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BUG: KASAN: slab-out-of-bounds in __list_del_entry_valid+0xf1/0x100 lib/list_debug.c:51
Read of size 8 at addr ffff8881cdc3b930 by task kworker/1:4/6415

CPU: 1 PID: 6415 Comm: kworker/1:4 Not tainted 4.20.0-rc6-next-20181210+ #164
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_power_efficient neigh_periodic_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x244/0x39d lib/dump_stack.c:113
 print_address_description.cold.4+0x9/0x1ff mm/kasan/report.c:187
 kasan_report.cold.5+0x1b/0x39 mm/kasan/report.c:317
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:135
 __list_del_entry_valid+0xf1/0x100 lib/list_debug.c:51
 __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_periodic_work+0x89a/0xc30 net/core/neighbour.c:905
 process_one_work+0xc90/0x1c40 kernel/workqueue.c:2153
 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352

Allocated by task 22298:
 save_stack+0x43/0xd0 mm/kasan/common.c:73
 set_track mm/kasan/common.c:85 [inline]
 kasan_kmalloc+0xcb/0xd0 mm/kasan/common.c:482
 __do_kmalloc mm/slab.c:3709 [inline]
 __kmalloc+0x15d/0x760 mm/slab.c:3718
 kmalloc include/linux/slab.h:550 [inline]
 kzalloc include/linux/slab.h:740 [inline]
 __register_sysctl_table+0xc7/0xfb0 fs/proc/proc_sysctl.c:1307
 register_net_sysctl+0x29/0x30 net/sysctl_net.c:120
 neigh_sysctl_register+0x399/0x730 net/core/neighbour.c:3430
 addrconf_sysctl_register+0xb9/0x1e0 net/ipv6/addrconf.c:6790
 ipv6_add_dev+0xa86/0x13a0 net/ipv6/addrconf.c:446
 addrconf_notify+0x9fb/0x2770 net/ipv6/addrconf.c:3452
 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]
 register_netdevice+0xb7d/0x11a0 net/core/dev.c:8620
 bond_newlink+0x49/0xa0 drivers/net/bonding/bond_netlink.c:453
 __rtnl_newlink+0x11e8/0x19e0 net/core/rtnetlink.c:3182
 rtnl_newlink+0x6b/0xa0 net/core/rtnetlink.c:3240
 rtnetlink_rcv_msg+0x46a/0xc20 net/core/rtnetlink.c:4969
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2477
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4987
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:632
 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2117
 __sys_sendmsg+0x11d/0x280 net/socket.c:2155
 __do_sys_sendmsg net/socket.c:2164 [inline]
 __se_sys_sendmsg net/socket.c:2162 [inline]
 __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe

Freed by task 6067:
 save_stack+0x43/0xd0 mm/kasan/common.c:73
 set_track mm/kasan/common.c:85 [inline]
 __kasan_slab_free+0x102/0x150 mm/kasan/common.c:444
 kasan_slab_free+0xe/0x10 mm/kasan/common.c:452
 __cache_free mm/slab.c:3485 [inline]
 kfree+0xcf/0x230 mm/slab.c:3804
 __rcu_reclaim kernel/rcu/rcu.h:233 [inline]
 rcu_do_batch kernel/rcu/tree.c:2452 [inline]
 invoke_rcu_callbacks kernel/rcu/tree.c:2773 [inline]
 rcu_process_callbacks+0xd91/0x15f0 kernel/rcu/tree.c:2754
 __do_softirq+0x308/0xb7e kernel/softirq.c:292

The buggy address belongs to the object at ffff8881cdc3b6c0
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 624 bytes inside of
 1024-byte region [ffff8881cdc3b6c0, ffff8881cdc3bac0)
The buggy address belongs to the page:
page:ffffea0007370e80 count:1 mapcount:0 mapping:ffff8881da800ac0 index:0x0 compound_mapcount: 0
flags: 0x2fffc0000010200(slab|head)
raw: 02fffc0000010200 ffffea000714e588 ffffea000739b788 ffff8881da800ac0
raw: 0000000000000000 ffff8881cdc3a040 0000000100000007 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881cdc3b800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881cdc3b880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881cdc3b900: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                     ^
 ffff8881cdc3b980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881cdc3ba00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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