================================================================== BUG: KCSAN: data-race in tick_nohz_stop_tick / tick_sched_timer write to 0xffffffff860d8db0 of 4 bytes by interrupt on cpu 0: tick_sched_do_timer kernel/time/tick-sched.c:193 [inline] tick_sched_timer+0x2b0/0x2d0 kernel/time/tick-sched.c:1473 __run_hrtimer+0x132/0x420 kernel/time/hrtimer.c:1685 __hrtimer_run_queues kernel/time/hrtimer.c:1749 [inline] hrtimer_interrupt+0x36e/0xa70 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1096 [inline] __sysvec_apic_timer_interrupt+0xa3/0x250 arch/x86/kernel/apic/apic.c:1113 sysvec_apic_timer_interrupt+0x88/0xb0 arch/x86/kernel/apic/apic.c:1107 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:649 copy_page+0x7/0x10 arch/x86/lib/copy_page_64.S:18 copy_user_page arch/x86/include/asm/page.h:34 [inline] copy_user_highpage include/linux/highmem.h:314 [inline] __wp_page_copy_user mm/memory.c:2863 [inline] wp_page_copy+0x1bb/0x1460 mm/memory.c:3124 do_wp_page+0x2dd/0x780 handle_pte_fault mm/memory.c:4973 [inline] __handle_mm_fault mm/memory.c:5097 [inline] handle_mm_fault+0x5ef/0xa80 mm/memory.c:5218 do_user_addr_fault+0x4a1/0x980 arch/x86/mm/fault.c:1428 handle_page_fault arch/x86/mm/fault.c:1519 [inline] exc_page_fault+0x60/0x160 arch/x86/mm/fault.c:1575 asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570 read to 0xffffffff860d8db0 of 4 bytes by task 0 on cpu 1: tick_nohz_stop_tick+0x7a/0x400 kernel/time/tick-sched.c:886 __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:1108 [inline] tick_nohz_idle_stop_tick+0x174/0x2c0 kernel/time/tick-sched.c:1129 cpuidle_idle_call kernel/sched/idle.c:232 [inline] do_idle+0x18a/0x250 kernel/sched/idle.c:303 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:400 start_secondary+0x78/0x80 arch/x86/kernel/smpboot.c:262 secondary_startup_64_no_verify+0xcf/0xdb value changed: 0xffffffff -> 0x00000000 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.1.0-rc3-syzkaller-00158-gee6050c8af96-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 ==================================================================