======================================
| [ 13.724458][ C3] #4: ffff8880059cb358 (&br->multicast_lock){+.-.}-{3:3}, at: br_multicast_port_query_expired (./include/trace/events/../../../net/bridge/br_private.h:1293 ./include/trace/events/../../../net/bridge/br_private.h:1302 net/bridge/br_multicast.c:1906) bridge
| [ 13.724947][ C3] #5: ffffffffa1b5b5c0 (rcu_read_lock_bh){....}-{1:3}, at: __dev_queue_xmit (./include/linux/bottom_half.h:20 ./include/linux/rcupdate.h:901 net/core/dev.c:4555)
| [ 13.725309][ C3]
| [ 13.725309][ C3] stack backtrace:
[ 13.725564][ C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 13.725567][ C3] Workqueue: events_unbound linkwatch_event
[ 13.725572][ C3] Call Trace:
[ 13.725574][ C3]
[ 13.725577][ C3] dump_stack_lvl (lib/dump_stack.c:123)
[ 13.725584][ C3] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6848)
[ 13.725594][ C3] dev_hard_start_xmit (./include/net/net_namespace.h:418 ./include/linux/netdevice.h:2695 net/core/dev.c:2466 net/core/dev.c:3772 net/core/dev.c:3793)
[ 13.725606][ C3] __dev_queue_xmit (net/core/dev.h:340 net/core/dev.c:4631)
[ 13.725616][ C3] ? __build_skb_around (./arch/x86/include/asm/atomic.h:28 ./include/linux/atomic/atomic-arch-fallback.h:503 ./include/linux/atomic/atomic-instrumented.h:68 net/core/skbuff.c:381 net/core/skbuff.c:439)
[ 13.725627][ C3] ? __pfx___dev_queue_xmit (net/core/dev.c:4538)
[ 13.725630][ C3] ? __pfx___alloc_skb (net/core/skbuff.c:642)
[ 13.725636][ C3] ? stack_trace_save (kernel/stacktrace.c:123)
[ 13.725642][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114)
[ 13.725649][ C3] ? __pfx___br_multicast_query_handle_vlan (net/bridge/br_multicast.c:909) bridge
[ 13.725704][ C3] br_dev_queue_push_xmit (net/bridge/br_forward.c:34) bridge
[ 13.725736][ C3] ? __pfx_br_dev_queue_push_xmit (net/bridge/br_forward.c:34) bridge
[ 13.725769][ C3] ? br_multicast_count (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/trace/events/../../../net/bridge/br_private.h:764 net/bridge/br_multicast.c:5052) bridge
[ 13.725808][ C3] __br_multicast_send_query (net/bridge/br_multicast.c:1813) bridge
[ 13.725854][ C3] ? __pfx___br_multicast_send_query (net/bridge/br_multicast.c:1789) bridge
[ 13.725895][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5228)
[ 13.725905][ C3] ? br_multicast_send_query (net/bridge/br_multicast.c:1891) bridge
[ 13.725940][ C3] br_multicast_send_query (net/bridge/br_multicast.c:1891) bridge
[ 13.725991][ C3] ? __pfx_br_multicast_send_query (net/bridge/br_multicast.c:1852) bridge
[ 13.726025][ C3] ? br_multicast_port_query_expired (./include/trace/events/../../../net/bridge/br_private.h:1293 ./include/trace/events/../../../net/bridge/br_private.h:1302 net/bridge/br_multicast.c:1906) bridge
[ 13.726063][ C3] ? __pfx_br_ip4_multicast_port_query_expired (net/bridge/br_multicast.c:1920) bridge
[ 13.726100][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816)
[ 13.726107][ C3] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116)
[ 13.726112][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 13.726115][ C3] ? lock_acquire (kernel/locking/lockdep.c:5824)
[ 13.726118][ C3] ? br_multicast_port_query_expired (./include/trace/events/../../../net/bridge/br_private.h:1293 ./include/trace/events/../../../net/bridge/br_private.h:1302 net/bridge/br_multicast.c:1906) bridge
[ 13.726158][ C3] ? br_multicast_port_query_expired (net/bridge/br_multicast.c:1917) bridge
[ 13.726191][ C3] ? __pfx_br_ip4_multicast_port_query_expired (net/bridge/br_multicast.c:1920) bridge
[ 13.726224][ C3] br_multicast_port_query_expired (net/bridge/br_multicast.c:1917) bridge
[ 13.726261][ C3] ? __pfx_br_ip4_multicast_port_query_expired (net/bridge/br_multicast.c:1920) bridge
[ 13.726295][ C3] call_timer_fn (kernel/time/timer.c:1789)
[ 13.726299][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779)
[ 13.726301][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779)
[ 13.726306][ C3] ? __pfx_call_timer_fn (kernel/time/timer.c:1766)
[ 13.726309][ C3] ? 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:230)
[ 13.726318][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4323)
[ 13.726330][ C3] __run_timers (kernel/time/timer.c:1841 kernel/time/timer.c:2414)
[ 13.726334][ C3] ? __pfx_br_ip4_multicast_port_query_expired (net/bridge/br_multicast.c:1920) bridge
[ 13.726376][ C3] ? __pfx___run_timers (kernel/time/timer.c:2385)
[ 13.726385][ C3] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:107 ./include/linux/atomic/atomic-arch-fallback.h:2170 ./include/linux/atomic/atomic-instrumented.h:1302 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116)
[ 13.726390][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 13.726393][ C3] ? lock_acquire (kernel/locking/lockdep.c:5824)
[ 13.726396][ C3] ? run_timer_softirq (kernel/time/timer.c:2426 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445)
[ 13.726407][ C3] run_timer_softirq (kernel/time/timer.c:2427 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445)
[ 13.726412][ C3] handle_softirqs (kernel/softirq.c:561)
[ 13.726422][ C3] ? br_device_event (net/bridge/br.c:97) bridge
[ 13.726464][ C3] do_softirq (kernel/softirq.c:462 kernel/softirq.c:449)
[ 13.726469][ C3]
[ 13.726470][ C3]
[ 13.726471][ C3] __local_bh_enable_ip (kernel/softirq.c:389)
[ 13.726476][ C3] br_device_event (net/bridge/br.c:97) bridge
[ 13.726506][ C3] ? __pfx_br_device_event (net/bridge/br.c:29) bridge
[ 13.726538][ C3] ? packet_notifier (net/packet/af_packet.c:4281)
[ 13.726548][ C3] notifier_call_chain (kernel/notifier.c:85 (discriminator 2))
[ 13.726560][ C3] netdev_state_change (net/core/dev.c:1538 net/core/dev.c:1529)
[ 13.726564][ C3] ? __pfx_netdev_state_change (net/core/dev.c:1530)
[ 13.726580][ C3] linkwatch_do_dev (net/core/link_watch.c:186)
[ 13.726584][ C3] __linkwatch_run_queue (./include/linux/spinlock.h:376 net/core/link_watch.c:245)
[ 13.726591][ C3] ? __pfx___linkwatch_run_queue (net/core/link_watch.c:195)
[ 13.726598][ C3] ? lock_acquire (kernel/locking/lockdep.c:5824)
[ 13.726608][ C3] linkwatch_event (net/core/link_watch.c:287)
[ 13.726610][ C3] process_one_work (kernel/workqueue.c:3238)
[ 13.726624][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5503)
[ 13.726629][ C3] ? __pfx_process_one_work (kernel/workqueue.c:3140)
[ 13.726642][ C3] ? assign_work (kernel/workqueue.c:1200)
[ 13.726652][ C3] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400)
[ 13.726666][ C3] ? __pfx_worker_thread (kernel/workqueue.c:3346)
[ 13.726672][ C3] kthread (kernel/kthread.c:464)
[ 13.726677][ C3] ? __pfx_kthread (kernel/kthread.c:413)
[ 13.726686][ C3] ? __pfx_kthread (kernel/kthread.c:413)
[ 13.726691][ C3] ret_from_fork (arch/x86/kernel/process.c:148)
[ 13.726695][ C3] ? __pfx_kthread (kernel/kthread.c:413)
Finger prints:
lockdep_rcu_suspicious:dev_hard_start_xmit:__dev_queue_xmit:br_dev_queue_push_xmit:__br_multicast_send_query