bond2 (unregistering): Released all slaves
bond1 (unregistering): (slave bridge2): Releasing backup interface
bond1 (unregistering): (slave bridge1): Releasing backup interface
bond1 (unregistering): Released all slaves
------------[ cut here ]------------
WARNING: CPU: 0 PID: 22761 at drivers/net/ipvlan/ipvlan_l3s.c:148 ipvlan_unregister_nf_hook+0x2bb/0x2f0 drivers/net/ipvlan/ipvlan_l3s.c:148
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 22761 Comm: kworker/u4:5 Not tainted 5.6.0-rc2-syzkaller #0
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+0x197/0x210 lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:221
 __warn.cold+0x2f/0x3e kernel/panic.c:582
 report_bug+0x289/0x300 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 fixup_bug arch/x86/kernel/traps.c:169 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267
 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:ipvlan_unregister_nf_hook+0x2bb/0x2f0 drivers/net/ipvlan/ipvlan_l3s.c:148
Code: fc 48 c7 c2 60 b7 be 88 be 2d 00 00 00 48 c7 c7 a0 b8 be 88 c6 05 1d 80 e7 05 01 e8 f4 0d a2 fc e9 2a fe ff ff e8 15 15 bc fc <0f> 0b e9 f1 fe ff ff 4c 89 ef e8 96 ba fa fc e9 b6 fe ff ff e8 ac
RSP: 0018:ffffc90005707908 EFLAGS: 00010293
RAX: ffff8880669c02c0 RBX: 0000000000000000 RCX: ffffffff84b97182
RDX: 0000000000000000 RSI: ffffffff84b972ab RDI: 0000000000000005
RBP: ffffc90005707928 R08: ffff8880669c02c0 R09: ffff8880669c0b50
R10: fffffbfff154b600 R11: ffffffff8aa5b007 R12: ffff888068e200c0
R13: ffff88809d011700 R14: ffff888096c23000 R15: ffffc90005707ab0
 ipvlan_l3s_unregister+0xb4/0x160 drivers/net/ipvlan/ipvlan_l3s.c:221
 ipvlan_port_destroy drivers/net/ipvlan/ipvlan_main.c:97 [inline]
 ipvlan_uninit+0x42c/0x540 drivers/net/ipvlan/ipvlan_main.c:161
 rollback_registered_many+0xa06/0x1030 net/core/dev.c:8825
 unregister_netdevice_many.part.0+0x1b/0x1f0 net/core/dev.c:9964
 unregister_netdevice_many net/core/dev.c:9963 [inline]
 default_device_exit_batch+0x360/0x420 net/core/dev.c:10440
 ops_exit_list.isra.0+0x10c/0x160 net/core/net_namespace.c:175
 cleanup_net+0x549/0xb10 net/core/net_namespace.c:589
 process_one_work+0xa05/0x17a0 kernel/workqueue.c:2264
 worker_thread+0x98/0xe40 kernel/workqueue.c:2410
 kthread+0x361/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..