list_del corruption. next->prev should be ffff8881b2a1f8f0, but was ffff8881cccbaff0
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:56!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 13067 Comm: syz-executor3 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_del_entry_valid.cold.1+0x37/0x4a lib/list_debug.c:54
Code: e8 36 1f d2 fd 0f 0b 4c 89 ea 48 89 de 48 c7 c7 60 e4 80 88 e8 22 1f d2 fd 0f 0b 48 89 de 48 c7 c7 c0 e5 80 88 e8 11 1f d2 fd <0f> 0b 48 89 de 48 c7 c7 60 e5 80 88 e8 00 1f d2 fd 0f 0b 48 89 d9
RSP: 0018:ffff8881d326f368 EFLAGS: 00010286
RAX: 0000000000000054 RBX: ffff8881b2a1f8f0 RCX: ffffc9000be0a000
RDX: 0000000000000000 RSI: ffffffff816621c5 RDI: 0000000000000005
RBP: ffff8881d326f380 R08: ffff8881c5fc01c0 R09: ffffed103b5a5020
R10: ffffed103b5a5020 R11: ffff8881dad28107 R12: ffff8881d75bd030
R13: ffffffff8a1dca60 R14: ffff8881d326f488 R15: 1ffff1103a64de79
FS:  00007f297b97b700(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33a24000 CR3: 0000000194f97000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __list_del_entry include/linux/list.h:117 [inline]
 list_del_init include/linux/list.h:159 [inline]
 neigh_mark_dead+0x13b/0x410 net/core/neighbour.c:125
 neigh_flush_dev+0x3a1/0x960 net/core/neighbour.c:290
 neigh_changeaddr+0x31/0x40 net/core/neighbour.c:319
 ndisc_netdev_event+0xe6/0x5b0 net/ipv6/ndisc.c:1770
 notifier_call_chain+0x17e/0x380 kernel/notifier.c:93
 __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401
 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1737
 call_netdevice_notifiers_extack net/core/dev.c:1749 [inline]
 call_netdevice_notifiers net/core/dev.c:1763 [inline]
 dev_set_mac_address+0x293/0x3b0 net/core/dev.c:7780
 dev_ifsioc+0x508/0xa80 net/core/dev_ioctl.c:249
 dev_ioctl+0x1b5/0xcc0 net/core/dev_ioctl.c:488
 sock_do_ioctl+0x1f6/0x420 net/socket.c:974
kobject: 'loop5' (000000005a99966c): kobject_uevent_env
 sock_ioctl+0x313/0x690 net/socket.c:1075
kobject: 'loop5' (000000005a99966c): fill_kobj_path: path = '/devices/virtual/block/loop5'
 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: 0033:0x457679
Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f297b97ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457679
RDX: 0000000020000000 RSI: 0000000000008924 RDI: 0000000000000006
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f297b97b6d4
R13: 00000000004c257f R14: 00000000004d4498 R15: 00000000ffffffff
Modules linked in:
---[ end trace b892126e3f1eb0dc ]---
RIP: 0010:__list_del_entry_valid.cold.1+0x37/0x4a lib/list_debug.c:54
Code: e8 36 1f d2 fd 0f 0b 4c 89 ea 48 89 de 48 c7 c7 60 e4 80 88 e8 22 1f d2 fd 0f 0b 48 89 de 48 c7 c7 c0 e5 80 88 e8 11 1f d2 fd <0f> 0b 48 89 de 48 c7 c7 60 e5 80 88 e8 00 1f d2 fd 0f 0b 48 89 d9
RSP: 0018:ffff8881d326f368 EFLAGS: 00010286
RAX: 0000000000000054 RBX: ffff8881b2a1f8f0 RCX: ffffc9000be0a000
RDX: 0000000000000000 RSI: ffffffff816621c5 RDI: 0000000000000005
RBP: ffff8881d326f380 R08: ffff8881c5fc01c0 R09: ffffed103b5a5020
R10: ffffed103b5a5020 R11: ffff8881dad28107 R12: ffff8881d75bd030
R13: ffffffff8a1dca60 R14: ffff8881d326f488 R15: 1ffff1103a64de79
FS:  00007f297b97b700(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b33a24000 CR3: 0000000194f97000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400