------------[ cut here ]------------
WARNING: CPU: 2 PID: 3216 at lib/refcount.c:227 refcount_dec+0x4c/0x50 lib/refcount.c:227
Kernel panic - not syncing: panic_on_warn set ...

CPU: 2 PID: 3216 Comm: ip Not tainted 4.14.0-rc5-next-20171018+ #8
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:16 [inline]
 dump_stack+0x194/0x257 lib/dump_stack.c:52
 panic+0x1e4/0x41c kernel/panic.c:183
 __warn+0x1c4/0x1e0 kernel/panic.c:546
 report_bug+0x211/0x2d0 lib/bug.c:183
 fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:177
 do_trap_no_signal arch/x86/kernel/traps.c:211 [inline]
 do_trap+0x260/0x390 arch/x86/kernel/traps.c:260
 do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:297
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:310
 invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:refcount_dec+0x4c/0x50 lib/refcount.c:227
RSP: 0018:ffff8800388de600 EFLAGS: 00010282
RAX: 000000000000002c RBX: ffff8800683aa35c RCX: 0000000000000000
RDX: 000000000000002c RSI: 1ffff1000711bc80 RDI: ffffed000711bcb4
RBP: ffff8800388de608 R08: 0000000000000001 R09: 0000000000000000
R10: ffff8800388de4d0 R11: 0000000000000000 R12: 1ffff1000711bcc9
R13: ffff8800388de668 R14: ffff8800388de768 R15: ffff8800683aa35c
 __in6_ifa_put include/net/addrconf.h:369 [inline]
 ipv6_del_addr+0x42b/0xb60 net/ipv6/addrconf.c:1212
 addrconf_permanent_addr net/ipv6/addrconf.c:3331 [inline]
 addrconf_notify+0x1c66/0x2190 net/ipv6/addrconf.c:3397
 notifier_call_chain+0x136/0x2c0 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+0x32/0x60 net/core/dev.c:1697
 call_netdevice_notifiers net/core/dev.c:1715 [inline]
 __dev_notify_flags+0x15d/0x430 net/core/dev.c:6844
 dev_change_flags+0xf5/0x140 net/core/dev.c:6880
 do_setlink+0xa31/0x3b10 net/core/rtnetlink.c:2146
 rtnl_newlink+0xf0d/0x1a30 net/core/rtnetlink.c:2699
 rtnetlink_rcv_msg+0x733/0x1020 net/core/rtnetlink.c:4346
 netlink_rcv_skb+0x216/0x440 net/netlink/af_netlink.c:2409
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4358
 netlink_unicast_kernel net/netlink/af_netlink.c:1273 [inline]
 netlink_unicast+0x4e8/0x6f0 net/netlink/af_netlink.c:1299
 netlink_sendmsg+0xa4a/0xe60 net/netlink/af_netlink.c:1862
 sock_sendmsg_nosec net/socket.c:632 [inline]
 sock_sendmsg+0xca/0x110 net/socket.c:642
 ___sys_sendmsg+0x755/0x890 net/socket.c:2048
 __sys_sendmsg+0xe5/0x210 net/socket.c:2082
 SYSC_sendmsg net/socket.c:2093 [inline]
 SyS_sendmsg+0x2d/0x50 net/socket.c:2089
 entry_SYSCALL_64_fastpath+0x1f/0xbe
RIP: 0033:0x7fde2cbb0320
RSP: 002b:00007fff74b262e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fff74b2a3e0 RCX: 00007fde2cbb0320
RDX: 0000000000000000 RSI: 00007fff74b26320 RDI: 0000000000000013
RBP: 0000000000000082 R08: 0000000000000000 R09: feffffff00000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff74b2aba0
R13: 0000000000000000 R14: 00007fff74b2a3b8 R15: 00007fff74b2abb8
Dumping ftrace buffer:
   (ftrace buffer empty)
Kernel Offset: disabled
Rebooting in 86400 seconds..