================================================================== BUG: KCSAN: data-race in tick_nohz_next_event / tick_sched_timer write to 0xffffffff83cbf0d0 of 4 bytes by interrupt on cpu 1: tick_sched_do_timer kernel/time/tick-sched.c:191 [inline] tick_sched_timer+0x1f5/0x210 kernel/time/tick-sched.c:1366 __run_hrtimer+0x160/0x480 kernel/time/hrtimer.c:1537 __hrtimer_run_queues kernel/time/hrtimer.c:1601 [inline] hrtimer_interrupt+0x380/0xaf0 kernel/time/hrtimer.c:1663 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1089 [inline] __sysvec_apic_timer_interrupt+0x6f/0x1c0 arch/x86/kernel/apic/apic.c:1106 sysvec_apic_timer_interrupt+0x64/0x80 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:647 finish_task_switch+0xda/0x290 kernel/sched/core.c:4212 context_switch kernel/sched/core.c:4342 [inline] __schedule+0x427/0x5b0 kernel/sched/core.c:5147 schedule+0x67/0x90 kernel/sched/core.c:5226 exit_to_user_mode_loop kernel/entry/common.c:162 [inline] exit_to_user_mode_prepare+0xbb/0x190 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x20/0x40 kernel/entry/common.c:301 do_syscall_64+0x56/0x90 arch/x86/entry/common.c:57 entry_SYSCALL_64_after_hwframe+0x44/0xae read to 0xffffffff83cbf0d0 of 4 bytes by task 0 on cpu 0: tick_nohz_next_event+0x217/0x300 kernel/time/tick-sched.c:802 tick_nohz_get_sleep_length+0x121/0x280 kernel/time/tick-sched.c:1152 menu_select+0x303/0x1050 drivers/cpuidle/governors/menu.c:283 cpuidle_select+0x3d/0x50 drivers/cpuidle/cpuidle.c:322 cpuidle_idle_call kernel/sched/idle.c:232 [inline] do_idle+0x16f/0x240 kernel/sched/idle.c:306 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403 rest_init+0xc9/0xd0 init/main.c:721 arch_call_rest_init+0xa/0xb start_kernel+0x59e/0x623 init/main.c:1087 secondary_startup_64_no_verify+0xb0/0xbb Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.13.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================