==================================================================
BUG: KMSAN: uninit-value in sched_clock_local kernel/sched/clock.c:272 [inline]
BUG: KMSAN: uninit-value in sched_clock_cpu+0x181/0x9c0 kernel/sched/clock.c:362
CPU: 1 PID: 6674 Comm: udevd Not tainted 4.17.0+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x188/0x2a0 mm/kmsan/kmsan.c:1125
 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:620
 sched_clock_local kernel/sched/clock.c:272 [inline]
 sched_clock_cpu+0x181/0x9c0 kernel/sched/clock.c:362
 local_clock include/linux/sched/clock.h:84 [inline]
 select_idle_cpu kernel/sched/fair.c:6344 [inline]
 select_idle_sibling kernel/sched/fair.c:6403 [inline]
 select_task_rq_fair+0x5a6e/0x66b0 kernel/sched/fair.c:6614
FAULT_INJECTION: forcing a failure.
name fail_page_alloc, interval 1, probability 0, space 0, times 0
 select_task_rq kernel/sched/core.c:1551 [inline]
 try_to_wake_up+0xca9/0x2260 kernel/sched/core.c:2060
 wake_up_process+0x34/0x40 kernel/sched/core.c:2148
 hrtimer_wakeup+0xac/0x100 kernel/time/hrtimer.c:1647
 __run_hrtimer kernel/time/hrtimer.c:1398 [inline]
 __hrtimer_run_queues+0xc54/0x1630 kernel/time/hrtimer.c:1460
 hrtimer_interrupt+0x451/0x13c0 kernel/time/hrtimer.c:1518
 local_apic_timer_interrupt+0x6b/0x250 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:866
 </IRQ>
RIP: 0010:__msan_poison_alloca+0x150/0x1d0 mm/kmsan/kmsan_instr.c:590
RSP: 0018:ffff88013a6afad0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 00000000c980000d RBX: 00000000c980000d RCX: ffff88013a6afb10
RDX: 0000000000000004 RSI: 0000000000000004 RDI: ffff88013a6afb80
RBP: ffff88013a6afb68 R08: 0000000001080020 R09: 0000000000000002
R10: 0000000000000000 R11: ffffffff81223ec0 R12: 0000000000000000
R13: ffffffff8ac80ca0 R14: 0000000000000246 R15: ffff8801c71257c0
 _raw_spin_lock_irqsave+0x45/0xf0 kernel/locking/spinlock.c:150
 add_wait_queue+0xc1/0x390 kernel/sched/wait.c:22
 do_wait+0x35e/0xbd0 kernel/exit.c:1507
 kernel_wait4+0x337/0x4b0 kernel/exit.c:1667
 __do_sys_wait4 kernel/exit.c:1679 [inline]
 __se_sys_wait4 kernel/exit.c:1675 [inline]
 __x64_sys_wait4+0x17c/0x320 kernel/exit.c:1675
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f7780c26a3e
RSP: 002b:00007ffd81067d80 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 20c49ba5e353f7cf RCX: 00007f7780c26a3e
RDX: 0000000000000001 RSI: 00007ffd81067e1c RDI: 0000000000002133
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000055fee
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000021948c0
R13: 0000000000002133 R14: 00007ffd81067e14 R15: 000000000217b250

CPU: 0 PID: 8509 Comm: syz-executor0 Not tainted 4.17.0+ #9
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:282 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:297 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:689
Call Trace:
 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:464
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:113
 __scd_stamp kernel/sched/clock.c:118 [inline]
 sched_clock_tick+0x3dc/0x410 kernel/sched/clock.c:382
 fail_dump lib/fault-inject.c:51 [inline]
 should_fail+0x87b/0xab0 lib/fault-inject.c:149
 scheduler_tick+0x84/0x490 kernel/sched/core.c:3100
 should_fail_alloc_page mm/page_alloc.c:3067 [inline]
 prepare_alloc_pages mm/page_alloc.c:4326 [inline]
 __alloc_pages_nodemask+0x600/0x5cc0 mm/page_alloc.c:4365
 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+0xc54/0x1630 kernel/time/hrtimer.c:1460
 hrtimer_interrupt+0x451/0x13c0 kernel/time/hrtimer.c:1518
 local_apic_timer_interrupt+0x6b/0x250 arch/x86/kernel/apic/apic.c:1025
 smp_apic_timer_interrupt+0x5a/0x90 arch/x86/kernel/apic/apic.c:1053