device bridge_slave_0 entered promiscuous mode
------------[ cut here ]------------
bridge0: port 2(bridge_slave_1) entered blocking state
bridge0: port 2(bridge_slave_1) entered disabled state
ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x90 kernel/workqueue.c:4941
WARNING: CPU: 0 PID: 8159 at lib/debugobjects.c:325 debug_print_object+0x168/0x250 lib/debugobjects.c:325
device bridge_slave_1 entered promiscuous mode
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 8159 Comm: kworker/u4:5 Not tainted 4.19.101-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
bond0: Enslaving bond_slave_0 as an active interface with an up link
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x197/0x210 lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
bond0: Enslaving bond_slave_1 as an active interface with an up link
IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready
team0: Port device team_slave_0 added
IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready
 __warn.cold+0x20/0x53 kernel/panic.c:541
team0: Port device team_slave_1 added
batman_adv: batadv0: Adding interface: batadv_slave_0
 report_bug+0x263/0x2b0 lib/bug.c:186
batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
 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
batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active
batman_adv: batadv0: Adding interface: batadv_slave_1
batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem.
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1037
RIP: 0010:debug_print_object+0x168/0x250 lib/debugobjects.c:325
Code: dd a0 09 eb 87 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 b5 00 00 00 48 8b 14 dd a0 09 eb 87 48 c7 c7 e0 fe ea 87 e8 16 9b d4 fd <0f> 0b 83 05 cb 83 63 06 01 48 83 c4 20 5b 41 5c 41 5d 41 5e 5d c3
RSP: 0018:ffff88804dc27830 EFLAGS: 00010082
batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready
RDX: 0000000000000000 RSI: ffffffff81558136 RDI: ffffed1009b84ef8
RBP: ffff88804dc27870 R08: ffff88804dc1a280 R09: ffffed1015d03ee3
R10: ffffed1015d03ee2 R11: ffff8880ae81f717 R12: 0000000000000001
R13: ffffffff88fa05a0 R14: ffffffff815af720 R15: ffff88804c3366e0
IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready
 __debug_check_no_obj_freed lib/debugobjects.c:785 [inline]
 debug_check_no_obj_freed+0x29f/0x464 lib/debugobjects.c:817
 kfree+0xbd/0x220 mm/slab.c:3821
 kvfree+0x61/0x70 mm/util.c:452
 netdev_freemem+0x4c/0x60 net/core/dev.c:9076
 netdev_release+0x86/0xb0 net/core/net-sysfs.c:1654
 device_release+0x7b/0x210 drivers/base/core.c:926
 kobject_cleanup lib/kobject.c:662 [inline]
 kobject_release lib/kobject.c:691 [inline]
 kref_put include/linux/kref.h:70 [inline]
 kobject_put+0x193/0x290 lib/kobject.c:708
 netdev_run_todo+0x53b/0x7a0 net/core/dev.c:8981
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:117
 default_device_exit_batch+0x358/0x410 net/core/dev.c:9766
 ops_exit_list.isra.0+0xfc/0x150 net/core/net_namespace.c:156
 cleanup_net+0x404/0x960 net/core/net_namespace.c:553
 process_one_work+0x989/0x1750 kernel/workqueue.c:2153
 worker_thread+0x98/0xe40 kernel/workqueue.c:2296
 kthread+0x354/0x420 kernel/kthread.c:246
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415

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