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BUG: KMSAN: uninit-value in bond_neigh_setup+0xa4/0x110 drivers/net/bonding/bond_main.c:3745
CPU: 1 PID: 13111 Comm: syz-executor.4 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:metadata_is_contiguous+0x3f/0x1c0 mm/kmsan/kmsan.c:475
Code: 56 26 b7 49 c7 c6 80 bd 04 b7 85 d2 4c 0f 45 f0 41 b7 01 48 85 f6 0f 84 72 01 00 00 49 89 f4 48 89 fb 48 8d 44 37 ff 48 31 f8 <48> 3d 00 10 00 00 0f 82 58 01 00 00 4e 8d 2c 23 0f b6 d2 be 01 00
RSP: 0000:ffff9bf5c2adfa30 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: ffffdf77835f8818 RCX: 0000000000000008
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffdf77835f8818
RBP: ffff9bf5c2adfa80 R08: 0000000000000002 R09: ffff9bf5c2adfa78
R10: 0000000000000004 R11: 0000000000000001 R12: 0000000000000008
R13: ffff9bf5c2adfce0 R14: ffffffffb704bd80 R15: 0000000000000001
 kmsan_get_shadow_origin_ptr+0x5e/0xb0 mm/kmsan/kmsan_shadow.c:153
 __msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55
 compound_head include/linux/compiler.h:206 [inline]
 PageKsm include/linux/page-flags.h:482 [inline]
 do_wp_page+0x527/0x3170 mm/memory.c:2673
 handle_pte_fault mm/memory.c:3963 [inline]
 __handle_mm_fault mm/memory.c:4077 [inline]
 handle_mm_fault+0x4c2f/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: 0033:0x4319f6
Code: 1f 44 00 00 48 29 e8 31 c9 48 81 fb 40 a6 71 00 0f 95 c1 48 8d 34 2a 48 83 cd 01 48 c1 e1 02 48 83 c8 01 48 09 e9 48 89 73 58 <48> 89 4a 08 48 89 46 08 48 8d 4a 10 8b 05 4c 57 64 00 85 c0 0f 84
RSP: 002b:0000000000a6eb20 EFLAGS: 00010206
RAX: 0000000000018691 RBX: 000000000071a640 RCX: 0000000000008041
RDX: 0000000001141930 RSI: 0000000001149970 RDI: 0000000000000003
RBP: 0000000000008041 R08: 0000000000000001 R09: 0000000001140940
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000071a698
R13: 000000000071a698 R14: 0000000000000000 R15: 0000000000002710

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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