================================================================== BUG: KCSAN: data-race in tick_do_update_jiffies64 / tick_do_update_jiffies64 write to 0xffffffff8603f008 of 8 bytes by interrupt on cpu 1: 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:1289 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x288/0x600 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x22a/0x480 kernel/time/hrtimer.c:1509 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_once_size include/linux/compiler.h:227 [inline] arch_atomic64_read arch/x86/include/asm/atomic64_64.h:22 [inline] atomic64_read include/asm-generic/atomic-instrumented.h:925 [inline] atomic_long_read include/asm-generic/atomic-long.h:28 [inline] find_watchpoint kernel/kcsan/core.c:85 [inline] __kcsan_check_watchpoint+0xbb/0x180 kernel/kcsan/core.c:322 __tsan_write8+0x18/0x40 kernel/kcsan/kcsan.c:31 handle_pte_fault mm/memory.c:3807 [inline] __handle_mm_fault+0xae0/0x2d00 mm/memory.c:3964 handle_mm_fault+0x21b/0x520 mm/memory.c:4001 do_user_addr_fault arch/x86/mm/fault.c:1441 [inline] __do_page_fault+0x3fb/0x9e0 arch/x86/mm/fault.c:1506 do_page_fault+0x54/0x233 arch/x86/mm/fault.c:1530 page_fault+0x34/0x40 arch/x86/entry/entry_64.S:1202 read to 0xffffffff8603f008 of 8 bytes by task 0 on cpu 0: tick_do_update_jiffies64+0x2b/0x260 kernel/time/tick-sched.c:62 tick_nohz_restart_sched_tick kernel/time/tick-sched.c:830 [inline] __tick_nohz_idle_restart_tick+0x31/0x1b0 kernel/time/tick-sched.c:1137 tick_nohz_idle_exit+0x1af/0x1e0 kernel/time/tick-sched.c:1178 do_idle+0xb0/0x2c0 kernel/sched/idle.c:276 cpu_startup_entry+0x1b/0x20 kernel/sched/idle.c:354 rest_init+0xec/0xf6 init/main.c:452 arch_call_rest_init+0x17/0x37 start_kernel+0x83e/0x864 init/main.c:787 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:472 x86_64_start_kernel+0x72/0x76 arch/x86/kernel/head64.c:453 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================