BUG: KMSAN: uninit-value in bond_neigh_setup+0xa4/0x110 drivers/net/bonding/bond_main.c:3745 CPU: 0 PID: 15721 Comm: kworker/0:3 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ipv6_addrconf addrconf_dad_work Call Trace: __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] ndisc_send_skb+0x1083/0x15e0 net/ipv6/ndisc.c:505 ndisc_send_ns+0xb9b/0xc00 net/ipv6/ndisc.c:647 addrconf_dad_work+0x1dea/0x2ac0 net/ipv6/addrconf.c:4120 process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2264 worker_thread+0x111b/0x2460 kernel/workqueue.c:2410 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:353 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 =====================================================