================================================================== BUG: KMSAN: uninit-value in accumulate_sum kernel/sched/fair.c:3146 [inline] BUG: KMSAN: uninit-value in ___update_load_sum kernel/sched/fair.c:3229 [inline] BUG: KMSAN: uninit-value in __update_load_avg_cfs_rq kernel/sched/fair.c:3308 [inline] BUG: KMSAN: uninit-value in update_cfs_rq_load_avg+0x1344/0x1aa0 kernel/sched/fair.c:3684 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.16.0+ #87 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:53 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683 accumulate_sum kernel/sched/fair.c:3146 [inline] ___update_load_sum kernel/sched/fair.c:3229 [inline] __update_load_avg_cfs_rq kernel/sched/fair.c:3308 [inline] update_cfs_rq_load_avg+0x1344/0x1aa0 kernel/sched/fair.c:3684 update_load_avg+0xde6/0x2c20 kernel/sched/fair.c:3785 enqueue_entity kernel/sched/fair.c:4033 [inline] enqueue_task_fair+0x550/0x43a0 kernel/sched/fair.c:5219 enqueue_task kernel/sched/core.c:774 [inline] activate_task kernel/sched/core.c:793 [inline] ttwu_activate kernel/sched/core.c:1664 [inline] ttwu_do_activate kernel/sched/core.c:1723 [inline] ttwu_queue kernel/sched/core.c:1868 [inline] try_to_wake_up+0x13cc/0x20a0 kernel/sched/core.c:2081 wake_up_process+0x34/0x40 kernel/sched/core.c:2154 hrtimer_wakeup+0xac/0x100 kernel/time/hrtimer.c:1598 __run_hrtimer kernel/time/hrtimer.c:1349 [inline] __hrtimer_run_queues+0xc03/0x15d0 kernel/time/hrtimer.c:1411 hrtimer_interrupt+0x426/0xaf0 kernel/time/hrtimer.c:1469 local_apic_timer_interrupt+0x66/0x230 arch/x86/kernel/apic/apic.c:1025 smp_apic_timer_interrupt+0x5a/0x90 arch/x86/kernel/apic/apic.c:1053 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857 RIP: 0010:native_safe_halt arch/x86/include/asm/irqflags.h:55 [inline] RIP: 0010:arch_safe_halt arch/x86/include/asm/irqflags.h:97 [inline] RIP: 0010:default_idle+0x1fb/0x3c0 arch/x86/kernel/process.c:354 RSP: 0018:ffffffff8aa0fd88 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff12 RAX: ffff8801fddd81a0 RBX: 0000000000000000 RCX: ffff880000000000 RDX: ffff8801fd9d81a0 RSI: aaaaaaaaaaaab000 RDI: ffffea0000000000 RBP: ffffffff8aa0fdc0 R08: 0000000001080020 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000004 R12: 0000000000000000 R13: ffffffff8aa36c00 R14: ffffffff8aa0fe24 R15: ffffffff8aa37518 arch_cpu_idle+0x20/0x30 arch/x86/kernel/process.c:345 default_idle_call kernel/sched/idle.c:98 [inline] cpuidle_idle_call kernel/sched/idle.c:156 [inline] do_idle+0x349/0x790 kernel/sched/idle.c:246 cpu_startup_entry+0x45/0x50 kernel/sched/idle.c:351 rest_init+0x1c1/0x1f0 init/main.c:438 start_kernel+0xf93/0xfb0 init/main.c:719 x86_64_start_reservations arch/x86/kernel/head64.c:378 [inline] x86_64_start_kernel+0x2fa/0x310 arch/x86/kernel/head64.c:359 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:239 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_save_stack mm/kmsan/kmsan.c:293 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:528 update_load_sub kernel/sched/fair.c:144 [inline] account_entity_dequeue kernel/sched/fair.c:2676 [inline] dequeue_entity kernel/sched/fair.c:4127 [inline] dequeue_task_fair+0x16f0/0x2ea0 kernel/sched/fair.c:5266 dequeue_task kernel/sched/core.c:785 [inline] deactivate_task+0x50d/0x780 kernel/sched/core.c:801 __schedule+0x164/0x730 kernel/sched/core.c:3396 do_task_dead+0xa4/0xd0 kernel/sched/core.c:3478 do_exit+0x340e/0x38d0 kernel/exit.c:924 do_group_exit+0x1a0/0x360 kernel/exit.c:970 SYSC_exit_group+0x21/0x30 kernel/exit.c:981 SyS_exit_group+0x25/0x30 kernel/exit.c:979 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_save_stack mm/kmsan/kmsan.c:293 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:528 update_load_set kernel/sched/fair.c:150 [inline] reweight_entity+0x126b/0x1a30 kernel/sched/fair.c:2795 update_cfs_group kernel/sched/fair.c:3006 [inline] entity_tick kernel/sched/fair.c:4324 [inline] task_tick_fair+0x5f1/0x1040 kernel/sched/fair.c:9452 scheduler_tick+0x28b/0x490 kernel/sched/core.c:3091 update_process_times+0x157/0x1a0 kernel/time/timer.c:1641 tick_sched_handle kernel/time/tick-sched.c:162 [inline] tick_sched_timer+0x33b/0x4b0 kernel/time/tick-sched.c:1194 __run_hrtimer kernel/time/hrtimer.c:1349 [inline] __hrtimer_run_queues+0xc03/0x15d0 kernel/time/hrtimer.c:1411 hrtimer_interrupt+0x426/0xaf0 kernel/time/hrtimer.c:1469 local_apic_timer_interrupt+0x66/0x230 arch/x86/kernel/apic/apic.c:1025 smp_apic_timer_interrupt+0x5a/0x90 arch/x86/kernel/apic/apic.c:1053 Local variable description: ----flags.i.i.i.i@_raw_spin_lock_irqsave Variable was created at: _raw_spin_lock_irqsave+0x45/0xf0 kernel/locking/spinlock.c:150 hrtimer_interrupt+0x101/0xaf0 kernel/time/hrtimer.c:1450 ==================================================================