bridge0: received packet on vlan2 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on vlan2 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=104961, q=90843 ncpus=2) rcu: All QSes seen, last rcu_preempt kthread activity 3586 (4295002230-4294998644), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 3586 jiffies! g104961 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior. rcu: RCU grace-period kthread stack dump: task:rcu_preempt state:R running task stack:27752 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5510 [inline] __schedule+0x17d9/0x56c0 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7326 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x30c/0x11f0 kernel/rcu/tree.c:2123 rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2325 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 rcu: Stack dump where RCU GP kthread last ran: Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 62 Comm: kworker/u8:4 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:advance_sched+0x1b7/0xc80 net/sched/sch_taprio.c:935 Code: d8 48 c1 e8 03 48 89 44 24 60 42 80 3c 30 00 74 08 48 89 df e8 0a 0d 58 f8 48 89 5c 24 30 48 8b 03 48 89 04 24 e8 69 1a f7 01 <89> c3 31 ff 89 c6 e8 0e 75 ea f7 85 db 74 2d 48 8b 44 24 28 48 8d RSP: 0018:ffffc90000005eb8 EFLAGS: 00000046 RAX: 0000000000000001 RBX: ffff888051cb62f0 RCX: ffff88801c390000 RDX: 0000000000010100 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffff888051cb6300 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52000000bc8 R12: 0000000000000000 R13: ffff888051cb6000 R14: dffffc0000000000 R15: ffff88807dd89800 FS: 0000000000000000(0000) GS:ffff888124f4c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc3a7000218 CR3: 0000000073e58000 CR4: 00000000003526f0 Call Trace: __run_hrtimer kernel/time/hrtimer.c:2032 [inline] __hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2096 hrtimer_interrupt+0x448/0x910 kernel/time/hrtimer.c:2215 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1051 [inline] __sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1068 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1062 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:198 Code: f7 e8 2d fd cc f5 f7 c3 00 02 00 00 74 05 e8 90 dd f8 f5 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 c4 10 be f5 65 8b 05 bd e0 96 07 85 c0 74 18 5b 41 5e c3 cc cc RSP: 0018:ffffc90000006268 EFLAGS: 00000206 RAX: 0000000000000002 RBX: 0000000000000282 RCX: 0000000080000302 RDX: 0000000000000002 RSI: ffffffff8e23666e RDI: 0000000000000001 RBP: 0000000000a12110 R08: ffffffff90576d37 R09: 1ffffffff20aeda6 R10: dffffc0000000000 R11: fffffbfff20aeda7 R12: 0000000000000000 R13: ffff88809d754000 R14: ffffffff9aa71e68 R15: 0000000000000000 __debug_check_no_obj_freed lib/debugobjects.c:1180 [inline] debug_check_no_obj_freed+0x39e/0x450 lib/debugobjects.c:1201 slab_free_hook mm/slub.c:2608 [inline] slab_free mm/slub.c:6377 [inline] kmem_cache_free+0xfd/0x650 mm/slub.c:6504 skb_ext_reset include/linux/skbuff.h:5118 [inline] skb_scrub_packet+0x2c8/0x3d0 net/core/skbuff.c:6284 ____dev_forward_skb include/linux/netdevice.h:4478 [inline] __dev_forward_skb2+0x28c/0x730 net/core/dev.c:2466 veth_forward_skb drivers/net/veth.c:324 [inline] veth_xmit+0x493/0xe60 drivers/net/veth.c:380 __netdev_start_xmit include/linux/netdevice.h:5424 [inline] netdev_start_xmit include/linux/netdevice.h:5433 [inline] xmit_one net/core/dev.c:3914 [inline] dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:3930 __dev_queue_xmit+0x14c0/0x3820 net/core/dev.c:4903 dev_queue_xmit include/linux/netdevice.h:3456 [inline] br_dev_queue_push_xmit+0x370/0x4b0 net/bridge/br_forward.c:53 NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:325 br_nf_post_routing+0xa53/0xee0 net/bridge/br_netfilter_hooks.c:964 nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline] nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619 nf_hook include/linux/netfilter.h:280 [inline] NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:323 br_forward_finish+0xd3/0x130 net/bridge/br_forward.c:66 br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:1165 [inline] br_nf_forward_finish+0xa76/0xea0 net/bridge/br_netfilter_hooks.c:667 NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:325 br_nf_forward_ip+0x7eb/0xa30 net/bridge/br_netfilter_hooks.c:721 nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline] nf_hook_slow+0xc5/0x220 net/netfilter/core.c:619 nf_hook include/linux/netfilter.h:280 [inline] NF_HOOK+0x23e/0x3f0 include/linux/netfilter.h:323 __br_forward+0x397/0x540 net/bridge/br_forward.c:115 deliver_clone net/bridge/br_forward.c:131 [inline] maybe_deliver net/bridge/br_forward.c:191 [inline] br_flood+0x3e6/0x8d0 net/bridge/br_forward.c:245 br_handle_frame_finish+0x1119/0x1950 net/bridge/br_input.c:229 br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:1165 [inline] br_nf_pre_routing_finish+0x138a/0x1a10 net/bridge/br_netfilter_hooks.c:430 NF_HOOK+0x64e/0x6e0 include/linux/netfilter.h:325 br_nf_pre_routing+0xec2/0x14b0 net/bridge/br_netfilter_hooks.c:539 nf_hook_entry_hookfn include/linux/netfilter.h:165 [inline] nf_hook_bridge_pre net/bridge/br_input.c:291 [inline] br_handle_frame+0x127f/0x1510 net/bridge/br_input.c:442 __netif_receive_skb_core+0x989/0x30b0 net/core/dev.c:6128 __netif_receive_skb_list_core+0x24d/0x830 net/core/dev.c:6316 __netif_receive_skb_list net/core/dev.c:6383 [inline] netif_receive_skb_list_internal+0x995/0xcf0 net/core/dev.c:6474 gro_normal_list include/net/gro.h:523 [inline] gro_flush_normal include/net/gro.h:531 [inline] napi_complete_done+0x299/0x730 net/core/dev.c:6842 gro_cell_poll+0x5ab/0x5d0 net/core/gro_cells.c:74 __napi_poll+0xaa/0x330 net/core/dev.c:7764 napi_poll net/core/dev.c:7827 [inline] net_rx_action+0x61d/0xf50 net/core/dev.c:7984 handle_softirqs+0x225/0x840 kernel/softirq.c:622 do_softirq+0x76/0xd0 kernel/softirq.c:523 __local_bh_enable_ip+0xf8/0x130 kernel/softirq.c:450 ieee80211_rx_bss_info net/mac80211/ibss.c:1137 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1546 [inline] ieee80211_ibss_rx_queued_mgmt+0x1e97/0x2c40 net/mac80211/ibss.c:1573 ieee80211_iface_process_skb net/mac80211/iface.c:1769 [inline] ieee80211_iface_work+0x78a/0x1010 net/mac80211/iface.c:1823 cfg80211_wiphy_work+0x29e/0x420 net/wireless/core.c:541 process_one_work kernel/workqueue.c:3322 [inline] process_scheduled_works+0xa8e/0x14e0 kernel/workqueue.c:3405 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3486 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 net_ratelimit: 7898 callbacks suppressed bridge0: received packet on veth1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on veth0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on vlan2 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on veth1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on vlan2 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on veth0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on vlan2 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on veth1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on vlan2 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on veth0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) net_ratelimit: 9951 callbacks suppressed bridge0: received packet on veth1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on vlan2 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on veth0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on vlan2 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on veth1 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on vlan2 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on vlan2 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on vlan2 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on vlan2 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) bridge0: received packet on vlan2 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:1) ip6_tunnel: ip6tnl1 xmit: Local address not yet configured!