------------[ cut here ]------------
IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready
IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready
ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:4916
IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready
WARNING: CPU: 1 PID: 17665 at lib/debugobjects.c:325 debug_print_object+0x16a/0x250 lib/debugobjects.c:325
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 17665 Comm: kworker/u4:6 Not tainted 4.19.35 #3
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x172/0x1f0 lib/dump_stack.c:113
 panic+0x263/0x51d kernel/panic.c:185
 __warn.cold+0x20/0x54 kernel/panic.c:540
 report_bug+0x263/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x204/0x360 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:997
RIP: 0010:debug_print_object+0x16a/0x250 lib/debugobjects.c:325
Code: dd 60 ad 81 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd 60 ad 81 87 48 c7 c7 00 a3 81 87 e8 54 61 1a fe <0f> 0b 83 05 99 bc 16 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3
RSP: 0018:ffff88805a3df838 EFLAGS: 00010086
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8155cf26 RDI: ffffed100b47bef9
RBP: ffff88805a3df878 R08: ffff888088640280 R09: fffffbfff10f2619
R10: fffffbfff10f2618 R11: ffffffff887930c3 R12: 0000000000000001
R13: ffffffff887aa540 R14: ffffffff815b3fd0 R15: ffff8880639eab60
 __debug_check_no_obj_freed lib/debugobjects.c:785 [inline]
 debug_check_no_obj_freed+0x29f/0x464 lib/debugobjects.c:817
 kfree+0xbd/0x230 mm/slab.c:3821
 kvfree+0x61/0x70 mm/util.c:452
 netdev_freemem+0x4c/0x60 net/core/dev.c:8883
 netdev_release+0x86/0xb0 net/core/net-sysfs.c:1645
 device_release+0x7d/0x210 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+0x28f/0x2ec lib/kobject.c:708
 netdev_run_todo+0x5cc/0x7d0 net/core/dev.c:8788
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:117
 default_device_exit_batch+0x35a/0x410 net/core/dev.c:9569
 ops_exit_list.isra.0+0x105/0x160 net/core/net_namespace.c:156
 cleanup_net+0x3fb/0x960 net/core/net_namespace.c:552
 process_one_work+0x98e/0x1760 kernel/workqueue.c:2153
 worker_thread+0x98/0xe40 kernel/workqueue.c:2296
 kthread+0x357/0x430 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413

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