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BUG: KMSAN: uninit-value in bond_neigh_setup+0xa4/0x110 drivers/net/bonding/bond_main.c:3745
CPU: 1 PID: 12848 Comm: blkid 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 57 59 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 e7 b3
RSP: 0018:ffff955704b0f860 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: c31a1b44e71a6c00 RBX: ffff9377165fe960 RCX: 0000000000000033
RDX: 0000000000000032 RSI: 0000000000000000 RDI: ffff9377165fe960
RBP: ffff955704b0f890 R08: ffffca0e0000000f R09: ffff93766fffb000
R10: 000000000000000c R11: ffffffffa6263cc0 R12: 0000000000000246
R13: ffffffffffffffff R14: 0000000000000cc0 R15: ffff93766faa0a80
 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_alloc+0x71/0x270 kernel/fork.c:352
 mmap_region+0x1b83/0x3950 mm/mmap.c:1754
 do_mmap+0x1829/0x1f70 mm/mmap.c:1555
 do_mmap_pgoff include/linux/mm.h:2338 [inline]
 vm_mmap_pgoff+0x31a/0x440 mm/util.c:506
 ksys_mmap_pgoff+0xa5b/0xb00 mm/mmap.c:1607
 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:100 [inline]
 __se_sys_mmap+0x172/0x1a0 arch/x86/kernel/sys_x86_64.c:91
 __x64_sys_mmap+0x69/0x90 arch/x86/kernel/sys_x86_64.c:91
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f928beb33ea
Code: 48 8d 3d 81 69 00 00 b2 84 e8 52 ec ff ff f7 d8 89 05 ae ad 20 00 eb c6 90 90 90 90 90 90 90 90 49 89 ca b8 09 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8d 0d 8a ad 20 00 31 d2 48 29 c2 89
RSP: 002b:00007ffd41d03c08 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f928c0bb9a8 RCX: 00007f928beb33ea
RDX: 0000000000000005 RSI: 000000000038c838 RDI: 0000000000000000
RBP: 00007ffd41d03f60 R08: 0000000000000003 R09: 0000000000000000
R10: 0000000000000802 R11: 0000000000000246 R12: 00007ffd41d04048
R13: 0000000000000002 R14: 0000000000000003 R15: 00007ffd41d03c50

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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