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BUG: KMSAN: uninit-value in bond_neigh_setup+0xa4/0x110 drivers/net/bonding/bond_main.c:3745
CPU: 0 PID: 24200 Comm: syz-executor.3 Not tainted 5.5.0-rc1-syzkaller #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+0x1c9/0x220 lib/dump_stack.c:118
 kmsan_report+0xf8/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
 bond_neigh_setup+0xa4/0x110 drivers/net/bonding/bond_main.c:3745
 bond_neigh_init+0x216/0x4b0 drivers/net/bonding/bond_main.c:3716
 ___neigh_create+0x15f1/0x2e20 net/core/neighbour.c:613
 __neigh_create+0xbd/0xd0 net/core/neighbour.c:674
 ip6_finish_output2+0x149a/0x2670 net/ipv6/ip6_output.c:113
 __ip6_finish_output+0x83d/0x8f0 net/ipv6/ip6_output.c:142
 ip6_finish_output+0x2db/0x420 net/ipv6/ip6_output.c:152
 NF_HOOK_COND include/linux/netfilter.h:296 [inline]
 ip6_output+0x60a/0x770 net/ipv6/ip6_output.c:175
 dst_output include/net/dst.h:436 [inline]
 NF_HOOK include/linux/netfilter.h:307 [inline]
 mld_sendpack+0xebd/0x13d0 net/ipv6/mcast.c:1682
 mld_send_cr net/ipv6/mcast.c:1978 [inline]
 mld_ifc_timer_expire+0x1181/0x1790 net/ipv6/mcast.c:2477
 call_timer_fn+0x232/0x530 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers+0xd60/0x1270 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:1140
 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:834
 </IRQ>
RIP: 0010:kmsan_slab_free+0x8c/0xb0 mm/kmsan/kmsan_hooks.c:111
Code: 00 00 b9 03 00 00 00 e8 32 ea ff ff be ff ff ff ff 65 0f c1 35 a5 c8 77 63 ff ce 75 1a e8 9c 93 32 ff 4c 89 7d e0 ff 75 e0 9d <48> 83 c4 10 5b 41 5e 41 5f 5d c3 0f 0b 48 c7 c7 af 16 c7 a9 31 c0
RSP: 0018:ffffb1d34c1af980 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 4cff449e2ce4d500 RBX: ffff8f0d53b8ea80 RCX: 0000000000000003
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffff8f0d538b2960
RBP: ffffb1d34c1af9a8 R08: ffffd3e78000000f R09: ffff8f0cafffb000
R10: 000000000000000e R11: ffffffff9c063cc0 R12: 0000000000000000
R13: ffff8f0d538b2960 R14: ffff8f0d538b2960 R15: 0000000000000246
 slab_free_freelist_hook mm/slub.c:1458 [inline]
 slab_free mm/slub.c:3021 [inline]
 kfree+0x8ce/0x3090 mm/slub.c:3974
 kvfree+0xa6/0xc0 mm/util.c:603
 kvm_arch_free_memslot+0x204/0x760 arch/x86/kvm/x86.c:9686
 kvm_free_memslot arch/x86/kvm/../../../virt/kvm/kvm_main.c:595 [inline]
 kvm_free_memslots arch/x86/kvm/../../../virt/kvm/kvm_main.c:608 [inline]
 kvm_destroy_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:819 [inline]
 kvm_put_kvm+0x14a7/0x1b00 arch/x86/kvm/../../../virt/kvm/kvm_main.c:837
 kvm_vm_release+0x67/0x90 arch/x86/kvm/../../../virt/kvm/kvm_main.c:860
 __fput+0x4c9/0xba0 fs/file_table.c:280
 ____fput+0x37/0x40 fs/file_table.c:313
 task_work_run+0x22e/0x2a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop arch/x86/entry/common.c:164 [inline]
 prepare_exit_to_usermode+0x3cf/0x530 arch/x86/entry/common.c:195
 syscall_return_slowpath+0x90/0x610 arch/x86/entry/common.c:278
 do_syscall_64+0xdc/0x160 arch/x86/entry/common.c:306
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4144b1
Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:0000000000a6fbf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00000000004144b1
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 0000000000000001 R08: 00000000389ed1cc R09: ffffffffffffffff
R10: 0000000000a6fcd0 R11: 0000000000000293 R12: 000000000075bf20
R13: 000000000013c459 R14: 0000000000761160 R15: 000000000075bf2c

Local variable ----parms@bond_neigh_init created at:
 bond_neigh_init+0x8c/0x4b0 drivers/net/bonding/bond_main.c:3707
 bond_neigh_init+0x8c/0x4b0 drivers/net/bonding/bond_main.c:3707
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