======================================
| [ 13.625401][ C3] #4: ffff88800fda3358 (&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
| [ 13.625867][ C3] #5: ffffffffbab5b5c0 (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)
| [ 13.626213][ C3]
| [ 13.626213][ C3] stack backtrace:
[ 13.626590][ C3] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 13.626592][ C3] Workqueue: events_unbound linkwatch_event
[ 13.626600][ C3] Call Trace:
[ 13.626605][ C3]
[ 13.626608][ C3] dump_stack_lvl (lib/dump_stack.c:123)
[ 13.626621][ C3] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6848)
[ 13.626636][ 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)
[ 13.626647][ C3] __dev_queue_xmit (net/core/dev.h:340 net/core/dev.c:4631)
[ 13.626658][ 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)
[ 13.626672][ C3] ? __pfx___dev_queue_xmit (net/core/dev.c:4538)
[ 13.626675][ C3] ? __pfx___alloc_skb (net/core/skbuff.c:642)
[ 13.626681][ C3] ? stack_trace_save (kernel/stacktrace.c:123)
[ 13.626689][ C3] ? __pfx_stack_trace_save (kernel/stacktrace.c:114)
[ 13.626696][ C3] ? __pfx___br_multicast_query_handle_vlan (net/bridge/br_multicast.c:909) bridge
[ 13.626758][ C3] br_dev_queue_push_xmit (net/bridge/br_forward.c:34) bridge
[ 13.626801][ C3] ? __pfx_br_dev_queue_push_xmit (net/bridge/br_forward.c:34) bridge
[ 13.626834][ 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
[ 13.626874][ C3] __br_multicast_send_query (net/bridge/br_multicast.c:1813) bridge
[ 13.626920][ C3] ? __pfx___br_multicast_send_query (net/bridge/br_multicast.c:1789) bridge
[ 13.626961][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5228)
[ 13.626972][ C3] ? br_multicast_send_query (net/bridge/br_multicast.c:1891) bridge
[ 13.627006][ C3] br_multicast_send_query (net/bridge/br_multicast.c:1891) bridge
[ 13.627044][ C3] ? __pfx_br_multicast_send_query (net/bridge/br_multicast.c:1852) bridge
[ 13.627081][ 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
[ 13.627118][ C3] ? __pfx_br_ip4_multicast_port_query_expired (net/bridge/br_multicast.c:1920) bridge
[ 13.627155][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816)
[ 13.627162][ 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)
[ 13.627167][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 13.627170][ C3] ? lock_acquire (kernel/locking/lockdep.c:5824)
[ 13.627173][ 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
[ 13.627213][ C3] ? br_multicast_port_query_expired (net/bridge/br_multicast.c:1917) bridge
[ 13.627246][ C3] ? __pfx_br_ip4_multicast_port_query_expired (net/bridge/br_multicast.c:1920) bridge
[ 13.627280][ C3] br_multicast_port_query_expired (net/bridge/br_multicast.c:1917) bridge
[ 13.627317][ C3] ? __pfx_br_ip4_multicast_port_query_expired (net/bridge/br_multicast.c:1920) bridge
[ 13.627351][ C3] call_timer_fn (kernel/time/timer.c:1789)
[ 13.627354][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779)
[ 13.627357][ C3] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779)
[ 13.627362][ C3] ? __pfx_call_timer_fn (kernel/time/timer.c:1766)
[ 13.627365][ 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)
[ 13.627374][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4323)
[ 13.627387][ C3] __run_timers (kernel/time/timer.c:1841 kernel/time/timer.c:2414)
[ 13.627391][ C3] ? __pfx_br_ip4_multicast_port_query_expired (net/bridge/br_multicast.c:1920) bridge
[ 13.627433][ C3] ? __pfx___run_timers (kernel/time/timer.c:2385)
[ 13.627442][ 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)
[ 13.627447][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 13.627451][ C3] ? lock_acquire (kernel/locking/lockdep.c:5824)
[ 13.627453][ C3] ? run_timer_softirq (kernel/time/timer.c:2426 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445)
[ 13.627464][ C3] run_timer_softirq (kernel/time/timer.c:2427 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445)
[ 13.627470][ C3] handle_softirqs (kernel/softirq.c:561)
[ 13.627480][ C3] ? ip6_route_add (./include/net/ip6_fib.h:341 net/ipv6/route.c:3872)
[ 13.627492][ C3] do_softirq (kernel/softirq.c:462 kernel/softirq.c:449)
[ 13.627496][ C3]
[ 13.627497][ C3]
[ 13.627498][ C3] __local_bh_enable_ip (kernel/softirq.c:389)
[ 13.627503][ C3] ip6_route_add (./include/net/ip6_fib.h:341 net/ipv6/route.c:3872)
[ 13.627510][ C3] addrconf_prefix_route (net/ipv6/addrconf.c:2461)
[ 13.627519][ C3] ? __pfx_addrconf_prefix_route (net/ipv6/addrconf.c:2461)
[ 13.627522][ C3] ? atomic_notifier_call_chain (kernel/notifier.c:227)
[ 13.627550][ C3] ? ip6_route_add (net/ipv6/route.c:3875)
[ 13.627562][ C3] addrconf_add_linklocal (./include/linux/spinlock.h:356 net/ipv6/addrconf.c:4164 net/ipv6/addrconf.c:3309)
[ 13.627568][ C3] ? __pfx_addrconf_add_linklocal (net/ipv6/addrconf.c:3286)
[ 13.627587][ C3] addrconf_addr_gen (net/ipv6/addrconf.c:3436)
[ 13.627591][ C3] ? __pfx_addrconf_addr_gen (net/ipv6/addrconf.c:3405)
[ 13.627606][ C3] ? addrconf_notify (./include/linux/err.h:81 net/ipv6/addrconf.c:3741)
[ 13.627609][ C3] addrconf_notify (./include/linux/err.h:81 net/ipv6/addrconf.c:3741)
[ 13.627617][ C3] notifier_call_chain (kernel/notifier.c:85 (discriminator 2))
[ 13.627628][ C3] netdev_state_change (net/core/dev.c:1538 net/core/dev.c:1529)
[ 13.627632][ C3] ? __pfx_netdev_state_change (net/core/dev.c:1530)
[ 13.627648][ C3] linkwatch_do_dev (net/core/link_watch.c:186)
[ 13.627652][ C3] __linkwatch_run_queue (./include/linux/spinlock.h:376 net/core/link_watch.c:245)
[ 13.627661][ C3] ? __pfx___linkwatch_run_queue (net/core/link_watch.c:195)
[ 13.627667][ C3] ? lock_acquire (kernel/locking/lockdep.c:5824)
[ 13.627678][ C3] linkwatch_event (net/core/link_watch.c:287)
[ 13.627680][ C3] process_one_work (kernel/workqueue.c:3238)
[ 13.627694][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5503)
[ 13.627699][ C3] ? __pfx_process_one_work (kernel/workqueue.c:3140)
[ 13.627713][ C3] ? assign_work (kernel/workqueue.c:1200)
[ 13.627723][ C3] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400)
[ 13.627737][ C3] ? __pfx_worker_thread (kernel/workqueue.c:3346)
[ 13.627744][ C3] kthread (kernel/kthread.c:464)
[ 13.627748][ C3] ? __pfx_kthread (kernel/kthread.c:413)
[ 13.627757][ C3] ? __pfx_kthread (kernel/kthread.c:413)
[ 13.627763][ C3] ret_from_fork (arch/x86/kernel/process.c:148)
[ 13.627769][ 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