==================================================================
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: 31235 Comm: syz-executor6 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
 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:866
 </IRQ>
RIP: 0010:rcu_all_qs+0xd/0x1f0 kernel/rcu/tree.c:475
RSP: 0018:ffff8800ac27f568 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 0000000080000000 RBX: ffff8800afb508d8 RCX: 0000000000000002
RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff8800ac27f5a4
RBP: ffff8800ac27f590 R08: 0000000001080020 R09: 0000000000000002
R10: 0000000000000000 R11: 000000000000000b R12: 0000000000000000
R13: ffff8800afb508d8 R14: ffff8800afb508d8 R15: 0000000000000000
 _cond_resched+0x3c/0xd0 kernel/sched/core.c:5002
 mutex_lock_killable+0x31/0xc0 kernel/locking/mutex.c:1122
 pcpu_alloc+0x2eb/0x2040 mm/percpu.c:1384
 __alloc_percpu+0x7a/0x90 mm/percpu.c:1548
 alloc_vfsmnt+0x3ce/0xcf0 fs/namespace.c:220
 clone_mnt+0xce/0x1d90 fs/namespace.c:1077
 copy_tree+0x91f/0x1dc0 fs/namespace.c:1806
 propagate_one+0x87c/0xee0 fs/pnode.c:265
 propagate_mnt+0x3bb/0x12d0 fs/pnode.c:315
 attach_recursive_mnt+0xb67/0x3c70 fs/namespace.c:2033
 graft_tree fs/namespace.c:2133 [inline]
 do_loopback fs/namespace.c:2254 [inline]
 do_mount+0x3e4a/0x4ed0 fs/namespace.c:2842
 ksys_mount+0x32e/0x3d0 fs/namespace.c:3064
 __do_sys_mount fs/namespace.c:3078 [inline]
 __se_sys_mount fs/namespace.c:3075 [inline]
 __x64_sys_mount+0x157/0x1c0 fs/namespace.c:3075
 do_syscall_64+0x15b/0x230 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x455a99
RSP: 002b:00007ffa9e080c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffa9e0816d4 RCX: 0000000000455a99
RDX: 0000000020753000 RSI: 0000000020187ff8 RDI: 0000000020377ff8
RBP: 000000000072bf48 R08: 00000000200e7000 R09: 0000000000000000
R10: 0000000000005010 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004c1e89 R14: 00000000004cf510 R15: 0000000000000001

Uninit was stored to memory at:
 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
 __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
==================================================================