================================================================== BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 write to 0xffffffff86042008 of 8 bytes by interrupt on cpu 0: tick_do_update_jiffies64+0x105/0x260 kernel/time/tick-sched.c:73 tick_sched_do_timer+0xd4/0xe0 kernel/time/tick-sched.c:138 tick_sched_timer+0x43/0xe0 kernel/time/tick-sched.c:1292 __run_hrtimer kernel/time/hrtimer.c:1514 [inline] __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1576 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1638 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1110 [inline] smp_apic_timer_interrupt+0xdc/0x280 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830 read to 0xffffffff86042008 of 8 bytes by task 0 on cpu 1: tick_do_update_jiffies64+0x2b/0x260 kernel/time/tick-sched.c:62 tick_nohz_restart_sched_tick kernel/time/tick-sched.c:833 [inline] __tick_nohz_idle_restart_tick+0x31/0x1b0 kernel/time/tick-sched.c:1140 tick_nohz_idle_exit+0x1af/0x1e0 kernel/time/tick-sched.c:1181 do_idle+0xb1/0x280 kernel/sched/idle.c:276 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:355 start_secondary+0x208/0x260 arch/x86/kernel/smpboot.c:264 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc3+ #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 5.4.0-rc3+ #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+0xf5/0x159 lib/dump_stack.c:113 panic+0x210/0x640 kernel/panic.c:221 kcsan_report.cold+0xc/0x1b kernel/kcsan/report.c:303 __kcsan_setup_watchpoint+0x3ee/0x510 kernel/kcsan/core.c:440 __tsan_read8 kernel/kcsan/kcsan.c:31 [inline] __tsan_read8+0x2c/0x30 kernel/kcsan/kcsan.c:31 tick_do_update_jiffies64+0x2b/0x260 kernel/time/tick-sched.c:62 tick_nohz_restart_sched_tick kernel/time/tick-sched.c:833 [inline] __tick_nohz_idle_restart_tick+0x31/0x1b0 kernel/time/tick-sched.c:1140 tick_nohz_idle_exit+0x1af/0x1e0 kernel/time/tick-sched.c:1181 do_idle+0xb1/0x280 kernel/sched/idle.c:276 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:355 start_secondary+0x208/0x260 arch/x86/kernel/smpboot.c:264 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 Kernel Offset: disabled Rebooting in 86400 seconds..