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BUG: KMSAN: uninit-value in __list_del_entry_valid+0x38a/0x440 lib/list_debug.c:54
CPU: 0 PID: 4538 Comm: syz-executor175 Not tainted 4.17.0-rc5+ #102
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_del_entry_valid+0x38a/0x440 lib/list_debug.c:54
 __list_del_entry include/linux/list.h:117 [inline]
 list_del_init include/linux/list.h:159 [inline]
 account_entity_dequeue kernel/sched/fair.c:2667 [inline]
 dequeue_entity kernel/sched/fair.c:4267 [inline]
 dequeue_task_fair+0xad7/0x3300 kernel/sched/fair.c:5407
 dequeue_task kernel/sched/core.c:762 [inline]
 deactivate_task+0x50f/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+0x4b3/0x6a0 kernel/time/hrtimer.c:1762
 __x64_sys_nanosleep+0x92/0xc0 kernel/time/hrtimer.c:1762
 do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x444e40
RSP: 002b:00007ffd3fa5c448 EFLAGS: 00000246 ORIG_RAX: 0000000000000023
RAX: ffffffffffffffda RBX: 0000000000005c14 RCX: 0000000000444e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffd3fa5c450
RBP: 0000000000005c14 R08: 00000000000011ba R09: 0000000000b15880
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000c85c2
R13: 00000000004079c0 R14: 0000000000000000 R15: 0000000000000000

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
 __list_add include/linux/list.h:64 [inline]
 list_add include/linux/list.h:79 [inline]
 list_move include/linux/list.h:171 [inline]
 pick_next_task_fair+0x243b/0x2520 kernel/sched/fair.c:6968
 pick_next_task+0x1b1/0x410 kernel/sched/core.c:3351
 __schedule+0x20b/0x730 kernel/sched/core.c:3481
 do_task_dead+0xc8/0xf0 kernel/sched/core.c:3524
 do_exit+0x340e/0x38d0 kernel/exit.c:924
 do_group_exit+0x1a0/0x360 kernel/exit.c:970
 __do_sys_exit_group+0x21/0x30 kernel/exit.c:981
 __se_sys_exit_group+0x14/0x20 kernel/exit.c:979
 __x64_sys_exit_group+0x4c/0x50 kernel/exit.c:979
 do_syscall_64+0x152/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
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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