================================================================== BUG: KCSAN: data-race in __tmigr_cpu_activate / tmigr_handle_remote write to 0xffff888237d205dc of 1 bytes by task 0 on cpu 1: __tmigr_cpu_activate+0x55/0x200 kernel/time/timer_migration.c:676 tmigr_cpu_activate+0x8a/0xc0 kernel/time/timer_migration.c:699 timer_clear_idle+0x28/0x100 kernel/time/timer.c:2380 tick_nohz_restart_sched_tick+0x22/0x110 kernel/time/tick-sched.c:1096 tick_nohz_idle_update_tick kernel/time/tick-sched.c:1427 [inline] tick_nohz_idle_exit+0xfe/0x1d0 kernel/time/tick-sched.c:1470 do_idle+0x1eb/0x230 kernel/sched/idle.c:338 cpu_startup_entry+0x25/0x30 kernel/sched/idle.c:423 start_secondary+0x96/0xa0 arch/x86/kernel/smpboot.c:314 common_startup_64+0x12c/0x137 read to 0xffff888237d205dc of 1 bytes by interrupt on cpu 0: tmigr_next_groupevt kernel/time/timer_migration.c:567 [inline] tmigr_next_expired_groupevt kernel/time/timer_migration.c:591 [inline] tmigr_handle_remote_up kernel/time/timer_migration.c:1014 [inline] __walk_groups kernel/time/timer_migration.c:533 [inline] tmigr_handle_remote+0x26e/0x940 kernel/time/timer_migration.c:1080 run_timer_softirq+0x5f/0x70 kernel/time/timer.c:2453 handle_softirqs+0xbf/0x280 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0x3a/0xc0 kernel/softirq.c:655 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline] sysvec_apic_timer_interrupt+0x73/0x80 arch/x86/kernel/apic/apic.c:1049 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 kcsan_setup_watchpoint+0x404/0x410 kernel/kcsan/core.c:705 usb_start_wait_urb+0x63/0x190 drivers/usb/core/message.c:57 usb_internal_control_msg drivers/usb/core/message.c:103 [inline] usb_control_msg+0x182/0x240 drivers/usb/core/message.c:154 get_port_status drivers/usb/core/hub.c:604 [inline] hub_ext_port_status+0xbf/0x480 drivers/usb/core/hub.c:621 usb_hub_port_status drivers/usb/core/hub.c:671 [inline] port_event drivers/usb/core/hub.c:5714 [inline] hub_event+0x538/0x2910 drivers/usb/core/hub.c:5903 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0x483/0x9a0 kernel/workqueue.c:3310 worker_thread+0x51d/0x6f0 kernel/workqueue.c:3391 kthread+0x1d1/0x210 kernel/kthread.c:389 ret_from_fork+0x4b/0x60 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 value changed: 0x00 -> 0x01 Reported by Kernel Concurrency Sanitizer on: CPU: 0 UID: 0 PID: 3394 Comm: kworker/0:3 Tainted: G W 6.12.0-syzkaller-10313-g7d4050728c83 #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: usb_hub_wq hub_event ==================================================================