veth0_vlan: left promiscuous mode
veth1_macvtap: left promiscuous mode
veth0_macvtap: left promiscuous mode
veth1_vlan: left promiscuous mode
veth0_vlan: left promiscuous mode
Increase LOCKDEP_CIRCULAR_QUEUE_BITS to avoid this warning:
------------[ cut here ]------------
lockdep bfs error:-1
WARNING: CPU: 0 PID: 1150 at kernel/locking/lockdep.c:2059 print_bfs_bug+0x29/0x50 kernel/locking/lockdep.c:2059
Modules linked in:
CPU: 0 UID: 0 PID: 1150 Comm: kworker/u8:6 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: netns cleanup_net
RIP: 0010:print_bfs_bug+0x29/0x50 kernel/locking/lockdep.c:2059
Code: 90 55 53 89 fb e8 a7 d6 e0 02 89 c5 e8 00 a6 ff ff 85 ed 74 19 83 fb ff 74 1c 90 48 c7 c7 6b 7b e7 8c 89 de e8 88 da e6 ff 90 <0f> 0b 90 90 5b 5d c3 cc cc cc cc cc 48 c7 c7 6e cb f8 8c e8 8f e0
RSP: 0018:ffffc90004cc67e0 EFLAGS: 00010046
RAX: ae4328f7f3273a00 RBX: 00000000ffffffff RCX: ffff888026745a00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed101710487b R12: ffffffff958aad18
R13: ffffffff958aad88 R14: ffff888026746718 R15: 000000000000001c
FS:  0000000000000000(0000) GS:ffff888126bc8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b74267b138 CR3: 000000000d5a6000 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:638
 raw_spin_rq_lock kernel/sched/sched.h:1546 [inline]
 __task_rq_lock+0xc1/0x470 kernel/sched/core.c:714
 ttwu_runnable kernel/sched/core.c:3765 [inline]
 try_to_wake_up+0x102/0x12b0 kernel/sched/core.c:4211
 rt_mutex_wake_up_q kernel/locking/rtmutex.c:566 [inline]
 rt_mutex_slowunlock+0x5ae/0x8a0 kernel/locking/rtmutex.c:1469
 spin_unlock_bh include/linux/spinlock_rt.h:110 [inline]
 fib6_nh_flush_exceptions+0x2c9/0x370 net/ipv6/route.c:1809
 fib6_purge_rt+0x4e/0x910 net/ipv6/ip6_fib.c:1037
 fib6_del_route net/ipv6/ip6_fib.c:2042 [inline]
 fib6_del+0xee1/0x1550 net/ipv6/ip6_fib.c:2087
 fib6_clean_node+0x29f/0x590 net/ipv6/ip6_fib.c:2249
 fib6_walk_continue+0x67b/0x910 net/ipv6/ip6_fib.c:2171
 fib6_walk+0x16b/0x2f0 net/ipv6/ip6_fib.c:2219
 fib6_clean_tree net/ipv6/ip6_fib.c:2299 [inline]
 __fib6_clean_all+0x25c/0x3b0 net/ipv6/ip6_fib.c:2315
 rt6_sync_down_dev net/ipv6/route.c:5003 [inline]
 rt6_disable_ip+0x117/0x730 net/ipv6/route.c:5008
 addrconf_ifdown+0x153/0x18c0 net/ipv6/addrconf.c:3853
 addrconf_notify+0x1bc/0x1010 net/ipv6/addrconf.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:12224
 unregister_netdevice_many net/core/dev.c:12317 [inline]
 default_device_exit_batch+0x819/0x890 net/core/dev.c:12821
 ops_exit_list net/core/net_namespace.c:205 [inline]
 ops_undo_list+0x525/0x990 net/core/net_namespace.c:252
 cleanup_net+0x4de/0x820 net/core/net_namespace.c:695
 process_one_work kernel/workqueue.c:3263 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>