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BUG: KMSAN: uninit-value in bond_neigh_setup+0xa4/0x110 drivers/net/bonding/bond_main.c:3745
CPU: 0 PID: 20158 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_get_metadata+0x12a/0x190 mm/kmsan/kmsan_shadow.c:202
Code: 84 f6 48 0f 45 c2 48 01 c8 49 63 cf 48 03 04 cd 80 de 6f 9c 75 62 48 89 df e8 72 00 00 00 48 85 c0 74 53 48 89 c1 48 8b 50 40 <31> c0 48 85 d2 74 47 89 d6 83 e6 01 48 85 f6 75 3d 48 8b 41 48 48
RSP: 0018:ffff9dd0d81ee6a8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: fffff653c75b83b0 RBX: ffff9b61b8b3fa04 RCX: fffff653c75b83b0
RDX: fffff653c84bfb10 RSI: 00000000000005e0 RDI: ffff9b61b8b3fa04
RBP: ffff9dd0d81ee6c0 R08: fffff653c000000f R09: ffff9b61685fb000
R10: 0000000000000004 R11: 0000000000000001 R12: 0000000000000000
R13: 00000000fffffffe R14: 0000000000000000 R15: 0000000000000000
 kmsan_get_shadow_origin_ptr+0x6c/0xb0 mm/kmsan/kmsan_shadow.c:154
 __msan_metadata_ptr_for_store_1+0x13/0x20 mm/kmsan/kmsan_instr.c:52
 string_nocheck lib/vsprintf.c:611 [inline]
 string+0x49a/0x600 lib/vsprintf.c:689
 vsnprintf+0x218f/0x3210 lib/vsprintf.c:2574
 sprintf+0x210/0x260 lib/vsprintf.c:2776
 alloc_uevent_skb+0x257/0x430 lib/kobject_uevent.c:295
 uevent_net_broadcast_tagged lib/kobject_uevent.c:350 [inline]
 kobject_uevent_net_broadcast lib/kobject_uevent.c:411 [inline]
 kobject_uevent_env+0x1729/0x2900 lib/kobject_uevent.c:592
 kobject_uevent+0x6f/0x80 lib/kobject_uevent.c:641
 netdev_queue_add_kobject net/core/net-sysfs.c:1479 [inline]
 netdev_queue_update_kobjects+0x321/0x760 net/core/net-sysfs.c:1496
 register_queue_kobjects net/core/net-sysfs.c:1538 [inline]
 netdev_register_kobject+0x5e6/0x720 net/core/net-sysfs.c:1756
 register_netdevice+0x25da/0x31b0 net/core/dev.c:9316
 veth_newlink+0x1104/0x1440 drivers/net/veth.c:1308
 __rtnl_newlink net/core/rtnetlink.c:3305 [inline]
 rtnl_newlink+0x2a8a/0x3a90 net/core/rtnetlink.c:3363
 rtnetlink_rcv_msg+0x115a/0x1580 net/core/rtnetlink.c:5424
 netlink_rcv_skb+0x431/0x620 net/netlink/af_netlink.c:2477
 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5442
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0xfa0/0x1100 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x11f0/0x1480 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:639 [inline]
 sock_sendmsg net/socket.c:659 [inline]
 ____sys_sendmsg+0x1362/0x13f0 net/socket.c:2330
 ___sys_sendmsg net/socket.c:2384 [inline]
 __sys_sendmsg+0x4f0/0x5e0 net/socket.c:2417
 __do_sys_sendmsg net/socket.c:2426 [inline]
 __se_sys_sendmsg+0x97/0xb0 net/socket.c:2424
 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2424
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45a919
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fc75aeeac78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045a919
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000005
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc75aeeb6d4
R13: 00000000004c9a29 R14: 00000000004e1930 R15: 00000000ffffffff

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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