=====================================================
BUG: KMSAN: uninit-value in __hlist_del include/linux/list.h:763 [inline]
BUG: KMSAN: uninit-value in detach_timer kernel/time/timer.c:815 [inline]
BUG: KMSAN: uninit-value in expire_timers kernel/time/timer.c:1438 [inline]
BUG: KMSAN: uninit-value in __run_timers+0xc19/0x1270 kernel/time/timer.c:1773
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.4.0-rc5+ #0
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+0x191/0x1f0 lib/dump_stack.c:113
 kmsan_report+0x128/0x220 mm/kmsan/kmsan_report.c:108
 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:245
 __hlist_del include/linux/list.h:763 [inline]
 detach_timer kernel/time/timer.c:815 [inline]
 expire_timers kernel/time/timer.c:1438 [inline]
 __run_timers+0xc19/0x1270 kernel/time/timer.c:1773
 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:375 [inline]
 irq_exit+0x230/0x280 kernel/softirq.c:416
 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:536
 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1139
 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:837
 </IRQ>
RIP: 0010:default_idle+0x53/0x90 arch/x86/kernel/process.c:581
Code: f3 14 ec f2 44 8b 35 44 74 cf 01 48 c7 c7 88 e5 23 90 e8 b0 95 b2 f3 83 38 00 75 31 45 85 f6 7e 07 0f 00 2d e7 ed 4c 00 fb f4 <65> 8b 35 ce 41 ae 71 c7 03 00 00 00 00 c7 43 08 00 00 00 00 bf ff
RSP: 0018:ffff8881280bfe10 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: ffff888217c37588 RBX: ffff8881280909a8 RCX: ccccccccccccd000
RDX: ffff888207e30588 RSI: ffffea000a76d130 RDI: 000000001023e588
RBP: ffff8881280bfe20 R08: 0000000000000002 R09: ffff888128098002
R10: 0000000000000004 R11: ffffffff8e547110 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: ffff8881280909a8
 arch_cpu_idle+0x25/0x30 arch/x86/kernel/process.c:571
 default_idle_call kernel/sched/idle.c:94 [inline]
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x1d5/0x780 kernel/sched/idle.c:263
 cpu_startup_entry+0x45/0x50 kernel/sched/idle.c:355
 start_secondary+0x389/0x480 arch/x86/kernel/smpboot.c:264
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline]
 kmsan_internal_poison_shadow+0x60/0x120 mm/kmsan/kmsan.c:134
 kmsan_slab_alloc+0xaa/0x120 mm/kmsan/kmsan_hooks.c:88
 slab_alloc_node mm/slub.c:2799 [inline]
 slab_alloc mm/slub.c:2808 [inline]
 __kmalloc_track_caller+0xa56/0xeb0 mm/slub.c:4377
 kmemdup+0x95/0x140 mm/util.c:127
 nf_conntrack_standalone_init_sysctl net/netfilter/nf_conntrack_standalone.c:1030 [inline]
 nf_conntrack_pernet_init+0x89/0x1a80 net/netfilter/nf_conntrack_standalone.c:1118
 ops_init+0x2d3/0x730 net/core/net_namespace.c:137
 setup_net+0x28e/0x12a0 net/core/net_namespace.c:335
 copy_net_ns+0x73e/0x970 net/core/net_namespace.c:476
 create_new_namespaces+0x8d8/0xda0 kernel/nsproxy.c:103
 unshare_nsproxy_namespaces+0x25e/0x340 kernel/nsproxy.c:202
 ksys_unshare+0x883/0x1110 kernel/fork.c:2829
 __do_sys_unshare kernel/fork.c:2897 [inline]
 __se_sys_unshare+0x41/0x60 kernel/fork.c:2895
 __x64_sys_unshare+0x32/0x50 kernel/fork.c:2895
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
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