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BUG: KMSAN: uninit-value in __list_add_valid+0x1a2/0x450 lib/list_debug.c:23
CPU: 0 PID: 31149 Comm: syz-executor276 Not tainted 4.17.0-rc5+ #103
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
 __list_add_valid+0x1a2/0x450 lib/list_debug.c:23
 __list_add include/linux/list.h:60 [inline]
 list_add include/linux/list.h:79 [inline]
 account_entity_enqueue kernel/sched/fair.c:2652 [inline]
 enqueue_entity kernel/sched/fair.c:4176 [inline]
 enqueue_task_fair+0xe02/0x4470 kernel/sched/fair.c:5359
 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+0x1430/0x20b0 kernel/sched/core.c:2058
 wake_up_process+0x34/0x40 kernel/sched/core.c:2131
 wake_up_q+0x5f/0xa0 kernel/sched/core.c:448
 futex_wake+0x955/0xba0 kernel/futex.c:1556
 do_futex+0x28d1/0x6ad0 kernel/futex.c:3531
 __do_sys_futex kernel/futex.c:3587 [inline]
 __se_sys_futex+0x3fe/0x820 kernel/futex.c:3555
 __x64_sys_futex+0x1a2/0x200 kernel/futex.c:3555
 do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4468d9
RSP: 002b:00007ffeb65e8238 EFLAGS: 00000202 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00000000006dcc20 RCX: 00000000004468d9
RDX: 00000000004468d9 RSI: 0000000000000001 RDI: 00000000006dcc24
RBP: 0000000000000000 R08: 0000000000000455 R09: 0000000000000455
R10: 0000000000000455 R11: 0000000000000202 R12: 00000000006dcc24
R13: 00000000006dcda0 R14: 0000000000000001 R15: 0000000000000004

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
 __write_once_size include/linux/compiler.h:224 [inline]
 __list_add include/linux/list.h:66 [inline]
 list_add include/linux/list.h:79 [inline]
 account_entity_enqueue kernel/sched/fair.c:2652 [inline]
 enqueue_entity kernel/sched/fair.c:4176 [inline]
 enqueue_task_fair+0x2932/0x4470 kernel/sched/fair.c:5359
 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+0x1430/0x20b0 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: ----t.i.i@__se_sys_nanosleep
Variable was created at:
 __se_sys_nanosleep+0x5f/0x6a0 kernel/time/hrtimer.c:1762
 __x64_sys_nanosleep+0x92/0xc0 kernel/time/hrtimer.c:1762
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