=====================================================
BUG: KMSAN: uninit-value in native_apic_mem_write+0x72/0x90 arch/x86/include/asm/apic.h:105
 native_apic_mem_write+0x72/0x90 arch/x86/include/asm/apic.h:105
 apic_eoi arch/x86/include/asm/apic.h:398 [inline]
 ack_APIC_irq arch/x86/include/asm/apic.h:444 [inline]
 __sysvec_reschedule_ipi arch/x86/kernel/smp.c:227 [inline]
 sysvec_reschedule_ipi+0x35/0x120 arch/x86/kernel/smp.c:225
 asm_sysvec_reschedule_ipi+0x1f/0x30 arch/x86/include/asm/idtentry.h:654
 __skb_dst_copy include/net/dst.h:275 [inline]
 skb_dst_copy include/net/dst.h:283 [inline]
 __copy_skb_header+0x1e5/0xac0 net/core/skbuff.c:1192
 __skb_clone+0xa2/0xa40 net/core/skbuff.c:1243
 skb_clone+0x4a9/0x670 net/core/skbuff.c:1721
 macvlan_broadcast_enqueue drivers/net/macvlan.c:349 [inline]
 macvlan_handle_frame+0xba1/0x2130 drivers/net/macvlan.c:480
 __netif_receive_skb_core+0x1f2d/0x6510 net/core/dev.c:5376
 __netif_receive_skb_one_core net/core/dev.c:5480 [inline]
 __netif_receive_skb+0xf7/0x640 net/core/dev.c:5596
 process_backlog+0x50c/0xb80 net/core/dev.c:5924
 __napi_poll+0x144/0xbb0 net/core/dev.c:6485
 napi_poll net/core/dev.c:6552 [inline]
 net_rx_action+0xa41/0x1a90 net/core/dev.c:6663
 __do_softirq+0x211/0x818 kernel/softirq.c:571
 do_softirq+0x171/0x220 kernel/softirq.c:472
 __local_bh_enable_ip+0xd9/0xe0 kernel/softirq.c:396
 local_bh_enable+0x3a/0x40 include/linux/bottom_half.h:33
 rcu_read_unlock_bh include/linux/rcupdate.h:834 [inline]
 ip6_finish_output2+0x244e/0x2c60 net/ipv6/ip6_output.c:135
 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline]
 ip6_finish_output+0xcd3/0x1630 net/ipv6/ip6_output.c:206
 NF_HOOK_COND include/linux/netfilter.h:291 [inline]
 ip6_output+0x493/0x820 net/ipv6/ip6_output.c:227
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:302 [inline]
 mld_sendpack+0xffd/0x1a00 net/ipv6/mcast.c:1820
 mld_send_cr net/ipv6/mcast.c:2121 [inline]
 mld_ifc_work+0x1303/0x1a10 net/ipv6/mcast.c:2653
 process_one_work+0xe73/0x18d0 kernel/workqueue.c:2289
 worker_thread+0x10fc/0x2230 kernel/workqueue.c:2436
 kthread+0x3c7/0x500 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Uninit was created at:
 slab_post_alloc_hook+0x271/0xf70 mm/slab.h:766
 slab_alloc_node mm/slub.c:3452 [inline]
 slab_alloc mm/slub.c:3460 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3467 [inline]
 kmem_cache_alloc+0x586/0xb40 mm/slub.c:3476
 skb_clone+0x3ec/0x670 net/core/skbuff.c:1714
 macvlan_broadcast_enqueue drivers/net/macvlan.c:349 [inline]
 macvlan_handle_frame+0xba1/0x2130 drivers/net/macvlan.c:480
 __netif_receive_skb_core+0x1f2d/0x6510 net/core/dev.c:5376
 __netif_receive_skb_one_core net/core/dev.c:5480 [inline]
 __netif_receive_skb+0xf7/0x640 net/core/dev.c:5596
 process_backlog+0x50c/0xb80 net/core/dev.c:5924
 __napi_poll+0x144/0xbb0 net/core/dev.c:6485
 napi_poll net/core/dev.c:6552 [inline]
 net_rx_action+0xa41/0x1a90 net/core/dev.c:6663
 __do_softirq+0x211/0x818 kernel/softirq.c:571

CPU: 1 PID: 5095 Comm: kworker/1:5 Not tainted 6.2.0-rc8-syzkaller-80998-g9c866a280876 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Workqueue: mld mld_ifc_work
=====================================================