IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready
device hsr_slave_0 entered promiscuous mode
device hsr_slave_1 entered promiscuous mode
------------[ cut here ]------------
ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:4916
WARNING: CPU: 1 PID: 7089 at lib/debugobjects.c:329 debug_print_object+0x16a/0x210 lib/debugobjects.c:326
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 7089 Comm: kworker/u4:19 Not tainted 4.19.0-rc1+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1 04/01/2014
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x16e/0x22a lib/dump_stack.c:113
 panic+0x1c6/0x37d kernel/panic.c:184
 __warn.cold.8+0x120/0x16c kernel/panic.c:536
 report_bug+0x1a4/0x200 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993
RIP: 0010:debug_print_object+0x16a/0x210 lib/debugobjects.c:326
Code: 1d 88 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 92 00 00 00 48 8b 14 dd 80 e6 1d 88 4c 89 fe 48 c7 c7 20 dc 1d 88 e8 b6 1e dd fd <0f> 0b 83 05 f9 81 6a 06 01 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f
RSP: 0018:ffff88007149ee60 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000000008 RDI: ffffffff8ac61620
RBP: ffff88007149eea0 R08: ffffed000fd43ee3 R09: ffffed000fd43ee2
R10: ffffed000fd43ee2 R11: ffff88007ea1f717 R12: 0000000000000001
R13: ffffffff8919e8a0 R14: ffffffff81634f40 R15: ffffffff881de0c0
 __debug_check_no_obj_freed lib/debugobjects.c:786 [inline]
 debug_check_no_obj_freed+0x3ae/0x58d lib/debugobjects.c:818
 kfree+0xbd/0x230 mm/slab.c:3812
 kvfree+0x2c/0x30 mm/util.c:449
 netdev_freemem+0x47/0x60 net/core/dev.c:8842
 netdev_release+0x104/0x150 net/core/net-sysfs.c:1640
 device_release+0x74/0x1d0 drivers/base/core.c:891
 kobject_cleanup lib/kobject.c:662 [inline]
 kobject_release lib/kobject.c:691 [inline]
 kref_put include/linux/kref.h:70 [inline]
 kobject_put.cold.9+0x22e/0x281 lib/kobject.c:708
 netdev_run_todo+0x624/0x950 net/core/dev.c:8747
 rtnl_unlock+0x9/0x10 net/core/rtnetlink.c:117
 default_device_exit_batch+0x3db/0x520 net/core/dev.c:9528
 ops_exit_list.isra.7+0xd9/0x130 net/core/net_namespace.c:156
 cleanup_net+0x4b6/0xaa0 net/core/net_namespace.c:551
 process_one_work+0xadf/0x1a20 kernel/workqueue.c:2153
 worker_thread+0x176/0x12a0 kernel/workqueue.c:2296
 kthread+0x327/0x3f0 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413

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