================================================================== BUG: KCSAN: data-race in tick_nohz_idle_stop_tick / tick_sched_do_timer write to 0xffffffff8764e210 of 4 bytes by interrupt on cpu 0: tick_sched_do_timer+0xb4/0xd0 kernel/time/tick-sched.c:141 tick_sched_timer+0x3f/0xd0 kernel/time/tick-sched.c:1313 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x271/0x600 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x226/0x490 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1113 [inline] smp_apic_timer_interrupt+0xd8/0x270 arch/x86/kernel/apic/apic.c:1138 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 read to 0xffffffff8764e210 of 4 bytes by task 0 on cpu 1: tick_nohz_stop_tick kernel/time/tick-sched.c:780 [inline] __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:973 [inline] tick_nohz_idle_stop_tick+0x191/0x680 kernel/time/tick-sched.c:994 cpuidle_idle_call kernel/sched/idle.c:151 [inline] do_idle+0x1ad/0x290 kernel/sched/idle.c:269 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361 start_secondary+0x169/0x1b0 arch/x86/kernel/smpboot.c:268 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ================================================================== Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.7.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x11d/0x187 lib/dump_stack.c:118 panic+0x210/0x640 kernel/panic.c:221 kcsan_report.cold+0xc/0x1a kernel/kcsan/report.c:626 kcsan_setup_watchpoint+0x3fb/0x440 kernel/kcsan/core.c:519 tick_nohz_stop_tick kernel/time/tick-sched.c:780 [inline] __tick_nohz_idle_stop_tick kernel/time/tick-sched.c:973 [inline] tick_nohz_idle_stop_tick+0x191/0x680 kernel/time/tick-sched.c:994 cpuidle_idle_call kernel/sched/idle.c:151 [inline] do_idle+0x1ad/0x290 kernel/sched/idle.c:269 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:361 start_secondary+0x169/0x1b0 arch/x86/kernel/smpboot.c:268 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242 Kernel Offset: disabled Rebooting in 86400 seconds..