===================================================== BUG: KMSAN: uninit-value in bond_neigh_setup+0xa4/0x110 drivers/net/bonding/bond_main.c:3745 CPU: 0 PID: 12138 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: __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:copy_one_pte mm/memory.c:785 [inline] RIP: 0010:copy_pte_range mm/memory.c:842 [inline] RIP: 0010:copy_pmd_range mm/memory.c:893 [inline] RIP: 0010:copy_pud_range mm/memory.c:927 [inline] RIP: 0010:copy_p4d_range mm/memory.c:949 [inline] RIP: 0010:copy_page_range+0x2a3c/0x39a0 mm/memory.c:1011 Code: 9d 49 83 e4 9d 48 89 c7 48 89 ce 41 83 e6 08 41 83 e7 08 44 89 f0 f7 d0 41 85 c7 0f 94 c0 48 89 f9 4c 09 e9 48 89 f2 4c 31 e2 <48> 09 ca 41 c0 ee 03 4d 85 ff 4c 0f 44 ef 49 0f 45 f4 41 84 c6 4c RSP: 0018:ffffab49c3aef690 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 00000000ffffff00 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 8000000019254007 RDI: 0000000000000000 RBP: ffffab49c3aef978 R08: ffffda48c0000000 R09: ffff90c26fffb000 R10: 0000000000000000 R11: 00007fd58cb59fff R12: 8000000019254007 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000008 dup_mmap+0x1510/0x1d60 kernel/fork.c:605 dup_mm+0x1f2/0x710 kernel/fork.c:1362 copy_mm kernel/fork.c:1418 [inline] copy_process+0x43af/0x9720 kernel/fork.c:2074 _do_fork+0x255/0xfa0 kernel/fork.c:2423 __do_sys_clone kernel/fork.c:2578 [inline] __se_sys_clone+0x35b/0x3a0 kernel/fork.c:2559 __x64_sys_clone+0x62/0x80 kernel/fork.c:2559 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x458eea Code: f7 d8 64 89 04 25 d4 02 00 00 64 4c 8b 0c 25 10 00 00 00 31 d2 4d 8d 91 d0 02 00 00 31 f6 bf 11 00 20 01 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 f5 00 00 00 85 c0 41 89 c5 0f 85 fc 00 00 RSP: 002b:0000000000a6fd60 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000a6fd60 RCX: 0000000000458eea RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 0000000000a6fda0 R08: 0000000000000001 R09: 0000000000b6c940 R10: 0000000000b6cc10 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000a6fdf0 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 =====================================================