syzbot

INFO: task syz-executor.4:5947 blocked for more than 143 seconds.
      Not tainted 5.15.157-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:    0 pid: 5947 ppid:  4913 flags:0x0000000d
Call trace:
 __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6376
 schedule+0x11c/0x1c8 kernel/sched/core.c:6459
 schedule_timeout+0xb8/0x344 kernel/time/timer.c:1890
 do_wait_for_common+0x214/0x388 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x4c/0x64 kernel/sched/completion.c:138
 devtmpfs_submit_req drivers/base/devtmpfs.c:110 [inline]
 devtmpfs_delete_node+0x1c8/0x2a0 drivers/base/devtmpfs.c:159
 device_del+0x2d4/0x9b4 drivers/base/core.c:3578
 cdev_device_del+0x30/0x10c fs/char_dev.c:573
 evdev_disconnect+0x50/0xc0 drivers/input/evdev.c:1406
 __input_unregister_device+0x19c/0x304 drivers/input/input.c:2208
 input_unregister_device+0xb0/0xfc drivers/input/input.c:2398
 uinput_destroy_device+0x5a4/0x79c drivers/input/misc/uinput.c:298
 uinput_release+0x44/0x60 drivers/input/misc/uinput.c:710
 __fput+0x30c/0x7f0 fs/file_table.c:280
 ____fput+0x20/0x30 fs/file_table.c:308
 task_work_run+0x130/0x1e4 kernel/task_work.c:164
 exit_task_work include/linux/task_work.h:32 [inline]
 do_exit+0x670/0x20bc kernel/exit.c:872
 do_group_exit+0x110/0x268 kernel/exit.c:994
 get_signal+0x634/0x1550 kernel/signal.c:2889
 do_signal arch/arm64/kernel/signal.c:890 [inline]
 do_notify_resume+0x3d0/0x32b8 arch/arm64/kernel/signal.c:943
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Showing all locks held in the system:
1 lock held by init/1:
 #0: ffff8000150871b8 (tomoyo_ss){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311
3 locks held by kdevtmpfs/23:
1 lock held by khungtaskd/27:
 #0: ffff800014b114e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311
1 lock held by kswapd0/213:
1 lock held by syslogd/3568:
 #0: ffff8000150871b8 (tomoyo_ss){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:311
1 lock held by dhcpcd/3634:
2 locks held by getty/3726:
 #0: ffff0000d32c2098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340
 #1: ffff80001a25e2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 drivers/tty/n_tty.c:2158
2 locks held by syz-fuzzer/3957:
2 locks held by syz-fuzzer/3962:
1 lock held by syz-fuzzer/4000:
2 locks held by syz-executor.4/4913:
 #0: ffff0000dc0c8ff0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x64/0x1060 net/bluetooth/hci_core.c:1737
 #1: ffff0000dc0c8078 (&hdev->lock){+.+.}-{3:3}, at: hci_dev_do_close+0x338/0x1060 net/bluetooth/hci_core.c:1782
1 lock held by syz-executor.4/5947:
 #0: ffff8000161ff148 (input_mutex){+.+.}-{3:3}, at: __input_unregister_device+0x10c/0x304 drivers/input/input.c:2205

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