list_add corruption. prev->next should be next (ffffffff8a1dca60), but was ffff8881bddb2bb0. (prev=ffff8881c69d3930).
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:28!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3727 Comm: udevd Not tainted 4.20.0-rc6-next-20181210+ #164
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__list_add_valid.cold.2+0x23/0x2a lib/list_debug.c:26
Code: e8 00 1f d2 fd 0f 0b 48 89 d9 48 c7 c7 20 e6 80 88 e8 ef 1e d2 fd 0f 0b 48 89 f1 48 c7 c7 a0 e6 80 88 48 89 de e8 db 1e d2 fd <0f> 0b 90 90 90 90 90 55 48 89 e5 41 57 41 56 49 be 00 00 00 00 00
RSP: 0018:ffff8881dad06ce0 EFLAGS: 00010286
kobject: 'loop0' (00000000b1bfbc42): kobject_uevent_env
RAX: 0000000000000075 RBX: ffffffff8a1dca60 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816621c5 RDI: 0000000000000005
RBP: ffff8881dad06cf8 R08: ffff8881c2eac400 R09: ffffed103b5a5020
R10: ffffed103b5a5020 R11: ffff8881dad28107 R12: ffff88818639f470
R13: ffff88818639f200 R14: ffffffff8a1dc820 R15: ffffffff8a1dcab0
FS:  00007f75363b47a0(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000
kobject: 'loop0' (00000000b1bfbc42): fill_kobj_path: path = '/devices/virtual/block/loop0'
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f75363bb000 CR3: 00000001c2c9e000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 __list_add include/linux/list.h:60 [inline]
 list_add_tail include/linux/list.h:93 [inline]
 neigh_alloc net/core/neighbour.c:395 [inline]
 ___neigh_create+0x14b7/0x2600 net/core/neighbour.c:553
 __neigh_create+0x30/0x40 net/core/neighbour.c:640
 ip6_finish_output2+0xa64/0x2940 net/ipv6/ip6_output.c:117
 ip6_finish_output+0x58c/0xc60 net/ipv6/ip6_output.c:154
 NF_HOOK_COND include/linux/netfilter.h:278 [inline]
 ip6_output+0x232/0x9d0 net/ipv6/ip6_output.c:171
 dst_output include/net/dst.h:444 [inline]
 NF_HOOK include/linux/netfilter.h:289 [inline]
 ndisc_send_skb+0x1005/0x1560 net/ipv6/ndisc.c:491
 ndisc_send_rs+0x134/0x6e0 net/ipv6/ndisc.c:685
 addrconf_rs_timer+0x314/0x690 net/ipv6/addrconf.c:3840
 call_timer_fn+0x272/0x920 kernel/time/timer.c:1325
 expire_timers kernel/time/timer.c:1362 [inline]
 __run_timers+0x7e5/0xc70 kernel/time/timer.c:1681
 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694
 __do_softirq+0x308/0xb7e kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x17f/0x1c0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:536 [inline]
 smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:__put_user_4+0x0/0x30 arch/x86/lib/putuser.S:59
Code: ee 01 00 48 8b 9b 18 14 00 00 48 83 eb 01 48 39 d9 73 6c 0f 1f 00 66 89 01 31 c0 0f 1f 00 c3 90 66 2e 0f 1f 84 00 00 00 00 00 <65> 48 8b 1c 25 40 ee 01 00 48 8b 9b 18 14 00 00 48 83 eb 03 48 39
RSP: 0018:ffff8881c2eb7b58 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000010 RBX: 0000000000000000 RCX: 00007fff84b6890c
RDX: 0000000000000000 RSI: ffffffff81b2eda3 RDI: 0000000000000282
RBP: ffff8881c2eb7c08 R08: 1ffff110385d6f48 R09: 0000000000000008
R10: 0000000000000001 R11: ffff8881c2eac400 R12: ffff8881c3e02a88
R13: 0000000000000010 R14: 0000000000000010 R15: dffffc0000000000
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:509 [inline]
 do_vfs_ioctl+0x1de/0x1790 fs/ioctl.c:696
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:713
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f7535ac1347
Code: 90 90 90 48 8b 05 f1 fa 2a 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 90 90 90 90 90 90 90 90 90 90 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c1 fa 2a 00 31 d2 48 29 c2 64
RSP: 002b:00007fff84b68888 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000006254a0 RCX: 00007f7535ac1347
RDX: 00007fff84b6890c RSI: 000000000000541b RDI: 0000000000000006
RBP: 00000000009087c0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000002e59
R13: 0000000000000000 R14: 0000000000907860 R15: 0000000000903250
Modules linked in:
---[ end trace e048a3d280d7bb54 ]---
RIP: 0010:__list_add_valid.cold.2+0x23/0x2a lib/list_debug.c:26
Code: e8 00 1f d2 fd 0f 0b 48 89 d9 48 c7 c7 20 e6 80 88 e8 ef 1e d2 fd 0f 0b 48 89 f1 48 c7 c7 a0 e6 80 88 48 89 de e8 db 1e d2 fd <0f> 0b 90 90 90 90 90 55 48 89 e5 41 57 41 56 49 be 00 00 00 00 00
RSP: 0018:ffff8881dad06ce0 EFLAGS: 00010286
RAX: 0000000000000075 RBX: ffffffff8a1dca60 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff816621c5 RDI: 0000000000000005
RBP: ffff8881dad06cf8 R08: ffff8881c2eac400 R09: ffffed103b5a5020
R10: ffffed103b5a5020 R11: ffff8881dad28107 R12: ffff88818639f470
R13: ffff88818639f200 R14: ffffffff8a1dc820 R15: ffffffff8a1dcab0
FS:  00007f75363b47a0(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f75363bb000 CR3: 00000001c2c9e000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400