====================================== | [ 13.946558][ C2] #4: ffff88800590b358 (&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 | [ 13.947062][ C2] #5: ffffffff9455b5c0 (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) | [ 13.947440][ C2] | [ 13.947440][ C2] stack backtrace: [ 13.947726][ C2] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.947729][ C2] Workqueue: events_unbound linkwatch_event [ 13.947737][ C2] Call Trace: [ 13.947739][ C2] [ 13.947743][ C2] dump_stack_lvl (lib/dump_stack.c:123) [ 13.947752][ C2] lockdep_rcu_suspicious (kernel/locking/lockdep.c:6848) [ 13.947764][ C2] 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) [ 13.947776][ C2] __dev_queue_xmit (net/core/dev.h:340 net/core/dev.c:4631) [ 13.947786][ C2] ? __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) [ 13.947798][ C2] ? __pfx___dev_queue_xmit (net/core/dev.c:4538) [ 13.947801][ C2] ? __pfx___alloc_skb (net/core/skbuff.c:642) [ 13.947807][ C2] ? stack_trace_save (kernel/stacktrace.c:123) [ 13.947814][ C2] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) [ 13.947822][ C2] ? __pfx___br_multicast_query_handle_vlan (net/bridge/br_multicast.c:909) bridge [ 13.947877][ C2] br_dev_queue_push_xmit (net/bridge/br_forward.c:34) bridge [ 13.947910][ C2] ? __pfx_br_dev_queue_push_xmit (net/bridge/br_forward.c:34) bridge [ 13.947943][ C2] ? 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 [ 13.947983][ C2] __br_multicast_send_query (net/bridge/br_multicast.c:1813) bridge [ 13.948029][ C2] ? __pfx___br_multicast_send_query (net/bridge/br_multicast.c:1789) bridge [ 13.948070][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5228) [ 13.948080][ C2] ? br_multicast_send_query (net/bridge/br_multicast.c:1891) bridge [ 13.948114][ C2] br_multicast_send_query (net/bridge/br_multicast.c:1891) bridge [ 13.948156][ C2] ? __pfx_br_multicast_send_query (net/bridge/br_multicast.c:1852) bridge [ 13.948190][ C2] ? 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 [ 13.948228][ C2] ? __pfx_br_ip4_multicast_port_query_expired (net/bridge/br_multicast.c:1920) bridge [ 13.948266][ C2] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5816) [ 13.948276][ C2] ? 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) [ 13.948285][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 13.948292][ C2] ? lock_acquire (kernel/locking/lockdep.c:5824) [ 13.948295][ C2] ? 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 [ 13.948336][ C2] ? br_multicast_port_query_expired (net/bridge/br_multicast.c:1917) bridge [ 13.948369][ C2] ? __pfx_br_ip4_multicast_port_query_expired (net/bridge/br_multicast.c:1920) bridge [ 13.948402][ C2] br_multicast_port_query_expired (net/bridge/br_multicast.c:1917) bridge [ 13.948438][ C2] ? __pfx_br_ip4_multicast_port_query_expired (net/bridge/br_multicast.c:1920) bridge [ 13.948472][ C2] call_timer_fn (kernel/time/timer.c:1789) [ 13.948478][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) [ 13.948480][ C2] ? call_timer_fn (./include/linux/lockdep.h:31 kernel/time/timer.c:1779) [ 13.948485][ C2] ? __pfx_call_timer_fn (kernel/time/timer.c:1766) [ 13.948488][ C2] ? 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) [ 13.948498][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4323) [ 13.948518][ C2] __run_timers (kernel/time/timer.c:1841 kernel/time/timer.c:2414) [ 13.948525][ C2] ? __pfx_br_ip4_multicast_port_query_expired (net/bridge/br_multicast.c:1920) bridge [ 13.948569][ C2] ? __pfx___run_timers (kernel/time/timer.c:2385) [ 13.948578][ C2] ? 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) [ 13.948583][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 13.948587][ C2] ? lock_acquire (kernel/locking/lockdep.c:5824) [ 13.948589][ C2] ? run_timer_softirq (kernel/time/timer.c:2426 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445) [ 13.948600][ C2] run_timer_softirq (kernel/time/timer.c:2427 kernel/time/timer.c:2418 kernel/time/timer.c:2435 kernel/time/timer.c:2445) [ 13.948606][ C2] handle_softirqs (kernel/softirq.c:561) [ 13.948617][ C2] ? ip6_route_add (./include/net/ip6_fib.h:341 net/ipv6/route.c:3872) [ 13.948627][ C2] do_softirq (kernel/softirq.c:462 kernel/softirq.c:449) [ 13.948631][ C2] [ 13.948632][ C2] [ 13.948634][ C2] __local_bh_enable_ip (kernel/softirq.c:389) [ 13.948638][ C2] ip6_route_add (./include/net/ip6_fib.h:341 net/ipv6/route.c:3872) [ 13.948645][ C2] addrconf_prefix_route (net/ipv6/addrconf.c:2461) [ 13.948656][ C2] ? __pfx_addrconf_prefix_route (net/ipv6/addrconf.c:2461) [ 13.948660][ C2] ? atomic_notifier_call_chain (kernel/notifier.c:227) [ 13.948690][ C2] ? ip6_route_add (net/ipv6/route.c:3875) [ 13.948702][ C2] addrconf_add_linklocal (./include/linux/spinlock.h:356 net/ipv6/addrconf.c:4164 net/ipv6/addrconf.c:3309) [ 13.948709][ C2] ? __pfx_addrconf_add_linklocal (net/ipv6/addrconf.c:3286) [ 13.948727][ C2] addrconf_addr_gen (net/ipv6/addrconf.c:3436) [ 13.948732][ C2] ? __pfx_addrconf_addr_gen (net/ipv6/addrconf.c:3405) [ 13.948747][ C2] ? addrconf_notify (./include/linux/err.h:81 net/ipv6/addrconf.c:3741) [ 13.948750][ C2] addrconf_notify (./include/linux/err.h:81 net/ipv6/addrconf.c:3741) [ 13.948758][ C2] notifier_call_chain (kernel/notifier.c:85 (discriminator 2)) [ 13.948769][ C2] netdev_state_change (net/core/dev.c:1538 net/core/dev.c:1529) [ 13.948774][ C2] ? __pfx_netdev_state_change (net/core/dev.c:1530) [ 13.948790][ C2] linkwatch_do_dev (net/core/link_watch.c:186) [ 13.948794][ C2] __linkwatch_run_queue (./include/linux/spinlock.h:376 net/core/link_watch.c:245) [ 13.948801][ C2] ? __pfx___linkwatch_run_queue (net/core/link_watch.c:195) [ 13.948808][ C2] ? lock_acquire (kernel/locking/lockdep.c:5824) [ 13.948818][ C2] linkwatch_event (net/core/link_watch.c:287) [ 13.948821][ C2] process_one_work (kernel/workqueue.c:3238) [ 13.948836][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5503) [ 13.948841][ C2] ? __pfx_process_one_work (kernel/workqueue.c:3140) [ 13.948854][ C2] ? assign_work (kernel/workqueue.c:1200) [ 13.948865][ C2] worker_thread (kernel/workqueue.c:3313 kernel/workqueue.c:3400) [ 13.948879][ C2] ? __pfx_worker_thread (kernel/workqueue.c:3346) [ 13.948886][ C2] kthread (kernel/kthread.c:464) [ 13.948890][ C2] ? __pfx_kthread (kernel/kthread.c:413) [ 13.948899][ C2] ? __pfx_kthread (kernel/kthread.c:413) [ 13.948905][ C2] ret_from_fork (arch/x86/kernel/process.c:148) [ 13.948911][ C2] ? __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