29a10c6 task.stack: 00000000fa9150b0
RIP: 0010:[<ffffffff81d86cdb>] 
c [<00000000018ab3e1>] io_serial_in+0x6b/0x90 drivers/tty/serial/8250/8250_port.c:414
RSP: 0018:ffff8801cd89f570  EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: ffffffff81d86c81 RDI: ffffffff84b68e58
RBP: ffff8801cd89f580 R08: 0000000000000001 R09: 0000000000003921
R10: ffff8801d2a15040 R11: 0000000000000001 R12: ffffffff84b68e20
R13: 0000000000000020 R14: fffffbfff096d20b R15: fffffbfff096d1cd
FS:  00007f6a4a8667a0(0000) GS:ffff8801db600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000017937a8 CR3: 00000001d616d000 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Stack:
 ffffffff84b68e20
c 0000000000002707
c ffff8801cd89f5d0
c ffffffff81d88f24
c
 ffff8801cd89f608
c ffffffff84b68e68
c ffffffff84b6905a
c ffffffff841d75ca
c
 ffffffff84b68e20
c 0000000000000032
c dffffc0000000000
c 0000000000000032
c
Call Trace:
 [<00000000bc967b12>] serial_in drivers/tty/serial/8250/8250.h:111 [inline]
 [<00000000bc967b12>] wait_for_xmitr+0x94/0x1e0 drivers/tty/serial/8250/8250_port.c:1997
 [<00000000002ab3ba>] serial8250_console_putchar+0x20/0x60 drivers/tty/serial/8250/8250_port.c:3103
 [<00000000c0a49ebf>] uart_console_write+0x56/0xe0 drivers/tty/serial/serial_core.c:1885
 [<0000000038ff6b6c>] serial8250_console_write+0x2fb/0x860 drivers/tty/serial/8250/8250_port.c:3169
 [<00000000331ea370>] univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:594
 [<000000000dbdd148>] call_console_drivers.isra.0.constprop.0+0x1ac/0x360 kernel/printk/printk.c:1594
 [<000000003c5334a5>] console_unlock+0x47c/0xb20 kernel/printk/printk.c:2454
 [<00000000da8433c2>] console_device+0x97/0xc0 kernel/printk/printk.c:2562
 [<0000000043841444>] tty_lookup_driver drivers/tty/tty_io.c:2018 [inline]
 [<0000000043841444>] tty_open_by_driver drivers/tty/tty_io.c:2063 [inline]
 [<0000000043841444>] tty_open+0x796/0xe10 drivers/tty/tty_io.c:2140
 [<000000006c69e077>] chrdev_open+0x230/0x630 fs/char_dev.c:398
 [<0000000019963354>] do_dentry_open+0x422/0xd20 fs/open.c:791
 [<00000000ee99556b>] vfs_open+0x105/0x230 fs/open.c:904
 [<000000008f89daf8>] do_last fs/namei.c:3541 [inline]
 [<000000008f89daf8>] path_openat+0xbf5/0x2f60 fs/namei.c:3665
 [<0000000007764f0e>] do_filp_open+0x1a1/0x280 fs/namei.c:3699
 [<00000000db646902>] do_sys_open+0x2f0/0x610 fs/open.c:1097
 [<0000000047ff0332>] SYSC_open fs/open.c:1115 [inline]
 [<0000000047ff0332>] SyS_open+0x2d/0x40 fs/open.c:1110
 [<00000000ea659902>] do_syscall_64+0x1ad/0x5c0 arch/x86/entry/common.c:288
 [<00000000386bbbdc>] entry_SYSCALL_64_after_swapgs+0x5d/0xdb
Code: 
c24 
cc9 
c00 
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c49 
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c17 
c41 
c03 
c5c 
c24 
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c<5b> 
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c