===================================================== BUG: KMSAN: uninit-value in bond_neigh_setup+0xa4/0x110 drivers/net/bonding/bond_main.c:3745 CPU: 0 PID: 13441 Comm: syz-executor.5 Not tainted 5.5.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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] 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 RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:190 Code: 00 00 4c 89 63 08 44 89 ab 90 0c 00 00 4c 89 ff 4c 89 f6 e8 32 38 65 00 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc cc cc <48> 8b 04 24 65 48 8b 14 25 00 2d 03 00 65 8b 0d a8 da 1e 59 f7 c1 RSP: 0018:ffffa5984506fa90 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffe0d1096ecef0 RDX: ffff8e29d1b63050 RSI: 0000000000000000 RDI: ffff8e2aa2f63050 RBP: ffffa5984506fb48 R08: ffffe0d10000000f R09: ffff8e29efffb000 R10: 0000000000000004 R11: 0000000000000000 R12: 000000000000000a R13: 0000000000000000 R14: 000000000007ffff R15: 00000000000d8c15 dccp_v6_exit_batch+0x31/0x40 net/dccp/ipv6.c:1114 ops_exit_list net/core/net_namespace.c:175 [inline] setup_net+0xcca/0x12a0 net/core/net_namespace.c:358 copy_net_ns+0x551/0xa70 net/core/net_namespace.c:476 create_new_namespaces+0x8d8/0xe30 kernel/nsproxy.c:103 unshare_nsproxy_namespaces+0x25e/0x340 kernel/nsproxy.c:202 ksys_unshare+0x883/0x1110 kernel/fork.c:2937 __do_sys_unshare kernel/fork.c:3005 [inline] __se_sys_unshare+0x41/0x60 kernel/fork.c:3003 __x64_sys_unshare+0x32/0x50 kernel/fork.c:3003 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:00007f7a9d266c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000045a919 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000060040000 RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f7a9d2676d4 R13: 00000000004cb42c R14: 00000000004e4d20 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 =====================================================