==================================================================
BUG: KMSAN: uninit-value in sched_clock_local kernel/sched/clock.c:284 [inline]
BUG: KMSAN: uninit-value in sched_clock_cpu+0x181/0x9c0 kernel/sched/clock.c:374
CPU: 0 PID: 8807 Comm: blkid Not tainted 4.16.0+ #87
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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
 sched_clock_local kernel/sched/clock.c:284 [inline]
 sched_clock_cpu+0x181/0x9c0 kernel/sched/clock.c:374
 update_rq_clock kernel/sched/core.c:229 [inline]
 ttwu_queue kernel/sched/core.c:1867 [inline]
 try_to_wake_up+0x1013/0x20a0 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
 </IRQ>
RIP: 0010:kmsan_set_origin_inline+0x4a/0x120 mm/kmsan/kmsan_instr.c:588
RSP: 0018:ffff8801482ffbf8 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff12
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffff8801482ffc70
RDX: 00000000b5c00073 RSI: 0000000000000001 RDI: ffff8801482ffd38
RBP: ffff8801482ffc20 R08: 0000000001080020 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 00000000b5c00073 R14: ffff8801482ffd38 R15: 0000000000000001
 __msan_poison_alloca+0x15c/0x1d0 mm/kmsan/kmsan_instr.c:654
 do_exit+0xbc/0x38d0 kernel/exit.c:765
 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
RIP: 0033:0x7f93424051e8
RSP: 002b:00007ffe60a240c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f93424051e8
RDX: 0000000000000002 RSI: 000000000000003c RDI: 0000000000000002
RBP: 00007f93426da840 R08: 00000000000000e7 R09: ffffffffffffffa8
R10: 00007f93426e0740 R11: 0000000000000246 R12: 00007f93426da840
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000

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
 __scd_stamp kernel/sched/clock.c:130 [inline]
 sched_clock_tick+0x3dc/0x410 kernel/sched/clock.c:394
 scheduler_tick+0x84/0x490 kernel/sched/core.c:3086
 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: ----oldbit.i@cpumask_test_cpu
Variable was created at:
 cpumask_test_cpu+0x3f/0xb0 include/linux/cpumask.h:331
 profile_tick+0x63/0xb0 kernel/profile.c:407
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