[ 11.409816][ T281] ip (281) used greatest stack depth: 23312 bytes left [ 17.737288][ T11] [ 17.737398][ T11] ============================================ [ 17.737580][ T11] WARNING: possible recursive locking detected [ 17.737752][ T11] 6.13.0-rc5-virtme #1 Not tainted [ 17.737891][ T11] -------------------------------------------- [ 17.738063][ T11] kworker/u16:0/11 is trying to acquire lock: [ 17.738233][ T11] ffffffff8bbf6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 17.738520][ T11] [ 17.738520][ T11] but task is already holding lock: [ 17.738722][ T11] ffffffff8bbf6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 17.739000][ T11] [ 17.739000][ T11] other info that might help us debug this: [ 17.739200][ T11] Possible unsafe locking scenario: [ 17.739200][ T11] [ 17.739407][ T11] CPU0 [ 17.739509][ T11] ---- [ 17.739612][ T11] lock((netdev_chain).rwsem); [ 17.739750][ T11] lock((netdev_chain).rwsem); [ 17.739893][ T11] [ 17.739893][ T11] *** DEADLOCK *** [ 17.739893][ T11] [ 17.740094][ T11] May be due to missing lock nesting notation [ 17.740094][ T11] [ 17.740296][ T11] 5 locks held by kworker/u16:0/11: [ 17.740438][ T11] #0: ffff8880010b5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7ec/0x16d0 [ 17.740722][ T11] #1: ffffc900000b7da0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0xe0b/0x16d0 [ 17.740966][ T11] #2: ffffffff8bbec4d0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbc/0xba0 [ 17.741217][ T11] #3: ffffffff8bc07e88 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0x81/0x2e0 [ 17.741499][ T11] #4: ffffffff8bbf6a70 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain+0x50/0x90 [ 17.741781][ T11] [ 17.741781][ T11] stack backtrace: [ 17.741951][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.13.0-rc5-virtme #1 [ 17.742188][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 17.742359][ T11] Workqueue: netns cleanup_net [ 17.742502][ T11] Call Trace: [ 17.742615][ T11] [ 17.742689][ T11] dump_stack_lvl+0x82/0xd0 [ 17.742834][ T11] print_deadlock_bug+0x40a/0x650 [ 17.742978][ T11] validate_chain+0x5bf/0xae0 [ 17.743119][ T11] ? __pfx_validate_chain+0x10/0x10 [ 17.743258][ T11] ? hlock_class+0x4e/0x130 [ 17.743396][ T11] ? mark_lock+0x38/0x3e0 [ 17.743506][ T11] __lock_acquire+0xb9a/0x1680 [ 17.743648][ T11] lock_acquire.part.0+0xeb/0x330 [ 17.743785][ T11] ? blocking_notifier_call_chain+0x50/0x90 [ 17.743960][ T11] ? __lock_acquire+0xb9a/0x1680 [ 17.744099][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 17.744240][ T11] ? trace_lock_acquire+0x14c/0x1f0 [ 17.744378][ T11] ? lock_acquire+0x32/0xc0 [ 17.744515][ T11] ? blocking_notifier_call_chain+0x50/0x90 [ 17.744692][ T11] down_read+0x9f/0x340 [ 17.744800][ T11] ? blocking_notifier_call_chain+0x50/0x90 [ 17.744973][ T11] ? __pfx_down_read+0x10/0x10 [ 17.745114][ T11] ? __lock_release+0x103/0x460 [ 17.745255][ T11] blocking_notifier_call_chain+0x50/0x90 [ 17.745398][ T11] __netdev_upper_dev_unlink+0xd9/0x220 [ 17.745538][ T11] ? mark_held_locks+0x9e/0xe0 [ 17.745673][ T11] ? __pfx___netdev_upper_dev_unlink+0x10/0x10 [ 17.745848][ T11] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 17.746027][ T11] ? __try_to_del_timer_sync+0xe7/0x140 [ 17.746166][ T11] ? __pfx___try_to_del_timer_sync+0x10/0x10 [ 17.746338][ T11] ? mark_held_locks+0x9e/0xe0 [ 17.746482][ T11] netdev_upper_dev_unlink+0x71/0xa0 [ 17.746620][ T11] ? __pfx_netdev_upper_dev_unlink+0x10/0x10 [ 17.746788][ T11] ? mutex_is_locked+0x1c/0x60 [ 17.746930][ T11] ? rtnl_is_locked+0x15/0x20 [ 17.747069][ T11] ? netdev_master_upper_dev_get+0x13/0x120 [ 17.747241][ T11] vrf_device_event+0x78/0xe0 [ 17.747382][ T11] notifier_call_chain+0xcd/0x150 [ 17.747522][ T11] blocking_notifier_call_chain+0x66/0x90 [ 17.747664][ T11] unregister_netdevice_many_notify+0xa83/0x1580 [ 17.747844][ T11] ? __pfx_unregister_netdevice_many_notify+0x10/0x10 [ 17.748009][ T11] ? default_device_exit_batch+0x81/0x2e0 [ 17.748146][ T11] ? rtnl_is_locked+0x15/0x20 [ 17.748287][ T11] ? unregister_netdevice_queue+0x70/0x410 [ 17.748459][ T11] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 17.748635][ T11] ? __pfx_unregister_netdevice_queue+0x10/0x10 [ 17.748811][ T11] default_device_exit_batch+0x241/0x2e0 [ 17.748951][ T11] ? __pfx_default_device_exit_batch+0x10/0x10 [ 17.749125][ T11] ? ops_exit_list+0xb4/0x170 [ 17.749262][ T11] cleanup_net+0x4ef/0xba0 [ 17.749406][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 17.749554][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 17.749691][ T11] ? trace_lock_acquire+0x14c/0x1f0 [ 17.749829][ T11] ? lock_acquire+0x32/0xc0 [ 17.749967][ T11] ? process_one_work+0xe0b/0x16d0 [ 17.750102][ T11] process_one_work+0xe55/0x16d0 [ 17.750244][ T11] ? __pfx___lock_release+0x10/0x10 [ 17.750390][ T11] ? __pfx_process_one_work+0x10/0x10 [ 17.750535][ T11] ? assign_work+0x16c/0x240 [ 17.750676][ T11] worker_thread+0x58c/0xce0 [ 17.750824][ T11] ? __pfx_worker_thread+0x10/0x10 [ 17.750962][ T11] kthread+0x28a/0x350 [ 17.751070][ T11] ? __pfx_kthread+0x10/0x10 [ 17.751207][ T11] ret_from_fork+0x31/0x70 [ 17.751347][ T11] ? __pfx_kthread+0x10/0x10 [ 17.751487][ T11] ret_from_fork_asm+0x1a/0x30 [ 17.751638][ T11]