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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
 kmsan_get_shadow_origin_ptr+0xa/0xa0 mm/kmsan/shadow.c:83
 get_shadow_origin_ptr mm/kmsan/instrumentation.c:36 [inline]
 __msan_metadata_ptr_for_store_4+0x27/0x40 mm/kmsan/instrumentation.c:91
 __skb_dst_copy include/net/dst.h:275 [inline]
 skb_dst_copy include/net/dst.h:283 [inline]
 __copy_skb_header+0x24d/0xac0 net/core/skbuff.c:1192
 __skb_clone+0xa2/0xa40 net/core/skbuff.c:1243
 skb_clone+0x4a9/0x670 net/core/skbuff.c:1721
 dev_queue_xmit_nit+0x523/0x1400 net/core/dev.c:2258
 xmit_one net/core/dev.c:3579 [inline]
 dev_hard_start_xmit+0x21d/0xb50 net/core/dev.c:3599
 sch_direct_xmit+0x5f0/0x1400 net/sched/sch_generic.c:342
 __dev_xmit_skb net/core/dev.c:3810 [inline]
 __dev_queue_xmit+0x3c80/0x6290 net/core/dev.c:4215
 dev_queue_xmit include/linux/netdevice.h:3035 [inline]
 lapbeth_data_transmit+0x569/0x5a0 drivers/net/wan/lapbether.c:259
 lapb_data_transmit+0xd7/0x140 net/lapb/lapb_iface.c:447
 lapb_transmit_buffer+0x3e1/0x480 net/lapb/lapb_out.c:149
 lapb_send_control+0x78a/0x840 net/lapb/lapb_subr.c:251
 lapb_t1timer_expiry+0xc36/0xe80
 call_timer_fn+0x8d/0x580 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x94f/0x11c0 kernel/time/timer.c:2022
 run_timer_softirq+0x75/0xf0 kernel/time/timer.c:2035
 __do_softirq+0x211/0x818 kernel/softirq.c:571
 invoke_softirq kernel/softirq.c:445 [inline]
 __irq_exit_rcu+0x117/0x260 kernel/softirq.c:650
 irq_exit_rcu+0x12/0x20 kernel/softirq.c:662
 sysvec_apic_timer_interrupt+0x4d/0xc0 arch/x86/kernel/apic/apic.c:1107
 asm_sysvec_apic_timer_interrupt+0x1f/0x30 arch/x86/include/asm/idtentry.h:649

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
 dev_queue_xmit_nit+0x523/0x1400 net/core/dev.c:2258
 xmit_one net/core/dev.c:3579 [inline]
 dev_hard_start_xmit+0x21d/0xb50 net/core/dev.c:3599
 sch_direct_xmit+0x5f0/0x1400 net/sched/sch_generic.c:342
 __dev_xmit_skb net/core/dev.c:3810 [inline]
 __dev_queue_xmit+0x3c80/0x6290 net/core/dev.c:4215
 dev_queue_xmit include/linux/netdevice.h:3035 [inline]
 lapbeth_data_transmit+0x569/0x5a0 drivers/net/wan/lapbether.c:259
 lapb_data_transmit+0xd7/0x140 net/lapb/lapb_iface.c:447
 lapb_transmit_buffer+0x3e1/0x480 net/lapb/lapb_out.c:149
 lapb_send_control+0x78a/0x840 net/lapb/lapb_subr.c:251
 lapb_t1timer_expiry+0xc36/0xe80
 call_timer_fn+0x8d/0x580 kernel/time/timer.c:1700
 expire_timers kernel/time/timer.c:1751 [inline]
 __run_timers+0x94f/0x11c0 kernel/time/timer.c:2022
 run_timer_softirq+0x75/0xf0 kernel/time/timer.c:2035
 __do_softirq+0x211/0x818 kernel/softirq.c:571

CPU: 1 PID: 5000 Comm: syz-fuzzer Not tainted 6.2.0-rc8-syzkaller-80998-g9c866a280876 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
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