==================================================================
BUG: KMSAN: uninit-value in lock_timer_base kernel/time/timer.c:939 [inline]
BUG: KMSAN: uninit-value in __mod_timer+0x42d/0x2bf0 kernel/time/timer.c:1010
CPU: 0 PID: 2588 Comm: udevd Not tainted 4.17.0+ #8
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:1122
 __msan_warning_32+0x70/0xc0 mm/kmsan/kmsan_instr.c:620
 lock_timer_base kernel/time/timer.c:939 [inline]
 __mod_timer+0x42d/0x2bf0 kernel/time/timer.c:1010
 mod_timer+0x70/0x80 kernel/time/timer.c:1102
 estimation_timer+0x12ed/0x1310 net/netfilter/ipvs/ip_vs_est.c:138
 call_timer_fn+0x280/0x5d0 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0xd96/0x11b0 kernel/time/timer.c:1666
 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692
 __do_softirq+0x592/0x979 kernel/softirq.c:285
 invoke_softirq kernel/softirq.c:365 [inline]
 irq_exit+0x202/0x240 kernel/softirq.c:405
 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:525
 smp_apic_timer_interrupt+0x64/0x90 arch/x86/kernel/apic/apic.c:1055
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863
 </IRQ>
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:__msan_poison_alloca+0x14c/0x1d0 mm/kmsan/kmsan_instr.c:587
RSP: 0018:ffff88019828f730 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000081000000 RBX: 0000000081000000 RCX: ffff88019828f770
RDX: 0000000000000004 RSI: 0000000000000004 RDI: 00000000697e2f14
RBP: ffff88019828f7d0 R08: 0000000001080020 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff8ac87390 R14: 0000000000000246 R15: ffff8801987f0000
 rcu_all_qs+0x32/0x1f0 kernel/rcu/tree.c:478
 _cond_resched+0x3c/0xd0 kernel/sched/core.c:5002
 zap_pud_range mm/memory.c:1473 [inline]
 zap_p4d_range mm/memory.c:1492 [inline]
 unmap_page_range+0x38e1/0x3be0 mm/memory.c:1513
 unmap_single_vma+0x445/0x5e0 mm/memory.c:1558
 unmap_vmas+0x1f4/0x360 mm/memory.c:1588
 unmap_region+0x3dc/0x580 mm/mmap.c:2570
 do_munmap+0x1a2e/0x26c0 mm/mmap.c:2785
 vm_munmap mm/mmap.c:2804 [inline]
 __do_sys_munmap mm/mmap.c:2814 [inline]
 __se_sys_munmap mm/mmap.c:2811 [inline]
 __x64_sys_munmap+0x1e2/0x260 mm/mmap.c:2811
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fee7076dd37
RSP: 002b:00007ffcc3b1b1a8 EFLAGS: 00000206 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 0000000001f11240 RCX: 00007fee7076dd37
RDX: 0000000000000000 RSI: 0000000000001000 RDI: 00007fee71064000
RBP: 0000000000000000 R08: 00007fee7105d7a0 R09: 0000000000000000
R10: 1999999999999999 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000420298 R14: 00007ffcc3b1b632 R15: 000000000000000b

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:686
 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:464
 timer_set_idx kernel/time/timer.c:480 [inline]
 enqueue_timer kernel/time/timer.c:539 [inline]
 __internal_add_timer kernel/time/timer.c:548 [inline]
 internal_add_timer kernel/time/timer.c:590 [inline]
 __mod_timer+0x22a1/0x2bf0 kernel/time/timer.c:1055
 mod_timer+0x70/0x80 kernel/time/timer.c:1102
 estimation_timer+0x12ed/0x1310 net/netfilter/ipvs/ip_vs_est.c:138
 call_timer_fn+0x280/0x5d0 kernel/time/timer.c:1326
 expire_timers kernel/time/timer.c:1363 [inline]
 __run_timers+0xd96/0x11b0 kernel/time/timer.c:1666
 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692
 __do_softirq+0x592/0x979 kernel/softirq.c:285

Local variable description: ----heads@__run_timers
Variable was created at:
 __run_timers+0x84/0x11b0 kernel/time/timer.c:1651
 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692
==================================================================