================================================================== BUG: KMSAN: uninit-value in accumulate_sum kernel/sched/fair.c:3131 [inline] BUG: KMSAN: uninit-value in ___update_load_sum kernel/sched/fair.c:3214 [inline] BUG: KMSAN: uninit-value in __update_load_avg_cfs_rq kernel/sched/fair.c:3320 [inline] BUG: KMSAN: uninit-value in update_cfs_rq_load_avg+0x1370/0x1aa0 kernel/sched/fair.c:3696 CPU: 0 PID: 4864 Comm: syz-executor2 Not tainted 4.17.0+ #19 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+0x188/0x2a0 mm/kmsan/kmsan.c:1465 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:651 accumulate_sum kernel/sched/fair.c:3131 [inline] ___update_load_sum kernel/sched/fair.c:3214 [inline] __update_load_avg_cfs_rq kernel/sched/fair.c:3320 [inline] update_cfs_rq_load_avg+0x1370/0x1aa0 kernel/sched/fair.c:3696 update_load_avg+0xe50/0x2cc0 kernel/sched/fair.c:3797 entity_tick kernel/sched/fair.c:4463 [inline] task_tick_fair+0x1aa/0x1050 kernel/sched/fair.c:9893 scheduler_tick+0x28d/0x490 kernel/sched/core.c:3105 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 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:868 RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:37 [inline] RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:78 [inline] RIP: 0010:kmsan_alloc_page+0xa4/0xe0 mm/kmsan/kmsan.c:1165 RSP: 0018:ffff880162ecf3d8 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000246 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffffea00098c0c40 RSI: 0000000000000000 RDI: ffffea00098c0c40 RBP: ffff880162ecf418 R08: 0000000000000000 R09: 00000000ffffffff R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8801b53f9d40 R14: 00000000015080c0 R15: ffffea00098c0ca0 __alloc_pages_nodemask+0xf7b/0x5cc0 mm/page_alloc.c:4404 alloc_pages_current+0x6b1/0x970 mm/mempolicy.c:2093 alloc_pages include/linux/gfp.h:494 [inline] pte_alloc_one+0x56/0x100 arch/x86/mm/pgtable.c:30 __pte_alloc+0x86/0x410 mm/memory.c:655 copy_pte_range mm/memory.c:1077 [inline] copy_pmd_range mm/memory.c:1153 [inline] copy_pud_range mm/memory.c:1187 [inline] copy_p4d_range mm/memory.c:1209 [inline] copy_page_range+0x3030/0x3f50 mm/memory.c:1271 dup_mmap kernel/fork.c:512 [inline] dup_mm kernel/fork.c:1235 [inline] copy_mm kernel/fork.c:1289 [inline] copy_process+0x6d9b/0x9be0 kernel/fork.c:1795 _do_fork+0x353/0xf60 kernel/fork.c:2089 __do_sys_clone kernel/fork.c:2196 [inline] __se_sys_clone kernel/fork.c:2190 [inline] __x64_sys_clone+0x15e/0x1b0 kernel/fork.c:2190 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x45416a RSP: 002b:0000000000a3ea70 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000a3ea70 RCX: 000000000045416a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000a3eab0 R08: 0000000000000001 R09: 0000000002130940 R10: 0000000002130c10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 00000000007024c0 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:312 [inline] kmsan_save_stack mm/kmsan/kmsan.c:327 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:717 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:494 update_load_add kernel/sched/fair.c:123 [inline] account_entity_enqueue kernel/sched/fair.c:2644 [inline] reweight_entity+0x1610/0x1a30 kernel/sched/fair.c:2794 update_cfs_group kernel/sched/fair.c:2991 [inline] entity_tick kernel/sched/fair.c:4464 [inline] task_tick_fair+0x5f8/0x1050 kernel/sched/fair.c:9893 scheduler_tick+0x28d/0x490 kernel/sched/core.c:3105 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 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:312 [inline] kmsan_save_stack mm/kmsan/kmsan.c:327 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:717 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:494 update_load_set kernel/sched/fair.c:135 [inline] reweight_entity+0x128b/0x1a30 kernel/sched/fair.c:2780 update_cfs_group kernel/sched/fair.c:2991 [inline] entity_tick kernel/sched/fair.c:4464 [inline] task_tick_fair+0x5f8/0x1050 kernel/sched/fair.c:9893 scheduler_tick+0x28d/0x490 kernel/sched/core.c:3105 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 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+0x107/0x13c0 kernel/time/hrtimer.c:1499 ==================================================================