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BUG: KMSAN: uninit-value in bond_neigh_setup+0xa4/0x110 drivers/net/bonding/bond_main.c:3745
CPU: 1 PID: 17852 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_alloc_page+0x2ed/0x310 mm/kmsan/kmsan_shadow.c:339
Code: 83 c3 50 48 39 c1 7c e5 be ff ff ff ff 65 0f c1 35 58 b2 d7 5b ff ce 75 25 e8 4f 7d 32 ff 48 8b 45 c8 48 89 45 c0 ff 75 c0 9d <44> 89 f8 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 0f 0b 48 c7
RSP: 0000:ffffbaaf0294f7b0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000246 RBX: fffff6024142a758 RCX: 0000000000000001
RDX: fffff6024142a760 RSI: 0000000000000000 RDI: fffff6024142a760
RBP: ffffbaaf0294f7f8 R08: 0000000000000001 R09: ffff9d45afd43d90
R10: 0000000000000004 R11: 0000000000000001 R12: fffff6024142a760
R13: ccccccccccccd000 R14: fffff6024142a7b0 R15: 0000000000000000
 __alloc_pages_nodemask+0x1421/0x5fd0 mm/page_alloc.c:4800
 alloc_pages_current+0x68d/0x9a0 mm/mempolicy.c:2207
 alloc_pages include/linux/gfp.h:534 [inline]
 __pte_alloc_one include/asm-generic/pgalloc.h:63 [inline]
 pte_alloc_one+0x59/0x1a0 arch/x86/mm/pgtable.c:26
 do_fault_around mm/memory.c:3542 [inline]
 do_read_fault mm/memory.c:3582 [inline]
 do_fault mm/memory.c:3716 [inline]
 handle_pte_fault mm/memory.c:3947 [inline]
 __handle_mm_fault mm/memory.c:4077 [inline]
 handle_mm_fault+0x5b45/0x9f80 mm/memory.c:4114
 do_user_addr_fault+0x905/0x1510 arch/x86/mm/fault.c:1461
 __do_page_fault+0x1a2/0x410 arch/x86/mm/fault.c:1526
 do_page_fault+0xbb/0x500 arch/x86/mm/fault.c:1550
 page_fault+0x4e/0x60 arch/x86/entry/entry_64.S:1213
RIP: 0033:0x7f9782edbf84
Code: 10 4d 89 4b 18 5b 5d c3 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 08 48 8b 87 98 02 00 00 48 85 c0 74 5f 48 8b 40 08 <8b> 08 89 8f ec 02 00 00 8b 50 08 44 8b 40 04 8d 72 ff 85 d6 75 72
RSP: 002b:00007ffc05278a50 EFLAGS: 00010202
RAX: 00007f978271a460 RBX: 00007f97830eb000 RCX: 00007f9782ee91d7
RDX: 00007f978291de40 RSI: 0000000000000030 RDI: 00007f97830eb000
RBP: 00007ffc05278bc0 R08: 0000000070000029 R09: 000000006ffffdff
R10: 000000006ffffeff R11: 0000000000000202 R12: 00007ffc05278ca8
R13: 000000006fffff48 R14: 00007ffc05278970 R15: 00007ffc05278910

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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