usb 2-1: new high-speed USB device number 41 using dummy_hcd
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BUG: KCSAN: data-race in __mod_timer / timer_clear_idle

write to 0xffff88812c11cb24 of 1 bytes by task 0 on cpu 1:
 timer_clear_idle+0x2e/0x40 kernel/time/timer.c:1686
 tick_nohz_restart_sched_tick kernel/time/tick-sched.c:860 [inline]
 __tick_nohz_idle_restart_tick+0x20/0x190 kernel/time/tick-sched.c:1161
 tick_nohz_idle_exit+0x13c/0x290 kernel/time/tick-sched.c:1202
 do_idle+0x2c5/0x310 kernel/sched/idle.c:289
 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:372
 start_secondary+0xe3/0x110 arch/x86/kernel/smpboot.c:268
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243

read to 0xffff88812c11cb24 of 1 bytes by task 16412 on cpu 0:
 forward_timer_base kernel/time/timer.c:899 [inline]
 __mod_timer+0xa5b/0x1020 kernel/time/timer.c:1020
 mod_timer+0x1b/0x20 kernel/time/timer.c:1111
 dummy_urb_enqueue+0x3c5/0x440 drivers/usb/gadget/udc/dummy_hcd.c:1287
 usb_hcd_submit_urb+0x229/0x1370 drivers/usb/core/hcd.c:1547
 usb_submit_urb+0xb73/0xb80 drivers/usb/core/urb.c:570
 usb_start_wait_urb+0x87/0x180 drivers/usb/core/message.c:58
 usb_internal_control_msg drivers/usb/core/message.c:102 [inline]
 usb_control_msg+0x16c/0x230 drivers/usb/core/message.c:153
 hub_port_init+0x69d/0x1cb0 drivers/usb/core/hub.c:4689
 hub_port_connect drivers/usb/core/hub.c:5140 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5348 [inline]
 port_event drivers/usb/core/hub.c:5494 [inline]
 hub_event+0x1a70/0x2bd0 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: 16412 Comm: kworker/0:8 Not tainted 5.8.0-rc6-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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