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BUG: KMSAN: uninit-value in post_init_entity_util_avg+0x83b/0x9a0 kernel/sched/fair.c:774
CPU: 0 PID: 4504 Comm: udevd 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
 post_init_entity_util_avg+0x83b/0x9a0 kernel/sched/fair.c:774
 wake_up_new_task+0x9d0/0x1700 kernel/sched/core.c:2471
 _do_fork+0x765/0xf00 kernel/fork.c:2113
 SYSC_clone+0xf6/0x110 kernel/fork.c:2195
 SyS_clone+0x77/0xa0 kernel/fork.c:2189
 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x3d/0xa2
RIP: 0033:0x7f805625cf46
RSP: 002b:00007ffd2f8ea2b0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007ffd2f8ea2b0 RCX: 00007f805625cf46
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 00007ffd2f8ea310 R08: 0000000000001198 R09: 0000000000001198
R10: 00007f8056b79a70 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd2f8ea2d0 R14: 0000000000000005 R15: 0000000000000005

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
 enqueue_load_avg kernel/sched/fair.c:2761 [inline]
 reweight_entity+0x135c/0x1a30 kernel/sched/fair.c:2807
 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
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