================================================================== BUG: KCSAN: data-race in internal_add_timer / update_process_times write to 0xffff888237c376d8 of 8 bytes by interrupt on cpu 1: enqueue_timer kernel/time/timer.c:598 [inline] internal_add_timer+0x146/0x270 kernel/time/timer.c:611 add_timer_on+0x262/0x2a0 kernel/time/timer.c:1182 clocksource_watchdog+0xa74/0xac0 kernel/time/clocksource.c:478 call_timer_fn+0x2e/0x1d0 kernel/time/timer.c:1421 expire_timers+0x135/0x240 kernel/time/timer.c:1466 __run_timers+0x358/0x420 kernel/time/timer.c:1734 run_timer_softirq+0x19/0x30 kernel/time/timer.c:1747 __do_softirq+0x12c/0x26e kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x9a/0xb0 kernel/softirq.c:636 sysvec_apic_timer_interrupt+0x69/0x80 arch/x86/kernel/apic/apic.c:1100 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 menu_reflect+0x0/0x60 drivers/cpuidle/governors/menu.c:293 cpuidle_reflect+0x52/0x60 drivers/cpuidle/cpuidle.c:368 cpuidle_idle_call kernel/sched/idle.c:243 [inline] do_idle+0x1bd/0x240 kernel/sched/idle.c:306 cpu_startup_entry+0x15/0x20 kernel/sched/idle.c:403 secondary_startup_64_no_verify+0xb0/0xbb read to 0xffff888237c376d8 of 8 bytes by interrupt on cpu 0: run_local_timers kernel/time/timer.c:1761 [inline] update_process_times+0x8c/0x150 kernel/time/timer.c:1784 tick_sched_handle kernel/time/tick-sched.c:226 [inline] tick_sched_timer+0x191/0x210 kernel/time/tick-sched.c:1421 __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:638 wait_consider_task+0x48/0x19e0 kernel/exit.c:1288 do_wait_thread kernel/exit.c:1397 [inline] do_wait+0x182/0x640 kernel/exit.c:1514 kernel_wait4+0x13c/0x1a0 kernel/exit.c:1677 __do_sys_wait4 kernel/exit.c:1705 [inline] __se_sys_wait4 kernel/exit.c:1701 [inline] __x64_sys_wait4+0x7a/0x100 kernel/exit.c:1701 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae value changed: 0x000000010002d300 -> 0x000000010002d0e8 Reported by Kernel Concurrency Sanitizer on: CPU: 0 PID: 1794 Comm: syz-executor.5 Not tainted 5.14.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ==================================================================