usb 6-1: USB disconnect, device number 16
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BUG: KCSAN: data-race in exit_signals / kthread_unpark

write to 0xffff8880a12c1024 of 4 bytes by task 27569 on cpu 1:
 exit_signals+0x124/0x580 kernel/signal.c:2831
 do_exit+0x19f/0x16e0 kernel/exit.c:761
 kthread+0x215/0x230 kernel/kthread.c:293
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

read to 0xffff8880a12c1024 of 4 bytes by task 12567 on cpu 0:
 to_kthread kernel/kthread.c:82 [inline]
 kthread_unpark+0x1f/0x150 kernel/kthread.c:510
 kthread_stop+0xa3/0x310 kernel/kthread.c:593
 usb_stor_release_resources drivers/usb/storage/usb.c:812 [inline]
 release_everything+0x3e/0x150 drivers/usb/storage/usb.c:879
 usb_stor_disconnect+0x119/0x120 drivers/usb/storage/usb.c:1085
 usb_unbind_interface+0x175/0x530 drivers/usb/core/driver.c:436
 __device_release_driver drivers/base/dd.c:1113 [inline]
 device_release_driver_internal+0x32e/0x4b0 drivers/base/dd.c:1144
 device_release_driver+0x15/0x20 drivers/base/dd.c:1167
 bus_remove_device+0x1c6/0x210 drivers/base/bus.c:533
 device_del+0x502/0xa80 drivers/base/core.c:2857
 usb_disable_device+0x24a/0x7a0 drivers/usb/core/message.c:1245
 usb_disconnect+0x206/0x4a0 drivers/usb/core/hub.c:2217
 hub_port_connect drivers/usb/core/hub.c:5059 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5348 [inline]
 port_event drivers/usb/core/hub.c:5494 [inline]
 hub_event+0x13c9/0x2bd0 drivers/usb/core/hub.c:5576
 process_one_work+0x3e1/0x9a0 kernel/workqueue.c:2269
 worker_thread+0x665/0xbe0 kernel/workqueue.c:2415
 kthread+0x20d/0x230 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 12567 Comm: kworker/0:11 Not tainted 5.8.0-rc4-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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