=====================================
WARNING: bad unlock balance detected!
5.0.0-rc8-next-20190301 #1 Not tainted
-------------------------------------
kworker/0:0/7644 is trying to release lock (
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BUG: KASAN: slab-out-of-bounds in print_unlock_imbalance_bug kernel/locking/lockdep.c:3737 [inline]
BUG: KASAN: slab-out-of-bounds in print_unlock_imbalance_bug.cold+0x97/0x123 kernel/locking/lockdep.c:3722
Read of size 8 at addr ffff88809b616224 by task kworker/0:0/7644

CPU: 0 PID: 7644 Comm: kworker/0:0 Not tainted 5.0.0-rc8-next-20190301 #1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue:  addrconf_dad_work (ipv6_addrconf)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187
 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132
 print_unlock_imbalance_bug kernel/locking/lockdep.c:3737 [inline]
 print_unlock_imbalance_bug.cold+0x97/0x123 kernel/locking/lockdep.c:3722
 __lock_release kernel/locking/lockdep.c:3961 [inline]
 lock_release+0x67e/0xa00 kernel/locking/lockdep.c:4221
 process_one_work+0xa47/0x1790 kernel/workqueue.c:2276
 worker_thread+0x98/0xe40 kernel/workqueue.c:2415
 kthread+0x357/0x430 kernel/kthread.c:253
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352

Allocated by task 1:
 save_stack+0x45/0xd0 mm/kasan/common.c:75
 set_track mm/kasan/common.c:87 [inline]
 __kasan_kmalloc mm/kasan/common.c:497 [inline]
 __kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:470
 kasan_kmalloc+0x9/0x10 mm/kasan/common.c:511
 kmem_cache_alloc_trace+0x151/0x760 mm/slab.c:3621
 kmalloc include/linux/slab.h:548 [inline]
 kzalloc include/linux/slab.h:743 [inline]
 alloc_workqueue+0x7f9/0xe70 kernel/workqueue.c:4236
 addrconf_init+0x8c/0x3a3 net/ipv6/addrconf.c:6991
 inet6_init+0x36c/0x6e1 net/ipv6/af_inet6.c:1029
 do_one_initcall+0x109/0x796 init/main.c:901
 do_initcall_level init/main.c:969 [inline]
 do_initcalls init/main.c:977 [inline]
 do_basic_setup init/main.c:995 [inline]
 kernel_init_freeable+0x4da/0x5c9 init/main.c:1150
 kernel_init+0x12/0x1c5 init/main.c:1068
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352

Freed by task 0:
(stack is not available)

The buggy address belongs to the object at ffff88809b616000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 36 bytes to the right of
 512-byte region [ffff88809b616000, ffff88809b616200)
The buggy address belongs to the page:
page:ffffea00026d8580 count:1 mapcount:0 mapping:ffff88812c3f0940 index:0x0
flags: 0x1fffc0000000200(slab)
raw: 01fffc0000000200 ffffea00026ec048 ffffea000299c348 ffff88812c3f0940
raw: 0000000000000000 ffff88809b616000 0000000100000006 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809b616100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88809b616180: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
>ffff88809b616200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                               ^
 ffff88809b616280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88809b616300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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