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BUG: KMSAN: uninit-value in bond_neigh_setup+0xa4/0x110 drivers/net/bonding/bond_main.c:3745
CPU: 0 PID: 12383 Comm: syz-executor.5 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_alloc+0xb5/0xe0 mm/kmsan/kmsan_hooks.c:85
Code: eb 0a ba 01 00 00 00 e8 c9 ec ff ff be ff ff ff ff 65 0f c1 35 5c c9 17 7d ff ce 75 1c e8 53 94 32 ff 4c 89 65 d8 ff 75 d8 9d <48> 83 c4 10 5b 41 5c 41 5e 41 5f 5d c3 0f 0b 48 c7 c7 af 16 27 90
RSP: 0018:ffffb1d0429af870 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 405d22a17f201700 RBX: ffff9510b492b640 RCX: 0000000000000033
RDX: 0000000000000032 RSI: 0000000000000000 RDI: ffff9510b492b640
RBP: ffffb1d0429af8a0 R08: fffff6268000000f R09: ffff9511afffb000
R10: 000000000000000b R11: ffffffff82663cc0 R12: 0000000000000246
R13: ffffffffffffffff R14: 0000000000000cc0 R15: ffff95109b7b5a40
 slab_alloc_node mm/slub.c:2774 [inline]
 slab_alloc mm/slub.c:2783 [inline]
 kmem_cache_alloc+0x8f9/0xd70 mm/slub.c:2788
 vm_area_dup kernel/fork.c:360 [inline]
 dup_mmap+0xb6e/0x1d60 kernel/fork.c:545
 dup_mm+0x1f2/0x710 kernel/fork.c:1362
 copy_mm kernel/fork.c:1418 [inline]
 copy_process+0x43af/0x9720 kernel/fork.c:2074
 _do_fork+0x255/0xfa0 kernel/fork.c:2423
 __do_sys_clone kernel/fork.c:2578 [inline]
 __se_sys_clone+0x35b/0x3a0 kernel/fork.c:2559
 __x64_sys_clone+0x62/0x80 kernel/fork.c:2559
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x458eea
Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00
RSP: 002b:0000000000a6fd60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000a6fd60 RCX: 0000000000458eea
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000a6fda0 R08: 0000000000000001 R09: 0000000001d49940
R10: 0000000001d49c10 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000a6fdf0

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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