===================================================== BUG: KMSAN: uninit-value in bond_neigh_setup+0xa4/0x110 drivers/net/bonding/bond_main.c:3745 CPU: 0 PID: 18847 Comm: udevd 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:kmsan_slab_free+0x8c/0xb0 mm/kmsan/kmsan_hooks.c:111 Code: 00 00 b9 03 00 00 00 e8 32 ea ff ff be ff ff ff ff 65 0f c1 35 a5 c8 97 52 ff ce 75 1a e8 9c 93 32 ff 4c 89 7d e0 ff 75 e0 9d <48> 83 c4 10 5b 41 5e 41 5f 5d c3 0f 0b 48 c7 c7 af 16 a7 ba 31 c0 RSP: 0018:ffffa69c4418fb60 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: f4448c54045dc600 RBX: ffff92362f8068c0 RCX: 0000000000000401 RDX: 0000000000000400 RSI: 0000000000000000 RDI: ffff9236bdb3d000 RBP: ffffa69c4418fb88 R08: ffffe465c000000f R09: ffff92362fffb000 R10: 000000000000000a R11: fffffffface63cc0 R12: 0000000000000000 R13: ffff9236bdb3d000 R14: ffff9236bdb3d000 R15: 0000000000000246 slab_free_freelist_hook mm/slub.c:1458 [inline] slab_free mm/slub.c:3021 [inline] kfree+0x8ce/0x3090 mm/slub.c:3974 kfree_link+0x37/0x40 fs/libfs.c:1128 do_delayed_call include/linux/delayed_call.h:28 [inline] vfs_readlink+0x43e/0x730 fs/namei.c:4745 do_readlinkat+0x406/0x520 fs/stat.c:411 __do_sys_readlink fs/stat.c:432 [inline] __se_sys_readlink+0x99/0xc0 fs/stat.c:429 __x64_sys_readlink+0x4a/0x70 fs/stat.c:429 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f48d703c577 Code: f0 ff ff 77 02 f3 c3 48 8b 15 bd 38 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 90 90 b8 59 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 91 38 2b 00 31 d2 48 29 c2 64 RSP: 002b:00007ffc33baf2e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000059 RAX: ffffffffffffffda RBX: 00007ffc33bafb20 RCX: 00007f48d703c577 RDX: 0000000000000400 RSI: 00007ffc33baf6f0 RDI: 00007ffc33baf2f0 RBP: 0000000000000200 R08: 000000000042033b R09: 00007f48d7090c20 R10: 7269762f73656369 R11: 0000000000000206 R12: 0000000000fa3e10 R13: 0000000000625500 R14: 0000000000f9e250 R15: 000000000000000b 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 =====================================================