netdevsim netdevsim1 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 ------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 1 PID: 151 at kernel/locking/lockdep.c:1960 print_bfs_bug+0x130/0x1e0 kernel/locking/lockdep.c:1960 Modules linked in: CPU: 1 PID: 151 Comm: kworker/u4:3 Not tainted 5.9.0-rc7-next-20200930-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net RIP: 0010:print_bfs_bug+0x130/0x1e0 kernel/locking/lockdep.c:1960 Code: e2 08 00 74 2c 48 c7 c7 c0 7f a6 8d e8 49 51 01 00 66 90 85 db 75 05 5b 5d 41 5c c3 89 ee 48 c7 c7 20 e8 ab 88 e8 7b e5 c0 06 <0f> 0b 5b 5d 41 5c c3 0f 0b e8 62 82 e9 06 85 c0 74 d7 48 c7 c0 38 RSP: 0018:ffffc90001547150 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: ffff8880a8826380 RSI: ffffffff815df1a5 RDI: fffff520002a8e1c RBP: 00000000ffffffff R08: 0000000000000001 R09: ffff8880ae520f8b R10: 0000000000000000 R11: 207065646b636f6c R12: ffff8880a8826380 R13: dffffc0000000000 R14: 0000000000000007 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000002dccad8 CR3: 0000000088fbd000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_irq_usage+0x6b4/0xc60 kernel/locking/lockdep.c:2585 check_prev_add kernel/locking/lockdep.c:2823 [inline] check_prevs_add kernel/locking/lockdep.c:2944 [inline] validate_chain kernel/locking/lockdep.c:3562 [inline] __lock_acquire+0x2873/0x56d0 kernel/locking/lockdep.c:4796 lock_acquire+0x1f2/0xaa0 kernel/locking/lockdep.c:5398 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 alloc_object lib/debugobjects.c:239 [inline] __debug_object_init+0x5c6/0xd10 lib/debugobjects.c:548 debug_timer_init kernel/time/timer.c:722 [inline] debug_init kernel/time/timer.c:775 [inline] init_timer_key+0x2d/0x310 kernel/time/timer.c:817 ipv6_mc_init_dev+0x129/0x430 net/ipv6/mcast.c:2586 ipv6_add_dev+0x8ce/0x1080 net/ipv6/addrconf.c:441 addrconf_notify+0x8d7/0x2310 net/ipv6/addrconf.c:3487 notifier_call_chain+0xb5/0x200 kernel/notifier.c:83 call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:2034 call_netdevice_notifiers_extack net/core/dev.c:2046 [inline] call_netdevice_notifiers net/core/dev.c:2060 [inline] register_netdevice+0x1068/0x1630 net/core/dev.c:9986 nsim_create+0x245/0x2f0 drivers/net/netdevsim/netdev.c:317 __nsim_dev_port_add+0x270/0x4c0 drivers/net/netdevsim/dev.c:931 nsim_dev_port_add_all drivers/net/netdevsim/dev.c:980 [inline] nsim_dev_reload_create drivers/net/netdevsim/dev.c:1023 [inline] nsim_dev_reload_up+0x4ea/0x7a0 drivers/net/netdevsim/dev.c:733 devlink_reload net/core/devlink.c:2984 [inline] devlink_reload+0x27c/0x3a0 net/core/devlink.c:2969 devlink_pernet_pre_exit+0xff/0x190 net/core/devlink.c:9743 ops_pre_exit_list net/core/net_namespace.c:176 [inline] cleanup_net+0x451/0xb10 net/core/net_namespace.c:591 process_one_work+0x933/0x15a0 kernel/workqueue.c:2269 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415 kthread+0x3af/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296