usb 2-1: USB disconnect, device number 30
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BUG: KCSAN: data-race in exit_signals / kthread_unpark

read-write to 0xffff888022afd064 of 4 bytes by task 27072 on cpu 0:
 exit_signals+0x102/0x530 kernel/signal.c:2846
 do_exit+0x15d/0x1630 kernel/exit.c:765
 kthread+0x205/0x220 kernel/kthread.c:294
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

read to 0xffff888022afd064 of 4 bytes by task 9245 on cpu 1:
 to_kthread kernel/kthread.c:83 [inline]
 kthread_unpark+0x1f/0x140 kernel/kthread.c:511
 kthread_stop+0xa6/0x2c0 kernel/kthread.c:594
 usb_stor_release_resources drivers/usb/storage/usb.c:812 [inline]
 release_everything+0x3e/0x150 drivers/usb/storage/usb.c:879
 usb_stor_disconnect+0x117/0x120 drivers/usb/storage/usb.c:1086
 usb_unbind_interface+0x165/0x530 drivers/usb/core/driver.c:458
 __device_release_driver drivers/base/dd.c:1154 [inline]
 device_release_driver_internal+0x348/0x4c0 drivers/base/dd.c:1185
 device_release_driver+0x15/0x20 drivers/base/dd.c:1208
 bus_remove_device+0x1c6/0x210 drivers/base/bus.c:533
 device_del+0x400/0x9a0 drivers/base/core.c:3115
 usb_disable_device+0x214/0x390 drivers/usb/core/message.c:1410
 usb_disconnect+0x206/0x4b0 drivers/usb/core/hub.c:2217
 hub_port_connect drivers/usb/core/hub.c:5073 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5362 [inline]
 port_event drivers/usb/core/hub.c:5508 [inline]
 hub_event+0x13bb/0x2b60 drivers/usb/core/hub.c:5590
 process_one_work+0x3e1/0x950 kernel/workqueue.c:2272
 worker_thread+0x635/0xb90 kernel/workqueue.c:2418
 kthread+0x1fd/0x220 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 9245 Comm: kworker/1:4 Not tainted 5.10.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
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