================================================================== BUG: KMSAN: uninit-value in accumulate_sum kernel/sched/fair.c:3131 [inline] BUG: KMSAN: uninit-value in ___update_load_sum kernel/sched/fair.c:3214 [inline] BUG: KMSAN: uninit-value in __update_load_avg_cfs_rq kernel/sched/fair.c:3320 [inline] BUG: KMSAN: uninit-value in update_cfs_rq_load_avg+0x1380/0x1ad0 kernel/sched/fair.c:3696 CPU: 0 PID: 4476 Comm: syz-executor0 Not tainted 4.17.0-rc5+ #101 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+0x185/0x1d0 lib/dump_stack.c:113 kmsan_report+0x149/0x260 mm/kmsan/kmsan.c:1084 __msan_warning_32+0x6e/0xc0 mm/kmsan/kmsan_instr.c:686 accumulate_sum kernel/sched/fair.c:3131 [inline] ___update_load_sum kernel/sched/fair.c:3214 [inline] __update_load_avg_cfs_rq kernel/sched/fair.c:3320 [inline] update_cfs_rq_load_avg+0x1380/0x1ad0 kernel/sched/fair.c:3696 update_load_avg+0xe5e/0x2d00 kernel/sched/fair.c:3797 dequeue_task_fair+0x29d8/0x32f0 kernel/sched/fair.c:5441 dequeue_task kernel/sched/core.c:762 [inline] deactivate_task+0x50a/0x780 kernel/sched/core.c:778 __schedule+0x164/0x730 kernel/sched/core.c:3457 schedule+0x1cc/0x2f0 kernel/sched/core.c:3551 freezable_schedule include/linux/freezer.h:172 [inline] do_nanosleep+0x2c3/0x9b0 kernel/time/hrtimer.c:1689 hrtimer_nanosleep kernel/time/hrtimer.c:1743 [inline] __do_sys_nanosleep kernel/time/hrtimer.c:1775 [inline] __se_sys_nanosleep+0x41a/0x6a0 kernel/time/hrtimer.c:1762 __x64_sys_nanosleep+0x92/0xc0 kernel/time/hrtimer.c:1762 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x481110 RSP: 002b:00007fff92708e18 EFLAGS: 00000246 ORIG_RAX: 0000000000000023 RAX: ffffffffffffffda RBX: 0000000000000a06 RCX: 0000000000481110 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fff92708e20 RBP: 00000000000d28c4 R08: 0000000000000001 R09: 0000000000a87940 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000006 R14: 0000000000001e9f R15: 00000000000d28b9 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline] kmsan_save_stack mm/kmsan/kmsan.c:294 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:685 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:529 update_load_add kernel/sched/fair.c:123 [inline] account_entity_enqueue kernel/sched/fair.c:2644 [inline] reweight_entity+0x1610/0x1a30 kernel/sched/fair.c:2794 update_cfs_group kernel/sched/fair.c:2991 [inline] entity_tick kernel/sched/fair.c:4464 [inline] task_tick_fair+0x5f8/0x1050 kernel/sched/fair.c:9893 scheduler_tick+0x288/0x480 kernel/sched/core.c:3088 update_process_times+0x157/0x1a0 kernel/time/timer.c:1641 tick_sched_handle kernel/time/tick-sched.c:164 [inline] tick_sched_timer+0x3ba/0x520 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0xc03/0x15d0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x451/0x13c0 kernel/time/hrtimer.c:1518 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 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline] kmsan_save_stack mm/kmsan/kmsan.c:294 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:685 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:529 update_load_sub kernel/sched/fair.c:129 [inline] account_entity_dequeue kernel/sched/fair.c:2661 [inline] reweight_entity+0x1456/0x1a30 kernel/sched/fair.c:2774 update_cfs_group kernel/sched/fair.c:2991 [inline] entity_tick kernel/sched/fair.c:4464 [inline] task_tick_fair+0x5f8/0x1050 kernel/sched/fair.c:9893 scheduler_tick+0x288/0x480 kernel/sched/core.c:3088 update_process_times+0x157/0x1a0 kernel/time/timer.c:1641 tick_sched_handle kernel/time/tick-sched.c:164 [inline] tick_sched_timer+0x3ba/0x520 kernel/time/tick-sched.c:1274 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0xc03/0x15d0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x451/0x13c0 kernel/time/hrtimer.c:1518 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 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:279 [inline] kmsan_save_stack mm/kmsan/kmsan.c:294 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:685 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:529 update_load_set kernel/sched/fair.c:135 [inline] reweight_entity+0x128b/0x1a30 kernel/sched/fair.c:2780 update_cfs_group kernel/sched/fair.c:2991 [inline] enqueue_task_fair+0x40b7/0x4470 kernel/sched/fair.c:5382 enqueue_task kernel/sched/core.c:751 [inline] activate_task kernel/sched/core.c:770 [inline] ttwu_activate kernel/sched/core.c:1641 [inline] ttwu_do_activate kernel/sched/core.c:1700 [inline] ttwu_queue kernel/sched/core.c:1845 [inline] try_to_wake_up+0x13c0/0x2090 kernel/sched/core.c:2058 wake_up_process+0x34/0x40 kernel/sched/core.c:2131 hrtimer_wakeup+0xac/0x100 kernel/time/hrtimer.c:1647 __run_hrtimer kernel/time/hrtimer.c:1398 [inline] __hrtimer_run_queues+0xc03/0x15d0 kernel/time/hrtimer.c:1460 hrtimer_interrupt+0x451/0x13c0 kernel/time/hrtimer.c:1518 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: ----ac@__alloc_pages_nodemask Variable was created at: __alloc_pages_nodemask+0x196/0x5dd0 mm/page_alloc.c:4355 alloc_pages_current+0x6b5/0x970 mm/mempolicy.c:2093 ==================================================================