bridge0: port 2(bridge_slave_1) entered disabled state
bridge_slave_0: left allmulticast mode
bridge_slave_0: left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
Increase LOCKDEP_CIRCULAR_QUEUE_BITS to avoid this warning:
------------[ cut here ]------------
lockdep bfs error:-1
WARNING: CPU: 0 PID: 37 at kernel/locking/lockdep.c:2059 print_bfs_bug+0x29/0x50 kernel/locking/lockdep.c:2059
Modules linked in:
CPU: 0 UID: 0 PID: 37 Comm: kworker/u8:2 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: netns cleanup_net
RIP: 0010:print_bfs_bug+0x29/0x50 kernel/locking/lockdep.c:2059
Code: 90 55 53 89 fb e8 a7 f3 17 03 89 c5 e8 00 a6 ff ff 85 ed 74 19 83 fb ff 74 1c 90 48 c7 c7 d2 b9 04 8d 89 de e8 a8 00 e7 ff 90 <0f> 0b 90 90 5b 5d c3 cc cc cc cc cc 48 c7 c7 c4 64 16 8d e8 4f 22
RSP: 0018:ffffc90000ac65a8 EFLAGS: 00010046
RAX: 5aefad37e3ac4c00 RBX: 00000000ffffffff RCX: ffff88801ceebb80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed1017104863 R12: ffffffff95b316a8
R13: ffffffff95b31718 R14: ffff88801ceec7b8 R15: 000000000000001f
FS:  0000000000000000(0000) GS:ffff8881268c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f05180435c0 CR3: 000000000d7a6000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 check_irq_usage kernel/locking/lockdep.c:-1 [inline]
 check_prev_add kernel/locking/lockdep.c:3169 [inline]
 check_prevs_add kernel/locking/lockdep.c:3284 [inline]
 validate_chain+0x1a4b/0x2140 kernel/locking/lockdep.c:3908
 __lock_acquire+0xab9/0xd20 kernel/locking/lockdep.c:5237
 lock_acquire+0x120/0x360 kernel/locking/lockdep.c:5868
 _raw_spin_lock_nested+0x32/0x50 kernel/locking/spinlock.c:378
 raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:636
 raw_spin_rq_lock kernel/sched/sched.h:1519 [inline]
 rq_lock kernel/sched/sched.h:1841 [inline]
 ttwu_queue kernel/sched/core.c:4002 [inline]
 try_to_wake_up+0x635/0x12b0 kernel/sched/core.c:4328
 swake_up_locked kernel/sched/swait.c:30 [inline]
 swake_up_one+0x70/0x140 kernel/sched/swait.c:53
 rcu_report_unblock_qs_rnp kernel/rcu/tree.c:2414 [inline]
 rcu_preempt_deferred_qs_irqrestore+0xa11/0xce0 kernel/rcu/tree_plugin.h:571
 rcu_read_unlock_special+0x35b/0x470 kernel/rcu/tree_plugin.h:773
 __rcu_read_unlock+0x84/0xe0 kernel/rcu/tree_plugin.h:438
 rcu_read_unlock include/linux/rcupdate.h:873 [inline]
 class_rcu_destructor include/linux/rcupdate.h:1155 [inline]
 unwind_next_frame+0x19ae/0x2390 arch/x86/kernel/unwind_orc.c:680
 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:330 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:356
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4180 [inline]
 slab_alloc_node mm/slub.c:4229 [inline]
 kmem_cache_alloc_noprof+0x143/0x310 mm/slub.c:4236
 kmem_alloc_batch lib/debugobjects.c:371 [inline]
 fill_pool+0x100/0x570 lib/debugobjects.c:403
 debug_objects_fill_pool+0x107/0x120 lib/debugobjects.c:725
 debug_object_activate+0x6c/0x3a0 lib/debugobjects.c:814
 debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
 __call_rcu_common kernel/rcu/tree.c:3108 [inline]
 call_rcu+0xaa/0x9c0 kernel/rcu/tree.c:3243
 fib_table_flush+0x99f/0x11a0 net/ipv4/fib_trie.c:2070
 fib_flush net/ipv4/fib_frontend.c:195 [inline]
 fib_disable_ip+0xfd/0x170 net/ipv4/fib_frontend.c:1455
 fib_netdev_event+0x318/0x490 net/ipv4/fib_frontend.c:-1
 notifier_call_chain+0x1b6/0x3e0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
 call_netdevice_notifiers net/core/dev.c:2281 [inline]
 netif_close_many+0x29c/0x410 net/core/dev.c:1784
 unregister_netdevice_many_notify+0x7b9/0x1fe0 net/core/dev.c:12136
 ops_exit_rtnl_list net/core/net_namespace.c:186 [inline]
 ops_undo_list+0x3dc/0x990 net/core/net_namespace.c:247
 cleanup_net+0x4cb/0x800 net/core/net_namespace.c:682
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>