====================================== | [ 18.778135][ T39] #2: ffffffff9dde7a48 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event (net/core/link_watch.c:282) | [ 18.778424][ T39] #3: ffffffff9ddd6630 ((netdev_chain).rwsem){++++}-{4:4}, at: blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) | [ 18.778738][ T39] | [ 18.778738][ T39] stack backtrace: [ 18.779199][ T39] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.779396][ T39] Workqueue: events_unbound linkwatch_event [ 18.779589][ T39] Call Trace: [ 18.779723][ T39] [ 18.779806][ T39] dump_stack_lvl (lib/dump_stack.c:123) [ 18.779998][ T39] print_circular_bug (kernel/locking/lockdep.c:2077) [ 18.780165][ T39] check_noncircular (kernel/locking/lockdep.c:2206) [ 18.780316][ T39] ? rcu_read_lock_any_held (kernel/rcu/update.c:386 kernel/rcu/update.c:380) [ 18.780489][ T39] ? __bfs (kernel/locking/lockdep.c:1811 (discriminator 1)) [ 18.780624][ T39] ? __pfx_check_noncircular (kernel/locking/lockdep.c:2182) [ 18.780786][ T39] ? check_irq_usage (kernel/locking/lockdep.c:2828) [ 18.780939][ T39] ? alloc_chain_hlocks (kernel/locking/lockdep.c:3528) [ 18.781093][ T39] ? __pfx_check_irq_usage (kernel/locking/lockdep.c:2813) [ 18.781246][ T39] check_prev_add (kernel/locking/lockdep.c:3162) [ 18.781408][ T39] validate_chain (kernel/locking/lockdep.c:3281 kernel/locking/lockdep.c:3904) [ 18.781571][ T39] ? __pfx_validate_chain (kernel/locking/lockdep.c:3860) [ 18.781723][ T39] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 18.781891][ T39] ? mark_lock (kernel/locking/lockdep.c:4727 (discriminator 3)) [ 18.782015][ T39] __lock_acquire (kernel/locking/lockdep.c:5226) [ 18.782178][ T39] ? check_prev_add (kernel/locking/lockdep.c:3180) [ 18.782335][ T39] lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 18.782493][ T39] ? team_port_change_check (drivers/net/team/team_core.c:2939 drivers/net/team/team_core.c:2962) [ 18.782655][ T39] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5814) [ 18.782805][ T39] ? trace_lock_acquire (./include/trace/events/lock.h:24 (discriminator 37)) [ 18.782966][ T39] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 18.783152][ T39] ? team_port_change_check (drivers/net/team/team_core.c:2939 drivers/net/team/team_core.c:2962) [ 18.783322][ T39] __mutex_lock (kernel/locking/mutex.c:587 kernel/locking/mutex.c:735) [ 18.783483][ T39] ? team_port_change_check (drivers/net/team/team_core.c:2939 drivers/net/team/team_core.c:2962) [ 18.783644][ T39] ? team_port_change_check (drivers/net/team/team_core.c:2939 drivers/net/team/team_core.c:2962) [ 18.783830][ T39] ? __pfx___mutex_lock (kernel/locking/mutex.c:734) [ 18.784004][ T39] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5851) [ 18.784179][ T39] ? blocking_notifier_call_chain (kernel/notifier.c:380 kernel/notifier.c:368) [ 18.784374][ T39] ? find_held_lock (kernel/locking/lockdep.c:5339) [ 18.784529][ T39] ? __pfx_fib_sync_up (net/ipv4/fib_semantics.c:2111) [ 18.784707][ T39] ? __pfx_rwsem_read_trylock (kernel/locking/rwsem.c:249) [ 18.784864][ T39] ? team_port_change_check (drivers/net/team/team_core.c:2939 drivers/net/team/team_core.c:2962) [ 18.785020][ T39] team_port_change_check (drivers/net/team/team_core.c:2939 drivers/net/team/team_core.c:2962) [ 18.785174][ T39] team_device_event (drivers/net/team/team_core.c:3017) [ 18.785333][ T39] ? trace_notifier_run (./include/trace/events/notifier.h:59 (discriminator 37)) [ 18.785526][ T39] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 18.785711][ T39] blocking_notifier_call_chain (kernel/notifier.c:381 kernel/notifier.c:368) [ 18.785875][ T39] netdev_state_change (net/core/dev.c:1381 net/core/dev.c:1372) [ 18.786023][ T39] ? __pfx_netdev_state_change (net/core/dev.c:1373) [ 18.786182][ T39] linkwatch_do_dev (net/core/link_watch.c:182) [ 18.786366][ T39] __linkwatch_run_queue (./include/linux/spinlock.h:376 net/core/link_watch.c:241) [ 18.786576][ T39] ? __pfx___linkwatch_run_queue (net/core/link_watch.c:191) [ 18.786768][ T39] ? lock_acquire (kernel/locking/lockdep.c:5822) [ 18.786922][ T39] linkwatch_event (net/core/link_watch.c:283) [ 18.787068][ T39] process_one_work (kernel/workqueue.c:3229) [ 18.787226][ T39] ? __pfx___lock_release (kernel/locking/lockdep.c:5501) [ 18.787405][ T39] ? __pfx_process_one_work (kernel/workqueue.c:3131) [ 18.787558][ T39] ? assign_work (kernel/workqueue.c:1200) [ 18.787861][ T39] worker_thread (kernel/workqueue.c:3304 kernel/workqueue.c:3391) [ 18.788020][ T39] ? __pfx_worker_thread (kernel/workqueue.c:3337) [ 18.788193][ T39] kthread (kernel/kthread.c:389) [ 18.788325][ T39] ? __pfx_kthread (kernel/kthread.c:342) [ 18.788566][ T39] ret_from_fork (arch/x86/kernel/process.c:147) [ 18.788775][ T39] ? __pfx_kthread (kernel/kthread.c:342) Finger prints: print_circular_bug:check_noncircular:check_prev_add:validate_chain:__lock_acquire